./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe012_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.2024-05-21_14-57-05.files/protection/safe012_pso.oepc_pso.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f 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/safe012_pso.oepc_pso.opt_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe012_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-bcb38a6-m [2024-06-04 15:35:34,049 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 15:35:34,139 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 15:35:34,143 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 15:35:34,144 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 15:35:34,166 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 15:35:34,167 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 15:35:34,167 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 15:35:34,167 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 15:35:34,170 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 15:35:34,171 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 15:35:34,171 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 15:35:34,171 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 15:35:34,173 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 15:35:34,173 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 15:35:34,173 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 15:35:34,173 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 15:35:34,173 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 15:35:34,173 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 15:35:34,173 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 15:35:34,174 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 15:35:34,175 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 15:35:34,175 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 15:35:34,175 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 15:35:34,175 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 15:35:34,175 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 15:35:34,176 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 15:35:34,176 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 15:35:34,176 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 15:35:34,176 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 15:35:34,177 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 15:35:34,177 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 15:35:34,177 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 15:35:34,177 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 15:35:34,178 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 15:35:34,178 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 15:35:34,178 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 15:35:34,178 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 15:35:34,178 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 15:35:34,178 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 15:35:34,178 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 15:35:34,179 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 15:35:34,179 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 15:35:34,179 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 15:35:34,452 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 15:35:34,475 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 15:35:34,477 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 15:35:34,478 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 15:35:34,478 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 15:35:34,479 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe012_pso.oepc_pso.opt_rmo.opt.yml/witness.yml [2024-06-04 15:35:34,617 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 15:35:34,618 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 15:35:34,618 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe012_pso.oepc_pso.opt_rmo.opt.i [2024-06-04 15:35:35,723 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 15:35:35,937 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 15:35:35,938 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe012_pso.oepc_pso.opt_rmo.opt.i [2024-06-04 15:35:35,962 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fc109f0e/afb90a4d718047908116aac9064da793/FLAGfd32a3f59 [2024-06-04 15:35:35,975 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fc109f0e/afb90a4d718047908116aac9064da793 [2024-06-04 15:35:35,975 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 15:35:35,976 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 15:35:35,978 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 15:35:35,979 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 15:35:35,982 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 15:35:35,983 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 03:35:34" (1/2) ... [2024-06-04 15:35:35,983 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ecb3d51 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:35:35, skipping insertion in model container [2024-06-04 15:35:35,984 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 03:35:34" (1/2) ... [2024-06-04 15:35:35,985 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@260db5be and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:35:35, skipping insertion in model container [2024-06-04 15:35:35,985 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 03:35:35" (2/2) ... [2024-06-04 15:35:35,985 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ecb3d51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:35:35, skipping insertion in model container [2024-06-04 15:35:35,985 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 03:35:35" (2/2) ... [2024-06-04 15:35:35,985 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 15:35:36,055 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 15:35:36,059 INFO L97 edCorrectnessWitness]: Location invariant before [L834-L834] ((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1))) [2024-06-04 15:35:36,060 INFO L97 edCorrectnessWitness]: Location invariant before [L836-L836] ((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$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 || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1))) [2024-06-04 15:35:36,060 INFO L97 edCorrectnessWitness]: Location invariant before [L837-L837] ((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1))) [2024-06-04 15:35:36,060 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 15:35:36,061 INFO L106 edCorrectnessWitness]: ghost_update [L832-L832] multithreaded = 1; [2024-06-04 15:35:36,099 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 15:35:36,419 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 15:35:36,456 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 15:35:36,564 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 15:35:36,612 INFO L206 MainTranslator]: Completed translation [2024-06-04 15:35:36,612 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:35:36 WrapperNode [2024-06-04 15:35:36,612 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 15:35:36,613 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 15:35:36,614 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 15:35:36,614 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 15:35:36,649 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:35:36" (1/1) ... [2024-06-04 15:35:36,697 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:35:36" (1/1) ... [2024-06-04 15:35:36,723 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 126 [2024-06-04 15:35:36,723 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 15:35:36,724 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 15:35:36,724 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 15:35:36,724 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 15:35:36,732 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:35:36" (1/1) ... [2024-06-04 15:35:36,732 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:35:36" (1/1) ... [2024-06-04 15:35:36,740 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:35:36" (1/1) ... [2024-06-04 15:35:36,751 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]. [2024-06-04 15:35:36,751 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:35:36" (1/1) ... [2024-06-04 15:35:36,751 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:35:36" (1/1) ... [2024-06-04 15:35:36,757 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:35:36" (1/1) ... [2024-06-04 15:35:36,759 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:35:36" (1/1) ... [2024-06-04 15:35:36,761 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:35:36" (1/1) ... [2024-06-04 15:35:36,762 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:35:36" (1/1) ... [2024-06-04 15:35:36,764 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 15:35:36,765 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 15:35:36,765 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 15:35:36,765 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 15:35:36,774 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:35:36" (1/1) ... [2024-06-04 15:35:36,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 15:35:36,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 15:35:36,796 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) [2024-06-04 15:35:36,812 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 [2024-06-04 15:35:36,824 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 15:35:36,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 15:35:36,825 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 15:35:36,825 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 15:35:36,825 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 15:35:36,825 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 15:35:36,825 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 15:35:36,825 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 15:35:36,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 15:35:36,825 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 15:35:36,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 15:35:36,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 15:35:36,827 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-04 15:35:36,916 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 15:35:36,918 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 15:35:37,213 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 15:35:37,213 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 15:35:37,335 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 15:35:37,335 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 15:35:37,335 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 03:35:37 BoogieIcfgContainer [2024-06-04 15:35:37,336 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 15:35:37,338 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 15:35:37,338 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 15:35:37,340 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 15:35:37,340 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 03:35:34" (1/4) ... [2024-06-04 15:35:37,341 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@508cdb39 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 03:35:37, skipping insertion in model container [2024-06-04 15:35:37,341 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 03:35:35" (2/4) ... [2024-06-04 15:35:37,341 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@508cdb39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 03:35:37, skipping insertion in model container [2024-06-04 15:35:37,342 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:35:36" (3/4) ... [2024-06-04 15:35:37,342 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@508cdb39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 03:35:37, skipping insertion in model container [2024-06-04 15:35:37,342 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 03:35:37" (4/4) ... [2024-06-04 15:35:37,343 INFO L112 eAbstractionObserver]: Analyzing ICFG safe012_pso.oepc_pso.opt_rmo.opt.i [2024-06-04 15:35:37,356 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 15:35:37,356 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-04 15:35:37,356 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 15:35:37,404 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 15:35:37,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-04 15:35:37,458 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-04 15:35:37,458 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 15:35:37,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-04 15:35:37,461 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-04 15:35:37,463 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-04 15:35:37,469 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 15:35:37,473 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;@7c989ab4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 15:35:37,473 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-04 15:35:37,476 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 15:35:37,476 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-04 15:35:37,476 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 15:35:37,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:37,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 15:35:37,477 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)] === [2024-06-04 15:35:37,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:37,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1642983866, now seen corresponding path program 1 times [2024-06-04 15:35:37,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:37,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121771744] [2024-06-04 15:35:37,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:37,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:37,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:38,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:38,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:38,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121771744] [2024-06-04 15:35:38,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121771744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:38,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:38,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 15:35:38,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846352237] [2024-06-04 15:35:38,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:38,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 15:35:38,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:38,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 15:35:38,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 15:35:38,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-04 15:35:38,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:38,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:38,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-04 15:35:38,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:38,634 INFO L124 PetriNetUnfolderBase]: 891/1369 cut-off events. [2024-06-04 15:35:38,634 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-06-04 15:35:38,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2792 conditions, 1369 events. 891/1369 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6481 event pairs, 520 based on Foata normal form. 2/1341 useless extension candidates. Maximal degree in co-relation 2777. Up to 1335 conditions per place. [2024-06-04 15:35:38,643 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 33 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-04 15:35:38,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 43 transitions, 175 flow [2024-06-04 15:35:38,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 15:35:38,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 15:35:38,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2024-06-04 15:35:38,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-04 15:35:38,653 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 76 transitions. [2024-06-04 15:35:38,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 43 transitions, 175 flow [2024-06-04 15:35:38,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 43 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 15:35:38,656 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-04 15:35:38,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-04 15:35:38,660 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-04 15:35:38,660 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-04 15:35:38,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:38,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:38,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:38,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 15:35:38,661 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)] === [2024-06-04 15:35:38,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:38,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1002044048, now seen corresponding path program 1 times [2024-06-04 15:35:38,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:38,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448036768] [2024-06-04 15:35:38,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:38,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:38,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:39,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:39,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:39,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448036768] [2024-06-04 15:35:39,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448036768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:39,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:39,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 15:35:39,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692732713] [2024-06-04 15:35:39,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:39,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 15:35:39,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:39,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 15:35:39,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-04 15:35:39,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-04 15:35:39,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 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) [2024-06-04 15:35:39,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:39,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-04 15:35:39,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:40,190 INFO L124 PetriNetUnfolderBase]: 1131/1722 cut-off events. [2024-06-04 15:35:40,191 INFO L125 PetriNetUnfolderBase]: For 341/355 co-relation queries the response was YES. [2024-06-04 15:35:40,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3992 conditions, 1722 events. 1131/1722 cut-off events. For 341/355 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 7884 event pairs, 589 based on Foata normal form. 13/1729 useless extension candidates. Maximal degree in co-relation 3977. Up to 1639 conditions per place. [2024-06-04 15:35:40,198 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 39 selfloop transitions, 6 changer transitions 0/50 dead transitions. [2024-06-04 15:35:40,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 50 transitions, 228 flow [2024-06-04 15:35:40,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 15:35:40,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 15:35:40,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-06-04 15:35:40,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-04 15:35:40,200 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 92 transitions. [2024-06-04 15:35:40,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 50 transitions, 228 flow [2024-06-04 15:35:40,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 50 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 15:35:40,201 INFO L231 Difference]: Finished difference. Result has 44 places, 36 transitions, 123 flow [2024-06-04 15:35:40,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=123, PETRI_PLACES=44, PETRI_TRANSITIONS=36} [2024-06-04 15:35:40,202 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2024-06-04 15:35:40,202 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 36 transitions, 123 flow [2024-06-04 15:35:40,202 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) [2024-06-04 15:35:40,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:40,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:40,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 15:35:40,203 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)] === [2024-06-04 15:35:40,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:40,204 INFO L85 PathProgramCache]: Analyzing trace with hash -813912086, now seen corresponding path program 1 times [2024-06-04 15:35:40,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:40,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179931480] [2024-06-04 15:35:40,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:40,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:40,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:40,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:40,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:40,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179931480] [2024-06-04 15:35:40,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179931480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:40,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:40,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 15:35:40,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8693285] [2024-06-04 15:35:40,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:40,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 15:35:40,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:40,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 15:35:40,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 15:35:40,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-04 15:35:40,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 36 transitions, 123 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 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) [2024-06-04 15:35:40,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:40,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-04 15:35:40,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:41,136 INFO L124 PetriNetUnfolderBase]: 888/1372 cut-off events. [2024-06-04 15:35:41,137 INFO L125 PetriNetUnfolderBase]: For 720/723 co-relation queries the response was YES. [2024-06-04 15:35:41,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3477 conditions, 1372 events. 888/1372 cut-off events. For 720/723 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6425 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. [2024-06-04 15:35:41,144 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 40 selfloop transitions, 8 changer transitions 0/54 dead transitions. [2024-06-04 15:35:41,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 54 transitions, 275 flow [2024-06-04 15:35:41,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:35:41,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:35:41,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2024-06-04 15:35:41,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-04 15:35:41,146 INFO L175 Difference]: Start difference. First operand has 44 places, 36 transitions, 123 flow. Second operand 5 states and 100 transitions. [2024-06-04 15:35:41,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 54 transitions, 275 flow [2024-06-04 15:35:41,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 258 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-04 15:35:41,149 INFO L231 Difference]: Finished difference. Result has 48 places, 42 transitions, 172 flow [2024-06-04 15:35:41,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=172, PETRI_PLACES=48, PETRI_TRANSITIONS=42} [2024-06-04 15:35:41,149 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 6 predicate places. [2024-06-04 15:35:41,150 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 42 transitions, 172 flow [2024-06-04 15:35:41,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 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) [2024-06-04 15:35:41,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:41,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:41,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 15:35:41,150 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)] === [2024-06-04 15:35:41,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:41,151 INFO L85 PathProgramCache]: Analyzing trace with hash 538530464, now seen corresponding path program 1 times [2024-06-04 15:35:41,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:41,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630988789] [2024-06-04 15:35:41,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:41,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:41,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:41,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:41,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:41,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630988789] [2024-06-04 15:35:41,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630988789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:41,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:41,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:35:41,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020999902] [2024-06-04 15:35:41,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:41,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:35:41,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:41,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:35:41,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:35:41,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-04 15:35:41,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 42 transitions, 172 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:41,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:41,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-04 15:35:41,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:42,140 INFO L124 PetriNetUnfolderBase]: 1047/1602 cut-off events. [2024-06-04 15:35:42,141 INFO L125 PetriNetUnfolderBase]: For 1527/1527 co-relation queries the response was YES. [2024-06-04 15:35:42,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4596 conditions, 1602 events. 1047/1602 cut-off events. For 1527/1527 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7557 event pairs, 479 based on Foata normal form. 4/1603 useless extension candidates. Maximal degree in co-relation 4576. Up to 1534 conditions per place. [2024-06-04 15:35:42,149 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 52 selfloop transitions, 11 changer transitions 0/68 dead transitions. [2024-06-04 15:35:42,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 68 transitions, 383 flow [2024-06-04 15:35:42,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:35:42,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:35:42,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-04 15:35:42,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-04 15:35:42,151 INFO L175 Difference]: Start difference. First operand has 48 places, 42 transitions, 172 flow. Second operand 6 states and 114 transitions. [2024-06-04 15:35:42,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 68 transitions, 383 flow [2024-06-04 15:35:42,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 68 transitions, 364 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-04 15:35:42,154 INFO L231 Difference]: Finished difference. Result has 54 places, 51 transitions, 244 flow [2024-06-04 15:35:42,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=244, PETRI_PLACES=54, PETRI_TRANSITIONS=51} [2024-06-04 15:35:42,155 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 12 predicate places. [2024-06-04 15:35:42,155 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 51 transitions, 244 flow [2024-06-04 15:35:42,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:42,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:42,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:42,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 15:35:42,156 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)] === [2024-06-04 15:35:42,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:42,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1538237355, now seen corresponding path program 1 times [2024-06-04 15:35:42,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:42,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274604507] [2024-06-04 15:35:42,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:42,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:42,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:43,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:43,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:43,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274604507] [2024-06-04 15:35:43,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274604507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:43,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:43,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:35:43,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728269064] [2024-06-04 15:35:43,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:43,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:35:43,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:43,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:35:43,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:35:43,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-04 15:35:43,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 244 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:43,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:43,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-04 15:35:43,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:43,502 INFO L124 PetriNetUnfolderBase]: 1053/1611 cut-off events. [2024-06-04 15:35:43,503 INFO L125 PetriNetUnfolderBase]: For 2521/2521 co-relation queries the response was YES. [2024-06-04 15:35:43,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5104 conditions, 1611 events. 1053/1611 cut-off events. For 2521/2521 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7666 event pairs, 461 based on Foata normal form. 4/1612 useless extension candidates. Maximal degree in co-relation 5080. Up to 1525 conditions per place. [2024-06-04 15:35:43,511 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 56 selfloop transitions, 15 changer transitions 0/76 dead transitions. [2024-06-04 15:35:43,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 76 transitions, 460 flow [2024-06-04 15:35:43,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:35:43,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:35:43,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-04 15:35:43,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45993031358885017 [2024-06-04 15:35:43,512 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 244 flow. Second operand 7 states and 132 transitions. [2024-06-04 15:35:43,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 76 transitions, 460 flow [2024-06-04 15:35:43,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 76 transitions, 454 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-04 15:35:43,516 INFO L231 Difference]: Finished difference. Result has 60 places, 55 transitions, 303 flow [2024-06-04 15:35:43,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=303, PETRI_PLACES=60, PETRI_TRANSITIONS=55} [2024-06-04 15:35:43,516 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 18 predicate places. [2024-06-04 15:35:43,517 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 55 transitions, 303 flow [2024-06-04 15:35:43,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:43,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:43,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:43,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 15:35:43,517 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)] === [2024-06-04 15:35:43,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:43,517 INFO L85 PathProgramCache]: Analyzing trace with hash 2125064731, now seen corresponding path program 1 times [2024-06-04 15:35:43,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:43,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166189419] [2024-06-04 15:35:43,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:43,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:43,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:44,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:44,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:44,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166189419] [2024-06-04 15:35:44,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166189419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:44,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:44,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:35:44,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477535235] [2024-06-04 15:35:44,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:44,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:35:44,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:44,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:35:44,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:35:44,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-04 15:35:44,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 303 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:44,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:44,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-04 15:35:44,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:44,972 INFO L124 PetriNetUnfolderBase]: 1276/1946 cut-off events. [2024-06-04 15:35:44,972 INFO L125 PetriNetUnfolderBase]: For 4880/4917 co-relation queries the response was YES. [2024-06-04 15:35:44,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6773 conditions, 1946 events. 1276/1946 cut-off events. For 4880/4917 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 9256 event pairs, 452 based on Foata normal form. 15/1911 useless extension candidates. Maximal degree in co-relation 6746. Up to 1793 conditions per place. [2024-06-04 15:35:44,982 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 47 selfloop transitions, 16 changer transitions 0/72 dead transitions. [2024-06-04 15:35:44,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 72 transitions, 489 flow [2024-06-04 15:35:44,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:35:44,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:35:44,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 99 transitions. [2024-06-04 15:35:44,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48292682926829267 [2024-06-04 15:35:44,984 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 303 flow. Second operand 5 states and 99 transitions. [2024-06-04 15:35:44,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 72 transitions, 489 flow [2024-06-04 15:35:44,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 72 transitions, 454 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-04 15:35:44,989 INFO L231 Difference]: Finished difference. Result has 60 places, 58 transitions, 343 flow [2024-06-04 15:35:44,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=343, PETRI_PLACES=60, PETRI_TRANSITIONS=58} [2024-06-04 15:35:44,992 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 18 predicate places. [2024-06-04 15:35:44,992 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 58 transitions, 343 flow [2024-06-04 15:35:44,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:44,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:44,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:44,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 15:35:44,993 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)] === [2024-06-04 15:35:44,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:44,993 INFO L85 PathProgramCache]: Analyzing trace with hash 2131744735, now seen corresponding path program 1 times [2024-06-04 15:35:44,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:44,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757852582] [2024-06-04 15:35:44,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:44,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:45,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:45,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:45,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:45,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757852582] [2024-06-04 15:35:45,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757852582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:45,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:45,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:35:45,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515952525] [2024-06-04 15:35:45,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:45,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:35:45,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:45,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:35:45,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:35:45,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-04 15:35:45,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 58 transitions, 343 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-04 15:35:45,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:45,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-04 15:35:45,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:46,359 INFO L124 PetriNetUnfolderBase]: 1112/1713 cut-off events. [2024-06-04 15:35:46,360 INFO L125 PetriNetUnfolderBase]: For 5598/5598 co-relation queries the response was YES. [2024-06-04 15:35:46,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6380 conditions, 1713 events. 1112/1713 cut-off events. For 5598/5598 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 8341 event pairs, 435 based on Foata normal form. 24/1734 useless extension candidates. Maximal degree in co-relation 6352. Up to 1489 conditions per place. [2024-06-04 15:35:46,370 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 68 selfloop transitions, 17 changer transitions 0/90 dead transitions. [2024-06-04 15:35:46,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 90 transitions, 619 flow [2024-06-04 15:35:46,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:35:46,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:35:46,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-04 15:35:46,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46646341463414637 [2024-06-04 15:35:46,372 INFO L175 Difference]: Start difference. First operand has 60 places, 58 transitions, 343 flow. Second operand 8 states and 153 transitions. [2024-06-04 15:35:46,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 90 transitions, 619 flow [2024-06-04 15:35:46,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 90 transitions, 578 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-04 15:35:46,377 INFO L231 Difference]: Finished difference. Result has 65 places, 60 transitions, 363 flow [2024-06-04 15:35:46,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=363, PETRI_PLACES=65, PETRI_TRANSITIONS=60} [2024-06-04 15:35:46,378 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 23 predicate places. [2024-06-04 15:35:46,378 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 60 transitions, 363 flow [2024-06-04 15:35:46,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-04 15:35:46,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:46,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:46,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 15:35:46,379 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)] === [2024-06-04 15:35:46,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:46,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1676523471, now seen corresponding path program 1 times [2024-06-04 15:35:46,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:46,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551536872] [2024-06-04 15:35:46,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:46,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:46,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:47,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:47,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:47,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551536872] [2024-06-04 15:35:47,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551536872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:47,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:47,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:35:47,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866555064] [2024-06-04 15:35:47,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:47,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:35:47,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:47,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:35:47,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:35:47,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:35:47,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 60 transitions, 363 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:47,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:47,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:35:47,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:47,858 INFO L124 PetriNetUnfolderBase]: 1372/2090 cut-off events. [2024-06-04 15:35:47,858 INFO L125 PetriNetUnfolderBase]: For 5728/5732 co-relation queries the response was YES. [2024-06-04 15:35:47,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7522 conditions, 2090 events. 1372/2090 cut-off events. For 5728/5732 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 9904 event pairs, 477 based on Foata normal form. 3/2088 useless extension candidates. Maximal degree in co-relation 7493. Up to 1948 conditions per place. [2024-06-04 15:35:47,879 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 66 selfloop transitions, 19 changer transitions 0/89 dead transitions. [2024-06-04 15:35:47,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 89 transitions, 659 flow [2024-06-04 15:35:47,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:35:47,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:35:47,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-04 15:35:47,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45934959349593496 [2024-06-04 15:35:47,882 INFO L175 Difference]: Start difference. First operand has 65 places, 60 transitions, 363 flow. Second operand 6 states and 113 transitions. [2024-06-04 15:35:47,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 89 transitions, 659 flow [2024-06-04 15:35:47,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 89 transitions, 626 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-04 15:35:47,890 INFO L231 Difference]: Finished difference. Result has 67 places, 69 transitions, 474 flow [2024-06-04 15:35:47,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=474, PETRI_PLACES=67, PETRI_TRANSITIONS=69} [2024-06-04 15:35:47,893 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 25 predicate places. [2024-06-04 15:35:47,893 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 69 transitions, 474 flow [2024-06-04 15:35:47,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:47,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:47,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:47,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 15:35:47,894 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:35:47,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:47,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1183686085, now seen corresponding path program 1 times [2024-06-04 15:35:47,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:47,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634719661] [2024-06-04 15:35:47,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:47,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:47,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:48,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:48,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:48,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634719661] [2024-06-04 15:35:48,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634719661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:48,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:48,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:35:48,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684953140] [2024-06-04 15:35:48,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:48,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:35:48,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:48,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:35:48,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:35:48,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:35:48,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 69 transitions, 474 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:48,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:48,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:35:48,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:48,945 INFO L124 PetriNetUnfolderBase]: 1366/2088 cut-off events. [2024-06-04 15:35:48,946 INFO L125 PetriNetUnfolderBase]: For 7246/7246 co-relation queries the response was YES. [2024-06-04 15:35:48,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7984 conditions, 2088 events. 1366/2088 cut-off events. For 7246/7246 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 9913 event pairs, 469 based on Foata normal form. 2/2088 useless extension candidates. Maximal degree in co-relation 7952. Up to 2048 conditions per place. [2024-06-04 15:35:48,956 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 73 selfloop transitions, 9 changer transitions 0/86 dead transitions. [2024-06-04 15:35:48,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 86 transitions, 716 flow [2024-06-04 15:35:48,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:35:48,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:35:48,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-04 15:35:48,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43414634146341463 [2024-06-04 15:35:48,958 INFO L175 Difference]: Start difference. First operand has 67 places, 69 transitions, 474 flow. Second operand 5 states and 89 transitions. [2024-06-04 15:35:48,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 86 transitions, 716 flow [2024-06-04 15:35:48,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 86 transitions, 696 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-06-04 15:35:48,967 INFO L231 Difference]: Finished difference. Result has 72 places, 76 transitions, 543 flow [2024-06-04 15:35:48,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=543, PETRI_PLACES=72, PETRI_TRANSITIONS=76} [2024-06-04 15:35:48,968 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 30 predicate places. [2024-06-04 15:35:48,968 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 76 transitions, 543 flow [2024-06-04 15:35:48,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:48,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:48,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:48,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 15:35:48,969 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)] === [2024-06-04 15:35:48,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:48,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1401069320, now seen corresponding path program 1 times [2024-06-04 15:35:48,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:48,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988373354] [2024-06-04 15:35:48,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:48,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:48,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:49,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:49,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:49,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988373354] [2024-06-04 15:35:49,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988373354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:49,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:49,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:35:49,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144629877] [2024-06-04 15:35:49,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:49,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:35:49,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:49,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:35:49,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:35:50,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-04 15:35:50,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 76 transitions, 543 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-04 15:35:50,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:50,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-04 15:35:50,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:50,535 INFO L124 PetriNetUnfolderBase]: 1381/2138 cut-off events. [2024-06-04 15:35:50,536 INFO L125 PetriNetUnfolderBase]: For 7921/7967 co-relation queries the response was YES. [2024-06-04 15:35:50,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8280 conditions, 2138 events. 1381/2138 cut-off events. For 7921/7967 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 10543 event pairs, 426 based on Foata normal form. 15/2103 useless extension candidates. Maximal degree in co-relation 8244. Up to 1941 conditions per place. [2024-06-04 15:35:50,549 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 78 selfloop transitions, 30 changer transitions 0/121 dead transitions. [2024-06-04 15:35:50,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 121 transitions, 974 flow [2024-06-04 15:35:50,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:35:50,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:35:50,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-04 15:35:50,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-04 15:35:50,551 INFO L175 Difference]: Start difference. First operand has 72 places, 76 transitions, 543 flow. Second operand 9 states and 164 transitions. [2024-06-04 15:35:50,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 121 transitions, 974 flow [2024-06-04 15:35:50,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 121 transitions, 968 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-04 15:35:50,558 INFO L231 Difference]: Finished difference. Result has 84 places, 93 transitions, 782 flow [2024-06-04 15:35:50,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=537, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=782, PETRI_PLACES=84, PETRI_TRANSITIONS=93} [2024-06-04 15:35:50,558 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 42 predicate places. [2024-06-04 15:35:50,558 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 93 transitions, 782 flow [2024-06-04 15:35:50,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-04 15:35:50,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:50,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:50,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 15:35:50,559 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)] === [2024-06-04 15:35:50,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:50,560 INFO L85 PathProgramCache]: Analyzing trace with hash 886855044, now seen corresponding path program 2 times [2024-06-04 15:35:50,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:50,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538363688] [2024-06-04 15:35:50,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:50,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:50,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:51,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:51,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:51,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538363688] [2024-06-04 15:35:51,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538363688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:51,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:51,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:35:51,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392995476] [2024-06-04 15:35:51,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:51,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:35:51,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:51,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:35:51,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:35:51,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-04 15:35:51,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 93 transitions, 782 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-04 15:35:51,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:51,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-04 15:35:51,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:52,056 INFO L124 PetriNetUnfolderBase]: 1392/2159 cut-off events. [2024-06-04 15:35:52,056 INFO L125 PetriNetUnfolderBase]: For 10134/10209 co-relation queries the response was YES. [2024-06-04 15:35:52,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8912 conditions, 2159 events. 1392/2159 cut-off events. For 10134/10209 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 10594 event pairs, 323 based on Foata normal form. 25/2123 useless extension candidates. Maximal degree in co-relation 8869. Up to 1902 conditions per place. [2024-06-04 15:35:52,072 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 68 selfloop transitions, 30 changer transitions 0/111 dead transitions. [2024-06-04 15:35:52,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 111 transitions, 1034 flow [2024-06-04 15:35:52,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:35:52,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:35:52,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-04 15:35:52,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-04 15:35:52,074 INFO L175 Difference]: Start difference. First operand has 84 places, 93 transitions, 782 flow. Second operand 6 states and 114 transitions. [2024-06-04 15:35:52,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 111 transitions, 1034 flow [2024-06-04 15:35:52,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 111 transitions, 969 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-04 15:35:52,083 INFO L231 Difference]: Finished difference. Result has 87 places, 95 transitions, 807 flow [2024-06-04 15:35:52,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=717, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=807, PETRI_PLACES=87, PETRI_TRANSITIONS=95} [2024-06-04 15:35:52,084 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 45 predicate places. [2024-06-04 15:35:52,084 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 95 transitions, 807 flow [2024-06-04 15:35:52,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-04 15:35:52,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:52,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:52,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 15:35:52,085 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)] === [2024-06-04 15:35:52,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:52,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1295660676, now seen corresponding path program 3 times [2024-06-04 15:35:52,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:52,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379380890] [2024-06-04 15:35:52,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:52,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:52,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:53,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:53,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:53,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379380890] [2024-06-04 15:35:53,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379380890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:53,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:53,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:35:53,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4712241] [2024-06-04 15:35:53,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:53,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:35:53,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:53,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:35:53,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:35:53,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-04 15:35:53,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 95 transitions, 807 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-04 15:35:53,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:53,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-04 15:35:53,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:53,598 INFO L124 PetriNetUnfolderBase]: 1375/2131 cut-off events. [2024-06-04 15:35:53,598 INFO L125 PetriNetUnfolderBase]: For 11809/11903 co-relation queries the response was YES. [2024-06-04 15:35:53,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9122 conditions, 2131 events. 1375/2131 cut-off events. For 11809/11903 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 10488 event pairs, 401 based on Foata normal form. 16/2093 useless extension candidates. Maximal degree in co-relation 9078. Up to 1893 conditions per place. [2024-06-04 15:35:53,610 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 67 selfloop transitions, 34 changer transitions 0/114 dead transitions. [2024-06-04 15:35:53,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 114 transitions, 1079 flow [2024-06-04 15:35:53,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:35:53,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:35:53,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-04 15:35:53,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-04 15:35:53,612 INFO L175 Difference]: Start difference. First operand has 87 places, 95 transitions, 807 flow. Second operand 6 states and 116 transitions. [2024-06-04 15:35:53,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 114 transitions, 1079 flow [2024-06-04 15:35:53,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 114 transitions, 1005 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-04 15:35:53,621 INFO L231 Difference]: Finished difference. Result has 89 places, 97 transitions, 835 flow [2024-06-04 15:35:53,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=737, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=835, PETRI_PLACES=89, PETRI_TRANSITIONS=97} [2024-06-04 15:35:53,622 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-06-04 15:35:53,622 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 97 transitions, 835 flow [2024-06-04 15:35:53,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-04 15:35:53,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:53,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:53,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 15:35:53,622 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)] === [2024-06-04 15:35:53,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:53,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1295655716, now seen corresponding path program 1 times [2024-06-04 15:35:53,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:53,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599042150] [2024-06-04 15:35:53,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:53,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:53,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:54,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:54,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:54,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599042150] [2024-06-04 15:35:54,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599042150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:54,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:54,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:35:54,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478142941] [2024-06-04 15:35:54,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:54,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:35:54,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:54,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:35:54,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:35:54,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:35:54,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 97 transitions, 835 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:54,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:54,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:35:54,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:55,578 INFO L124 PetriNetUnfolderBase]: 1529/2350 cut-off events. [2024-06-04 15:35:55,578 INFO L125 PetriNetUnfolderBase]: For 11001/11005 co-relation queries the response was YES. [2024-06-04 15:35:55,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10043 conditions, 2350 events. 1529/2350 cut-off events. For 11001/11005 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11266 event pairs, 437 based on Foata normal form. 6/2354 useless extension candidates. Maximal degree in co-relation 9998. Up to 2214 conditions per place. [2024-06-04 15:35:55,592 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 113 selfloop transitions, 38 changer transitions 0/155 dead transitions. [2024-06-04 15:35:55,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 155 transitions, 1475 flow [2024-06-04 15:35:55,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:35:55,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:35:55,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-04 15:35:55,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43414634146341463 [2024-06-04 15:35:55,594 INFO L175 Difference]: Start difference. First operand has 89 places, 97 transitions, 835 flow. Second operand 10 states and 178 transitions. [2024-06-04 15:35:55,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 155 transitions, 1475 flow [2024-06-04 15:35:55,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 155 transitions, 1384 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-04 15:35:55,608 INFO L231 Difference]: Finished difference. Result has 100 places, 122 transitions, 1142 flow [2024-06-04 15:35:55,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=761, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1142, PETRI_PLACES=100, PETRI_TRANSITIONS=122} [2024-06-04 15:35:55,609 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 58 predicate places. [2024-06-04 15:35:55,609 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 122 transitions, 1142 flow [2024-06-04 15:35:55,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:55,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:55,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:55,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 15:35:55,610 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)] === [2024-06-04 15:35:55,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:55,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1398207400, now seen corresponding path program 2 times [2024-06-04 15:35:55,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:55,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850001285] [2024-06-04 15:35:55,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:55,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:55,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:56,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:56,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:56,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850001285] [2024-06-04 15:35:56,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850001285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:56,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:56,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:35:56,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433010997] [2024-06-04 15:35:56,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:56,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:35:56,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:56,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:35:56,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:35:56,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:35:56,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 122 transitions, 1142 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:56,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:56,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:35:56,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:57,266 INFO L124 PetriNetUnfolderBase]: 1540/2369 cut-off events. [2024-06-04 15:35:57,266 INFO L125 PetriNetUnfolderBase]: For 13150/13152 co-relation queries the response was YES. [2024-06-04 15:35:57,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10719 conditions, 2369 events. 1540/2369 cut-off events. For 13150/13152 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11363 event pairs, 438 based on Foata normal form. 2/2362 useless extension candidates. Maximal degree in co-relation 10668. Up to 2118 conditions per place. [2024-06-04 15:35:57,280 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 100 selfloop transitions, 50 changer transitions 0/154 dead transitions. [2024-06-04 15:35:57,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 154 transitions, 1602 flow [2024-06-04 15:35:57,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:35:57,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:35:57,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-04 15:35:57,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564459930313589 [2024-06-04 15:35:57,281 INFO L175 Difference]: Start difference. First operand has 100 places, 122 transitions, 1142 flow. Second operand 7 states and 131 transitions. [2024-06-04 15:35:57,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 154 transitions, 1602 flow [2024-06-04 15:35:57,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 154 transitions, 1505 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-04 15:35:57,302 INFO L231 Difference]: Finished difference. Result has 106 places, 133 transitions, 1305 flow [2024-06-04 15:35:57,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1045, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1305, PETRI_PLACES=106, PETRI_TRANSITIONS=133} [2024-06-04 15:35:57,303 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 64 predicate places. [2024-06-04 15:35:57,303 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 133 transitions, 1305 flow [2024-06-04 15:35:57,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:57,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:57,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:57,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 15:35:57,304 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)] === [2024-06-04 15:35:57,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:57,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1755768958, now seen corresponding path program 3 times [2024-06-04 15:35:57,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:57,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115967836] [2024-06-04 15:35:57,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:57,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:57,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:58,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:58,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:58,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115967836] [2024-06-04 15:35:58,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115967836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:58,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:58,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:35:58,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507410685] [2024-06-04 15:35:58,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:58,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:35:58,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:58,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:35:58,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:35:58,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:35:58,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 133 transitions, 1305 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:58,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:58,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:35:58,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:59,294 INFO L124 PetriNetUnfolderBase]: 1546/2381 cut-off events. [2024-06-04 15:35:59,294 INFO L125 PetriNetUnfolderBase]: For 15865/15874 co-relation queries the response was YES. [2024-06-04 15:35:59,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11461 conditions, 2381 events. 1546/2381 cut-off events. For 15865/15874 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11552 event pairs, 426 based on Foata normal form. 8/2384 useless extension candidates. Maximal degree in co-relation 11407. Up to 2180 conditions per place. [2024-06-04 15:35:59,309 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 130 selfloop transitions, 36 changer transitions 0/170 dead transitions. [2024-06-04 15:35:59,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 170 transitions, 1809 flow [2024-06-04 15:35:59,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:35:59,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:35:59,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-04 15:35:59,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-04 15:35:59,311 INFO L175 Difference]: Start difference. First operand has 106 places, 133 transitions, 1305 flow. Second operand 9 states and 162 transitions. [2024-06-04 15:35:59,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 170 transitions, 1809 flow [2024-06-04 15:35:59,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 170 transitions, 1697 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-04 15:35:59,335 INFO L231 Difference]: Finished difference. Result has 111 places, 139 transitions, 1345 flow [2024-06-04 15:35:59,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1202, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1345, PETRI_PLACES=111, PETRI_TRANSITIONS=139} [2024-06-04 15:35:59,336 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 69 predicate places. [2024-06-04 15:35:59,336 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 139 transitions, 1345 flow [2024-06-04 15:35:59,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:59,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:59,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:59,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 15:35:59,337 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:35:59,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:59,337 INFO L85 PathProgramCache]: Analyzing trace with hash -690512720, now seen corresponding path program 1 times [2024-06-04 15:35:59,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:59,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798713311] [2024-06-04 15:35:59,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:59,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:59,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:00,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:00,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:00,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798713311] [2024-06-04 15:36:00,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798713311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:00,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:00,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:36:00,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120003497] [2024-06-04 15:36:00,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:00,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:36:00,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:00,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:36:00,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:36:00,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:36:00,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 139 transitions, 1345 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:00,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:00,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:36:00,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:00,996 INFO L124 PetriNetUnfolderBase]: 1588/2444 cut-off events. [2024-06-04 15:36:00,996 INFO L125 PetriNetUnfolderBase]: For 16219/16221 co-relation queries the response was YES. [2024-06-04 15:36:01,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11744 conditions, 2444 events. 1588/2444 cut-off events. For 16219/16221 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 11899 event pairs, 391 based on Foata normal form. 4/2439 useless extension candidates. Maximal degree in co-relation 11688. Up to 2104 conditions per place. [2024-06-04 15:36:01,009 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 114 selfloop transitions, 50 changer transitions 0/168 dead transitions. [2024-06-04 15:36:01,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 168 transitions, 1823 flow [2024-06-04 15:36:01,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:36:01,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:36:01,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-04 15:36:01,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564459930313589 [2024-06-04 15:36:01,011 INFO L175 Difference]: Start difference. First operand has 111 places, 139 transitions, 1345 flow. Second operand 7 states and 131 transitions. [2024-06-04 15:36:01,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 168 transitions, 1823 flow [2024-06-04 15:36:01,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 168 transitions, 1731 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-04 15:36:01,032 INFO L231 Difference]: Finished difference. Result has 113 places, 145 transitions, 1421 flow [2024-06-04 15:36:01,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1253, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1421, PETRI_PLACES=113, PETRI_TRANSITIONS=145} [2024-06-04 15:36:01,033 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 71 predicate places. [2024-06-04 15:36:01,033 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 145 transitions, 1421 flow [2024-06-04 15:36:01,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:01,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:01,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:01,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 15:36:01,034 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)] === [2024-06-04 15:36:01,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:01,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1578879214, now seen corresponding path program 2 times [2024-06-04 15:36:01,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:01,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952379471] [2024-06-04 15:36:01,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:01,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:01,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:02,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:02,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:02,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952379471] [2024-06-04 15:36:02,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952379471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:02,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:02,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:36:02,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736913386] [2024-06-04 15:36:02,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:02,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:36:02,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:02,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:36:02,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:36:02,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:36:02,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 145 transitions, 1421 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:02,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:02,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:36:02,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:02,678 INFO L124 PetriNetUnfolderBase]: 1580/2432 cut-off events. [2024-06-04 15:36:02,678 INFO L125 PetriNetUnfolderBase]: For 18314/18316 co-relation queries the response was YES. [2024-06-04 15:36:02,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12074 conditions, 2432 events. 1580/2432 cut-off events. For 18314/18316 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 11768 event pairs, 403 based on Foata normal form. 4/2427 useless extension candidates. Maximal degree in co-relation 12016. Up to 2149 conditions per place. [2024-06-04 15:36:02,694 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 112 selfloop transitions, 51 changer transitions 0/167 dead transitions. [2024-06-04 15:36:02,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 167 transitions, 1826 flow [2024-06-04 15:36:02,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:36:02,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:36:02,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-04 15:36:02,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-04 15:36:02,695 INFO L175 Difference]: Start difference. First operand has 113 places, 145 transitions, 1421 flow. Second operand 7 states and 129 transitions. [2024-06-04 15:36:02,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 167 transitions, 1826 flow [2024-06-04 15:36:02,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 167 transitions, 1704 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-04 15:36:02,723 INFO L231 Difference]: Finished difference. Result has 116 places, 146 transitions, 1429 flow [2024-06-04 15:36:02,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1307, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1429, PETRI_PLACES=116, PETRI_TRANSITIONS=146} [2024-06-04 15:36:02,724 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 74 predicate places. [2024-06-04 15:36:02,724 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 146 transitions, 1429 flow [2024-06-04 15:36:02,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:02,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:02,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:02,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 15:36:02,725 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)] === [2024-06-04 15:36:02,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:02,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1667592844, now seen corresponding path program 3 times [2024-06-04 15:36:02,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:02,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009093898] [2024-06-04 15:36:02,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:02,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:02,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:03,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:03,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:03,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009093898] [2024-06-04 15:36:03,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009093898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:03,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:03,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:36:03,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589950743] [2024-06-04 15:36:03,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:03,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:36:03,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:03,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:36:03,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:36:03,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:36:03,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 146 transitions, 1429 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:03,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:03,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:36:03,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:04,188 INFO L124 PetriNetUnfolderBase]: 1572/2420 cut-off events. [2024-06-04 15:36:04,188 INFO L125 PetriNetUnfolderBase]: For 19558/19560 co-relation queries the response was YES. [2024-06-04 15:36:04,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12094 conditions, 2420 events. 1572/2420 cut-off events. For 19558/19560 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11685 event pairs, 265 based on Foata normal form. 4/2415 useless extension candidates. Maximal degree in co-relation 12035. Up to 2168 conditions per place. [2024-06-04 15:36:04,237 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 140 selfloop transitions, 31 changer transitions 0/175 dead transitions. [2024-06-04 15:36:04,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 175 transitions, 1903 flow [2024-06-04 15:36:04,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:36:04,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:36:04,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-04 15:36:04,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355400696864111 [2024-06-04 15:36:04,238 INFO L175 Difference]: Start difference. First operand has 116 places, 146 transitions, 1429 flow. Second operand 7 states and 125 transitions. [2024-06-04 15:36:04,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 175 transitions, 1903 flow [2024-06-04 15:36:04,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 175 transitions, 1808 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-04 15:36:04,294 INFO L231 Difference]: Finished difference. Result has 120 places, 154 transitions, 1502 flow [2024-06-04 15:36:04,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1334, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1502, PETRI_PLACES=120, PETRI_TRANSITIONS=154} [2024-06-04 15:36:04,294 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 78 predicate places. [2024-06-04 15:36:04,295 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 154 transitions, 1502 flow [2024-06-04 15:36:04,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:04,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:04,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:04,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 15:36:04,296 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)] === [2024-06-04 15:36:04,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:04,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1578873262, now seen corresponding path program 1 times [2024-06-04 15:36:04,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:04,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179246752] [2024-06-04 15:36:04,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:04,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:04,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:05,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:05,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:05,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179246752] [2024-06-04 15:36:05,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179246752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:05,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:05,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:36:05,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504286342] [2024-06-04 15:36:05,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:05,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:36:05,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:05,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:36:05,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:36:05,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:36:05,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 154 transitions, 1502 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:05,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:05,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:36:05,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:06,199 INFO L124 PetriNetUnfolderBase]: 1630/2528 cut-off events. [2024-06-04 15:36:06,199 INFO L125 PetriNetUnfolderBase]: For 23334/23336 co-relation queries the response was YES. [2024-06-04 15:36:06,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12802 conditions, 2528 events. 1630/2528 cut-off events. For 23334/23336 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 12520 event pairs, 354 based on Foata normal form. 16/2535 useless extension candidates. Maximal degree in co-relation 12740. Up to 2119 conditions per place. [2024-06-04 15:36:06,215 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 129 selfloop transitions, 53 changer transitions 0/186 dead transitions. [2024-06-04 15:36:06,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 186 transitions, 1996 flow [2024-06-04 15:36:06,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:36:06,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:36:06,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-04 15:36:06,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603658536585366 [2024-06-04 15:36:06,217 INFO L175 Difference]: Start difference. First operand has 120 places, 154 transitions, 1502 flow. Second operand 8 states and 151 transitions. [2024-06-04 15:36:06,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 186 transitions, 1996 flow [2024-06-04 15:36:06,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 186 transitions, 1938 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-04 15:36:06,256 INFO L231 Difference]: Finished difference. Result has 126 places, 156 transitions, 1588 flow [2024-06-04 15:36:06,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1444, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1588, PETRI_PLACES=126, PETRI_TRANSITIONS=156} [2024-06-04 15:36:06,256 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 84 predicate places. [2024-06-04 15:36:06,257 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 156 transitions, 1588 flow [2024-06-04 15:36:06,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:06,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:06,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:06,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 15:36:06,257 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)] === [2024-06-04 15:36:06,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:06,258 INFO L85 PathProgramCache]: Analyzing trace with hash 2000724638, now seen corresponding path program 2 times [2024-06-04 15:36:06,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:06,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827608544] [2024-06-04 15:36:06,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:06,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:06,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:07,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:07,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:07,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827608544] [2024-06-04 15:36:07,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827608544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:07,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:07,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:36:07,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240036174] [2024-06-04 15:36:07,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:07,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:36:07,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:07,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:36:07,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:36:07,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:36:07,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 156 transitions, 1588 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:07,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:07,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:36:07,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:08,342 INFO L124 PetriNetUnfolderBase]: 1732/2705 cut-off events. [2024-06-04 15:36:08,342 INFO L125 PetriNetUnfolderBase]: For 26544/26553 co-relation queries the response was YES. [2024-06-04 15:36:08,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14031 conditions, 2705 events. 1732/2705 cut-off events. For 26544/26553 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 13677 event pairs, 377 based on Foata normal form. 18/2718 useless extension candidates. Maximal degree in co-relation 13967. Up to 2126 conditions per place. [2024-06-04 15:36:08,363 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 156 selfloop transitions, 40 changer transitions 0/200 dead transitions. [2024-06-04 15:36:08,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 200 transitions, 2235 flow [2024-06-04 15:36:08,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:36:08,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:36:08,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-04 15:36:08,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-04 15:36:08,365 INFO L175 Difference]: Start difference. First operand has 126 places, 156 transitions, 1588 flow. Second operand 9 states and 170 transitions. [2024-06-04 15:36:08,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 200 transitions, 2235 flow [2024-06-04 15:36:08,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 200 transitions, 2131 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-04 15:36:08,412 INFO L231 Difference]: Finished difference. Result has 129 places, 158 transitions, 1604 flow [2024-06-04 15:36:08,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1484, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1604, PETRI_PLACES=129, PETRI_TRANSITIONS=158} [2024-06-04 15:36:08,413 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 87 predicate places. [2024-06-04 15:36:08,413 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 158 transitions, 1604 flow [2024-06-04 15:36:08,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:08,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:08,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:08,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 15:36:08,414 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)] === [2024-06-04 15:36:08,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:08,414 INFO L85 PathProgramCache]: Analyzing trace with hash 646888032, now seen corresponding path program 3 times [2024-06-04 15:36:08,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:08,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180342657] [2024-06-04 15:36:08,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:08,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:08,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:09,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:09,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:09,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180342657] [2024-06-04 15:36:09,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180342657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:09,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:09,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:36:09,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701037243] [2024-06-04 15:36:09,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:09,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:36:09,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:09,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:36:09,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:36:09,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:36:09,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 158 transitions, 1604 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:09,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:09,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:36:09,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:10,158 INFO L124 PetriNetUnfolderBase]: 1704/2658 cut-off events. [2024-06-04 15:36:10,159 INFO L125 PetriNetUnfolderBase]: For 28218/28220 co-relation queries the response was YES. [2024-06-04 15:36:10,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13752 conditions, 2658 events. 1704/2658 cut-off events. For 28218/28220 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13323 event pairs, 424 based on Foata normal form. 16/2665 useless extension candidates. Maximal degree in co-relation 13687. Up to 2255 conditions per place. [2024-06-04 15:36:10,177 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 123 selfloop transitions, 64 changer transitions 0/191 dead transitions. [2024-06-04 15:36:10,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 191 transitions, 2094 flow [2024-06-04 15:36:10,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:36:10,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:36:10,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-04 15:36:10,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-04 15:36:10,179 INFO L175 Difference]: Start difference. First operand has 129 places, 158 transitions, 1604 flow. Second operand 9 states and 165 transitions. [2024-06-04 15:36:10,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 191 transitions, 2094 flow [2024-06-04 15:36:10,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 191 transitions, 2040 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-04 15:36:10,216 INFO L231 Difference]: Finished difference. Result has 133 places, 158 transitions, 1685 flow [2024-06-04 15:36:10,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1550, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1685, PETRI_PLACES=133, PETRI_TRANSITIONS=158} [2024-06-04 15:36:10,217 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 91 predicate places. [2024-06-04 15:36:10,217 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 158 transitions, 1685 flow [2024-06-04 15:36:10,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:10,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:10,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:10,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 15:36:10,218 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:10,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:10,218 INFO L85 PathProgramCache]: Analyzing trace with hash -2117327876, now seen corresponding path program 1 times [2024-06-04 15:36:10,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:10,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863670438] [2024-06-04 15:36:10,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:10,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:10,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:10,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:10,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:10,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863670438] [2024-06-04 15:36:10,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863670438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:10,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:10,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:36:10,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799218040] [2024-06-04 15:36:10,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:10,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:36:10,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:10,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:36:10,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:36:10,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:36:10,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 158 transitions, 1685 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) [2024-06-04 15:36:10,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:10,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:36:10,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:11,466 INFO L124 PetriNetUnfolderBase]: 1724/2690 cut-off events. [2024-06-04 15:36:11,467 INFO L125 PetriNetUnfolderBase]: For 29526/29528 co-relation queries the response was YES. [2024-06-04 15:36:11,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14209 conditions, 2690 events. 1724/2690 cut-off events. For 29526/29528 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 13548 event pairs, 427 based on Foata normal form. 4/2685 useless extension candidates. Maximal degree in co-relation 14142. Up to 2512 conditions per place. [2024-06-04 15:36:11,485 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 131 selfloop transitions, 35 changer transitions 0/170 dead transitions. [2024-06-04 15:36:11,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 170 transitions, 2075 flow [2024-06-04 15:36:11,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:36:11,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:36:11,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2024-06-04 15:36:11,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45365853658536587 [2024-06-04 15:36:11,486 INFO L175 Difference]: Start difference. First operand has 133 places, 158 transitions, 1685 flow. Second operand 5 states and 93 transitions. [2024-06-04 15:36:11,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 170 transitions, 2075 flow [2024-06-04 15:36:11,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 170 transitions, 1932 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-04 15:36:11,530 INFO L231 Difference]: Finished difference. Result has 130 places, 161 transitions, 1657 flow [2024-06-04 15:36:11,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1542, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1657, PETRI_PLACES=130, PETRI_TRANSITIONS=161} [2024-06-04 15:36:11,530 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 88 predicate places. [2024-06-04 15:36:11,530 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 161 transitions, 1657 flow [2024-06-04 15:36:11,531 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) [2024-06-04 15:36:11,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:11,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:11,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 15:36:11,531 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:11,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:11,531 INFO L85 PathProgramCache]: Analyzing trace with hash 198965240, now seen corresponding path program 2 times [2024-06-04 15:36:11,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:11,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222973846] [2024-06-04 15:36:11,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:11,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:11,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:12,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:12,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:12,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222973846] [2024-06-04 15:36:12,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222973846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:12,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:12,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:36:12,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587438223] [2024-06-04 15:36:12,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:12,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:36:12,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:12,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:36:12,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:36:12,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:36:12,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 161 transitions, 1657 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) [2024-06-04 15:36:12,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:12,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:36:12,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:12,839 INFO L124 PetriNetUnfolderBase]: 1712/2674 cut-off events. [2024-06-04 15:36:12,840 INFO L125 PetriNetUnfolderBase]: For 31092/31094 co-relation queries the response was YES. [2024-06-04 15:36:12,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14258 conditions, 2674 events. 1712/2674 cut-off events. For 31092/31094 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13496 event pairs, 425 based on Foata normal form. 4/2669 useless extension candidates. Maximal degree in co-relation 14190. Up to 2480 conditions per place. [2024-06-04 15:36:12,878 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 134 selfloop transitions, 38 changer transitions 0/176 dead transitions. [2024-06-04 15:36:12,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 176 transitions, 2079 flow [2024-06-04 15:36:12,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:36:12,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:36:12,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-04 15:36:12,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-04 15:36:12,880 INFO L175 Difference]: Start difference. First operand has 130 places, 161 transitions, 1657 flow. Second operand 6 states and 108 transitions. [2024-06-04 15:36:12,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 176 transitions, 2079 flow [2024-06-04 15:36:12,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 176 transitions, 1996 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-04 15:36:12,931 INFO L231 Difference]: Finished difference. Result has 133 places, 164 transitions, 1694 flow [2024-06-04 15:36:12,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1578, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1694, PETRI_PLACES=133, PETRI_TRANSITIONS=164} [2024-06-04 15:36:12,931 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 91 predicate places. [2024-06-04 15:36:12,932 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 164 transitions, 1694 flow [2024-06-04 15:36:12,932 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) [2024-06-04 15:36:12,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:12,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:12,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 15:36:12,932 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:12,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:12,933 INFO L85 PathProgramCache]: Analyzing trace with hash -955240478, now seen corresponding path program 1 times [2024-06-04 15:36:12,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:12,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393917837] [2024-06-04 15:36:12,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:12,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:12,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:13,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:13,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:13,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393917837] [2024-06-04 15:36:13,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393917837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:13,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:13,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:36:13,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535505852] [2024-06-04 15:36:13,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:13,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:36:13,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:13,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:36:13,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:36:13,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-04 15:36:13,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 164 transitions, 1694 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:13,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:13,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-04 15:36:13,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:14,064 INFO L124 PetriNetUnfolderBase]: 1625/2589 cut-off events. [2024-06-04 15:36:14,065 INFO L125 PetriNetUnfolderBase]: For 31840/31851 co-relation queries the response was YES. [2024-06-04 15:36:14,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14182 conditions, 2589 events. 1625/2589 cut-off events. For 31840/31851 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13226 event pairs, 406 based on Foata normal form. 9/2586 useless extension candidates. Maximal degree in co-relation 14113. Up to 2377 conditions per place. [2024-06-04 15:36:14,082 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 144 selfloop transitions, 38 changer transitions 0/191 dead transitions. [2024-06-04 15:36:14,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 191 transitions, 2262 flow [2024-06-04 15:36:14,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:36:14,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:36:14,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-04 15:36:14,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45993031358885017 [2024-06-04 15:36:14,083 INFO L175 Difference]: Start difference. First operand has 133 places, 164 transitions, 1694 flow. Second operand 7 states and 132 transitions. [2024-06-04 15:36:14,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 191 transitions, 2262 flow [2024-06-04 15:36:14,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 191 transitions, 2170 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-04 15:36:14,128 INFO L231 Difference]: Finished difference. Result has 136 places, 170 transitions, 1768 flow [2024-06-04 15:36:14,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1602, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1768, PETRI_PLACES=136, PETRI_TRANSITIONS=170} [2024-06-04 15:36:14,129 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 94 predicate places. [2024-06-04 15:36:14,129 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 170 transitions, 1768 flow [2024-06-04 15:36:14,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:14,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:14,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:14,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 15:36:14,129 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:14,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:14,130 INFO L85 PathProgramCache]: Analyzing trace with hash -955120322, now seen corresponding path program 1 times [2024-06-04 15:36:14,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:14,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994731566] [2024-06-04 15:36:14,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:14,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:14,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:14,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:14,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:14,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994731566] [2024-06-04 15:36:14,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994731566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:14,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:14,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:36:14,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264598119] [2024-06-04 15:36:14,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:14,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:36:14,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:14,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:36:14,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:36:14,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:36:14,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 170 transitions, 1768 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) [2024-06-04 15:36:14,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:14,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:36:14,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:15,275 INFO L124 PetriNetUnfolderBase]: 1758/2736 cut-off events. [2024-06-04 15:36:15,275 INFO L125 PetriNetUnfolderBase]: For 35419/35421 co-relation queries the response was YES. [2024-06-04 15:36:15,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15086 conditions, 2736 events. 1758/2736 cut-off events. For 35419/35421 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 13779 event pairs, 444 based on Foata normal form. 2/2736 useless extension candidates. Maximal degree in co-relation 15016. Up to 2637 conditions per place. [2024-06-04 15:36:15,292 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 175 selfloop transitions, 22 changer transitions 0/201 dead transitions. [2024-06-04 15:36:15,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 201 transitions, 2363 flow [2024-06-04 15:36:15,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:36:15,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:36:15,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-04 15:36:15,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-04 15:36:15,294 INFO L175 Difference]: Start difference. First operand has 136 places, 170 transitions, 1768 flow. Second operand 7 states and 123 transitions. [2024-06-04 15:36:15,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 201 transitions, 2363 flow [2024-06-04 15:36:15,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 201 transitions, 2296 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-04 15:36:15,343 INFO L231 Difference]: Finished difference. Result has 143 places, 185 transitions, 1909 flow [2024-06-04 15:36:15,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1706, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1909, PETRI_PLACES=143, PETRI_TRANSITIONS=185} [2024-06-04 15:36:15,344 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 101 predicate places. [2024-06-04 15:36:15,344 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 185 transitions, 1909 flow [2024-06-04 15:36:15,344 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) [2024-06-04 15:36:15,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:15,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:15,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 15:36:15,345 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:15,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:15,345 INFO L85 PathProgramCache]: Analyzing trace with hash 466676354, now seen corresponding path program 2 times [2024-06-04 15:36:15,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:15,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600285466] [2024-06-04 15:36:15,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:15,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:15,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:15,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:15,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:15,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600285466] [2024-06-04 15:36:15,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600285466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:15,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:15,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:36:15,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123852342] [2024-06-04 15:36:15,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:15,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:36:15,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:15,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:36:15,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:36:16,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-04 15:36:16,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 185 transitions, 1909 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:16,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:16,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-04 15:36:16,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:16,556 INFO L124 PetriNetUnfolderBase]: 1695/2686 cut-off events. [2024-06-04 15:36:16,556 INFO L125 PetriNetUnfolderBase]: For 38546/38555 co-relation queries the response was YES. [2024-06-04 15:36:16,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15406 conditions, 2686 events. 1695/2686 cut-off events. For 38546/38555 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 13691 event pairs, 404 based on Foata normal form. 9/2687 useless extension candidates. Maximal degree in co-relation 15331. Up to 2483 conditions per place. [2024-06-04 15:36:16,574 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 158 selfloop transitions, 37 changer transitions 0/208 dead transitions. [2024-06-04 15:36:16,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 208 transitions, 2454 flow [2024-06-04 15:36:16,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:36:16,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:36:16,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-04 15:36:16,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425087108013937 [2024-06-04 15:36:16,575 INFO L175 Difference]: Start difference. First operand has 143 places, 185 transitions, 1909 flow. Second operand 7 states and 127 transitions. [2024-06-04 15:36:16,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 208 transitions, 2454 flow [2024-06-04 15:36:16,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 208 transitions, 2434 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-06-04 15:36:16,631 INFO L231 Difference]: Finished difference. Result has 149 places, 191 transitions, 2051 flow [2024-06-04 15:36:16,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1889, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2051, PETRI_PLACES=149, PETRI_TRANSITIONS=191} [2024-06-04 15:36:16,632 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 107 predicate places. [2024-06-04 15:36:16,632 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 191 transitions, 2051 flow [2024-06-04 15:36:16,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:16,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:16,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:16,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-04 15:36:16,632 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:16,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:16,633 INFO L85 PathProgramCache]: Analyzing trace with hash 198734042, now seen corresponding path program 2 times [2024-06-04 15:36:16,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:16,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197861065] [2024-06-04 15:36:16,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:16,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:16,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:17,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:17,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:17,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197861065] [2024-06-04 15:36:17,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197861065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:17,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:17,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:36:17,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212011696] [2024-06-04 15:36:17,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:17,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:36:17,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:17,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:36:17,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:36:17,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:36:17,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 191 transitions, 2051 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) [2024-06-04 15:36:17,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:17,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:36:17,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:17,727 INFO L124 PetriNetUnfolderBase]: 1793/2789 cut-off events. [2024-06-04 15:36:17,727 INFO L125 PetriNetUnfolderBase]: For 41959/41961 co-relation queries the response was YES. [2024-06-04 15:36:17,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16180 conditions, 2789 events. 1793/2789 cut-off events. For 41959/41961 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 14061 event pairs, 445 based on Foata normal form. 2/2789 useless extension candidates. Maximal degree in co-relation 16102. Up to 2682 conditions per place. [2024-06-04 15:36:17,750 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 180 selfloop transitions, 25 changer transitions 0/209 dead transitions. [2024-06-04 15:36:17,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 209 transitions, 2581 flow [2024-06-04 15:36:17,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:36:17,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:36:17,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-04 15:36:17,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-04 15:36:17,752 INFO L175 Difference]: Start difference. First operand has 149 places, 191 transitions, 2051 flow. Second operand 6 states and 110 transitions. [2024-06-04 15:36:17,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 209 transitions, 2581 flow [2024-06-04 15:36:17,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 209 transitions, 2478 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-04 15:36:17,830 INFO L231 Difference]: Finished difference. Result has 152 places, 195 transitions, 2058 flow [2024-06-04 15:36:17,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1952, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2058, PETRI_PLACES=152, PETRI_TRANSITIONS=195} [2024-06-04 15:36:17,831 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 110 predicate places. [2024-06-04 15:36:17,831 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 195 transitions, 2058 flow [2024-06-04 15:36:17,831 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) [2024-06-04 15:36:17,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:17,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:17,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-04 15:36:17,831 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:17,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:17,832 INFO L85 PathProgramCache]: Analyzing trace with hash 198971192, now seen corresponding path program 3 times [2024-06-04 15:36:17,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:17,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658459886] [2024-06-04 15:36:17,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:17,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:17,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:18,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:18,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:18,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658459886] [2024-06-04 15:36:18,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658459886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:18,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:18,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:36:18,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186142146] [2024-06-04 15:36:18,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:18,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:36:18,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:18,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:36:18,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:36:18,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:36:18,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 195 transitions, 2058 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) [2024-06-04 15:36:18,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:18,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:36:18,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:18,992 INFO L124 PetriNetUnfolderBase]: 1787/2779 cut-off events. [2024-06-04 15:36:18,992 INFO L125 PetriNetUnfolderBase]: For 44124/44126 co-relation queries the response was YES. [2024-06-04 15:36:19,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16193 conditions, 2779 events. 1787/2779 cut-off events. For 44124/44126 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 13964 event pairs, 445 based on Foata normal form. 2/2779 useless extension candidates. Maximal degree in co-relation 16113. Up to 2704 conditions per place. [2024-06-04 15:36:19,015 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 187 selfloop transitions, 14 changer transitions 0/205 dead transitions. [2024-06-04 15:36:19,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 205 transitions, 2494 flow [2024-06-04 15:36:19,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:36:19,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:36:19,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-04 15:36:19,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-04 15:36:19,017 INFO L175 Difference]: Start difference. First operand has 152 places, 195 transitions, 2058 flow. Second operand 6 states and 102 transitions. [2024-06-04 15:36:19,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 205 transitions, 2494 flow [2024-06-04 15:36:19,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 205 transitions, 2439 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-04 15:36:19,091 INFO L231 Difference]: Finished difference. Result has 154 places, 196 transitions, 2047 flow [2024-06-04 15:36:19,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2004, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2047, PETRI_PLACES=154, PETRI_TRANSITIONS=196} [2024-06-04 15:36:19,096 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 112 predicate places. [2024-06-04 15:36:19,096 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 196 transitions, 2047 flow [2024-06-04 15:36:19,097 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) [2024-06-04 15:36:19,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:19,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:19,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-04 15:36:19,097 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:19,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:19,097 INFO L85 PathProgramCache]: Analyzing trace with hash -549194108, now seen corresponding path program 3 times [2024-06-04 15:36:19,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:19,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781187405] [2024-06-04 15:36:19,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:19,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:19,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:19,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:19,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:19,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781187405] [2024-06-04 15:36:19,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781187405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:19,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:19,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:36:19,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741769590] [2024-06-04 15:36:19,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:19,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:36:19,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:19,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:36:19,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:36:19,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-04 15:36:19,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 196 transitions, 2047 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:19,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:19,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-04 15:36:19,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:20,219 INFO L124 PetriNetUnfolderBase]: 1690/2676 cut-off events. [2024-06-04 15:36:20,220 INFO L125 PetriNetUnfolderBase]: For 42609/42618 co-relation queries the response was YES. [2024-06-04 15:36:20,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15547 conditions, 2676 events. 1690/2676 cut-off events. For 42609/42618 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 13546 event pairs, 404 based on Foata normal form. 9/2677 useless extension candidates. Maximal degree in co-relation 15467. Up to 2452 conditions per place. [2024-06-04 15:36:20,241 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 158 selfloop transitions, 41 changer transitions 0/214 dead transitions. [2024-06-04 15:36:20,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 214 transitions, 2523 flow [2024-06-04 15:36:20,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:36:20,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:36:20,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-04 15:36:20,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-04 15:36:20,243 INFO L175 Difference]: Start difference. First operand has 154 places, 196 transitions, 2047 flow. Second operand 6 states and 116 transitions. [2024-06-04 15:36:20,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 214 transitions, 2523 flow [2024-06-04 15:36:20,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 214 transitions, 2468 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-04 15:36:20,306 INFO L231 Difference]: Finished difference. Result has 156 places, 196 transitions, 2092 flow [2024-06-04 15:36:20,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1992, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2092, PETRI_PLACES=156, PETRI_TRANSITIONS=196} [2024-06-04 15:36:20,307 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 114 predicate places. [2024-06-04 15:36:20,307 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 196 transitions, 2092 flow [2024-06-04 15:36:20,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:20,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:20,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:20,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-04 15:36:20,308 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:20,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:20,308 INFO L85 PathProgramCache]: Analyzing trace with hash 198980120, now seen corresponding path program 1 times [2024-06-04 15:36:20,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:20,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635972242] [2024-06-04 15:36:20,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:20,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:20,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:21,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:21,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:21,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635972242] [2024-06-04 15:36:21,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635972242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:21,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:21,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:36:21,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580543841] [2024-06-04 15:36:21,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:21,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:36:21,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:21,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:36:21,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:36:21,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:36:21,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 196 transitions, 2092 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:21,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:21,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:36:21,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:21,636 INFO L124 PetriNetUnfolderBase]: 1773/2760 cut-off events. [2024-06-04 15:36:21,636 INFO L125 PetriNetUnfolderBase]: For 45294/45296 co-relation queries the response was YES. [2024-06-04 15:36:21,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16180 conditions, 2760 events. 1773/2760 cut-off events. For 45294/45296 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 13836 event pairs, 443 based on Foata normal form. 2/2760 useless extension candidates. Maximal degree in co-relation 16100. Up to 2682 conditions per place. [2024-06-04 15:36:21,657 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 188 selfloop transitions, 15 changer transitions 0/207 dead transitions. [2024-06-04 15:36:21,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 207 transitions, 2538 flow [2024-06-04 15:36:21,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:36:21,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:36:21,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-04 15:36:21,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-04 15:36:21,659 INFO L175 Difference]: Start difference. First operand has 156 places, 196 transitions, 2092 flow. Second operand 6 states and 102 transitions. [2024-06-04 15:36:21,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 207 transitions, 2538 flow [2024-06-04 15:36:21,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 207 transitions, 2445 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-04 15:36:21,739 INFO L231 Difference]: Finished difference. Result has 157 places, 198 transitions, 2054 flow [2024-06-04 15:36:21,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1999, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2054, PETRI_PLACES=157, PETRI_TRANSITIONS=198} [2024-06-04 15:36:21,739 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 115 predicate places. [2024-06-04 15:36:21,739 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 198 transitions, 2054 flow [2024-06-04 15:36:21,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:21,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:21,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:21,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-04 15:36:21,740 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)] === [2024-06-04 15:36:21,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:21,740 INFO L85 PathProgramCache]: Analyzing trace with hash 647313017, now seen corresponding path program 1 times [2024-06-04 15:36:21,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:21,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862214093] [2024-06-04 15:36:21,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:21,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:21,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:23,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:23,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:23,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862214093] [2024-06-04 15:36:23,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862214093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:23,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:23,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:36:23,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690101750] [2024-06-04 15:36:23,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:23,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:36:23,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:23,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:36:23,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:36:23,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:36:23,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 198 transitions, 2054 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:23,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:23,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:36:23,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:23,884 INFO L124 PetriNetUnfolderBase]: 1855/2902 cut-off events. [2024-06-04 15:36:23,885 INFO L125 PetriNetUnfolderBase]: For 50959/50961 co-relation queries the response was YES. [2024-06-04 15:36:23,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16862 conditions, 2902 events. 1855/2902 cut-off events. For 50959/50961 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 14793 event pairs, 373 based on Foata normal form. 12/2905 useless extension candidates. Maximal degree in co-relation 16781. Up to 2467 conditions per place. [2024-06-04 15:36:23,908 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 169 selfloop transitions, 55 changer transitions 0/228 dead transitions. [2024-06-04 15:36:23,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 228 transitions, 2628 flow [2024-06-04 15:36:23,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:36:23,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:36:23,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-04 15:36:23,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-04 15:36:23,909 INFO L175 Difference]: Start difference. First operand has 157 places, 198 transitions, 2054 flow. Second operand 8 states and 146 transitions. [2024-06-04 15:36:23,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 228 transitions, 2628 flow [2024-06-04 15:36:23,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 228 transitions, 2589 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-04 15:36:23,999 INFO L231 Difference]: Finished difference. Result has 161 places, 200 transitions, 2165 flow [2024-06-04 15:36:23,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2015, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2165, PETRI_PLACES=161, PETRI_TRANSITIONS=200} [2024-06-04 15:36:24,000 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 119 predicate places. [2024-06-04 15:36:24,000 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 200 transitions, 2165 flow [2024-06-04 15:36:24,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:24,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:24,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:24,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-04 15:36:24,000 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)] === [2024-06-04 15:36:24,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:24,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1705197963, now seen corresponding path program 2 times [2024-06-04 15:36:24,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:24,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158023870] [2024-06-04 15:36:24,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:24,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:24,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:25,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:25,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:25,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158023870] [2024-06-04 15:36:25,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158023870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:25,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:25,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:36:25,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081149319] [2024-06-04 15:36:25,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:25,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:36:25,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:25,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:36:25,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:36:25,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:36:25,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 200 transitions, 2165 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:25,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:25,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:36:25,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:26,095 INFO L124 PetriNetUnfolderBase]: 1983/3106 cut-off events. [2024-06-04 15:36:26,095 INFO L125 PetriNetUnfolderBase]: For 55933/55935 co-relation queries the response was YES. [2024-06-04 15:36:26,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18270 conditions, 3106 events. 1983/3106 cut-off events. For 55933/55935 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 16189 event pairs, 386 based on Foata normal form. 14/3115 useless extension candidates. Maximal degree in co-relation 18188. Up to 2818 conditions per place. [2024-06-04 15:36:26,120 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 206 selfloop transitions, 48 changer transitions 0/258 dead transitions. [2024-06-04 15:36:26,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 258 transitions, 3060 flow [2024-06-04 15:36:26,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:36:26,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:36:26,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 190 transitions. [2024-06-04 15:36:26,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4212860310421286 [2024-06-04 15:36:26,122 INFO L175 Difference]: Start difference. First operand has 161 places, 200 transitions, 2165 flow. Second operand 11 states and 190 transitions. [2024-06-04 15:36:26,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 258 transitions, 3060 flow [2024-06-04 15:36:26,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 258 transitions, 2910 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-04 15:36:26,256 INFO L231 Difference]: Finished difference. Result has 169 places, 220 transitions, 2422 flow [2024-06-04 15:36:26,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2048, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2422, PETRI_PLACES=169, PETRI_TRANSITIONS=220} [2024-06-04 15:36:26,256 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 127 predicate places. [2024-06-04 15:36:26,256 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 220 transitions, 2422 flow [2024-06-04 15:36:26,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:26,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:26,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:26,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-04 15:36:26,257 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)] === [2024-06-04 15:36:26,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:26,258 INFO L85 PathProgramCache]: Analyzing trace with hash -2102809513, now seen corresponding path program 3 times [2024-06-04 15:36:26,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:26,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892111299] [2024-06-04 15:36:26,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:26,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:26,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:27,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:27,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:27,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892111299] [2024-06-04 15:36:27,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892111299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:27,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:27,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:36:27,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559020190] [2024-06-04 15:36:27,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:27,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:36:27,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:27,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:36:27,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:36:27,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:36:27,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 220 transitions, 2422 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:27,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:27,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:36:27,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:28,191 INFO L124 PetriNetUnfolderBase]: 2024/3177 cut-off events. [2024-06-04 15:36:28,192 INFO L125 PetriNetUnfolderBase]: For 59999/60001 co-relation queries the response was YES. [2024-06-04 15:36:28,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18775 conditions, 3177 events. 2024/3177 cut-off events. For 59999/60001 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 16631 event pairs, 352 based on Foata normal form. 12/3180 useless extension candidates. Maximal degree in co-relation 18689. Up to 2842 conditions per place. [2024-06-04 15:36:28,216 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 210 selfloop transitions, 35 changer transitions 0/249 dead transitions. [2024-06-04 15:36:28,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 249 transitions, 3018 flow [2024-06-04 15:36:28,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:36:28,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:36:28,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-04 15:36:28,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-04 15:36:28,217 INFO L175 Difference]: Start difference. First operand has 169 places, 220 transitions, 2422 flow. Second operand 8 states and 142 transitions. [2024-06-04 15:36:28,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 249 transitions, 3018 flow [2024-06-04 15:36:28,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 249 transitions, 2951 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-04 15:36:28,324 INFO L231 Difference]: Finished difference. Result has 174 places, 221 transitions, 2455 flow [2024-06-04 15:36:28,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2355, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2455, PETRI_PLACES=174, PETRI_TRANSITIONS=221} [2024-06-04 15:36:28,325 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 132 predicate places. [2024-06-04 15:36:28,325 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 221 transitions, 2455 flow [2024-06-04 15:36:28,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:28,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:28,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:28,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-04 15:36:28,326 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)] === [2024-06-04 15:36:28,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:28,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1715434007, now seen corresponding path program 4 times [2024-06-04 15:36:28,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:28,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332207686] [2024-06-04 15:36:28,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:28,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:28,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:29,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:29,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:29,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332207686] [2024-06-04 15:36:29,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332207686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:29,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:29,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:36:29,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344553696] [2024-06-04 15:36:29,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:29,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:36:29,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:29,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:36:29,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:36:29,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:36:29,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 221 transitions, 2455 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:29,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:29,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:36:29,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:30,545 INFO L124 PetriNetUnfolderBase]: 2099/3307 cut-off events. [2024-06-04 15:36:30,546 INFO L125 PetriNetUnfolderBase]: For 64861/64870 co-relation queries the response was YES. [2024-06-04 15:36:30,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19441 conditions, 3307 events. 2099/3307 cut-off events. For 64861/64870 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 17535 event pairs, 474 based on Foata normal form. 18/3320 useless extension candidates. Maximal degree in co-relation 19354. Up to 2828 conditions per place. [2024-06-04 15:36:30,587 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 226 selfloop transitions, 39 changer transitions 0/269 dead transitions. [2024-06-04 15:36:30,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 269 transitions, 3225 flow [2024-06-04 15:36:30,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:36:30,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:36:30,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-04 15:36:30,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-04 15:36:30,589 INFO L175 Difference]: Start difference. First operand has 174 places, 221 transitions, 2455 flow. Second operand 10 states and 180 transitions. [2024-06-04 15:36:30,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 269 transitions, 3225 flow [2024-06-04 15:36:30,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 269 transitions, 3143 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-04 15:36:30,708 INFO L231 Difference]: Finished difference. Result has 180 places, 226 transitions, 2539 flow [2024-06-04 15:36:30,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2373, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2539, PETRI_PLACES=180, PETRI_TRANSITIONS=226} [2024-06-04 15:36:30,709 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 138 predicate places. [2024-06-04 15:36:30,709 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 226 transitions, 2539 flow [2024-06-04 15:36:30,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:30,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:30,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:30,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-04 15:36:30,710 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)] === [2024-06-04 15:36:30,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:30,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1779248421, now seen corresponding path program 5 times [2024-06-04 15:36:30,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:30,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336038580] [2024-06-04 15:36:30,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:30,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:30,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:31,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:31,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:31,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336038580] [2024-06-04 15:36:31,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336038580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:31,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:31,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:36:31,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586319845] [2024-06-04 15:36:31,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:31,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:36:31,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:31,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:36:31,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:36:31,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:36:31,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 226 transitions, 2539 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:31,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:31,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:36:31,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:32,627 INFO L124 PetriNetUnfolderBase]: 2079/3270 cut-off events. [2024-06-04 15:36:32,627 INFO L125 PetriNetUnfolderBase]: For 65307/65309 co-relation queries the response was YES. [2024-06-04 15:36:32,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19209 conditions, 3270 events. 2079/3270 cut-off events. For 65307/65309 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 17227 event pairs, 435 based on Foata normal form. 12/3273 useless extension candidates. Maximal degree in co-relation 19119. Up to 2754 conditions per place. [2024-06-04 15:36:32,656 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 185 selfloop transitions, 66 changer transitions 0/255 dead transitions. [2024-06-04 15:36:32,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 255 transitions, 3109 flow [2024-06-04 15:36:32,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:36:32,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:36:32,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-04 15:36:32,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-04 15:36:32,657 INFO L175 Difference]: Start difference. First operand has 180 places, 226 transitions, 2539 flow. Second operand 8 states and 145 transitions. [2024-06-04 15:36:32,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 255 transitions, 3109 flow [2024-06-04 15:36:32,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 255 transitions, 3022 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-04 15:36:32,777 INFO L231 Difference]: Finished difference. Result has 184 places, 226 transitions, 2577 flow [2024-06-04 15:36:32,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2410, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2577, PETRI_PLACES=184, PETRI_TRANSITIONS=226} [2024-06-04 15:36:32,777 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 142 predicate places. [2024-06-04 15:36:32,777 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 226 transitions, 2577 flow [2024-06-04 15:36:32,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:32,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:32,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:32,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-04 15:36:32,778 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:32,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:32,778 INFO L85 PathProgramCache]: Analyzing trace with hash 452227369, now seen corresponding path program 1 times [2024-06-04 15:36:32,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:32,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374398813] [2024-06-04 15:36:32,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:32,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:32,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:33,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:33,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:33,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374398813] [2024-06-04 15:36:33,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374398813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:33,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:33,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:36:33,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362406884] [2024-06-04 15:36:33,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:33,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:36:33,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:33,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:36:33,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:36:33,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-04 15:36:33,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 226 transitions, 2577 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:33,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:33,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-04 15:36:33,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:34,353 INFO L124 PetriNetUnfolderBase]: 2041/3235 cut-off events. [2024-06-04 15:36:34,353 INFO L125 PetriNetUnfolderBase]: For 67895/67898 co-relation queries the response was YES. [2024-06-04 15:36:34,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19257 conditions, 3235 events. 2041/3235 cut-off events. For 67895/67898 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 17201 event pairs, 478 based on Foata normal form. 6/3227 useless extension candidates. Maximal degree in co-relation 19166. Up to 2712 conditions per place. [2024-06-04 15:36:34,382 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 142 selfloop transitions, 107 changer transitions 0/265 dead transitions. [2024-06-04 15:36:34,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 265 transitions, 3475 flow [2024-06-04 15:36:34,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:36:34,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:36:34,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-04 15:36:34,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-04 15:36:34,383 INFO L175 Difference]: Start difference. First operand has 184 places, 226 transitions, 2577 flow. Second operand 9 states and 168 transitions. [2024-06-04 15:36:34,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 265 transitions, 3475 flow [2024-06-04 15:36:34,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 265 transitions, 3290 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-04 15:36:34,520 INFO L231 Difference]: Finished difference. Result has 187 places, 240 transitions, 2867 flow [2024-06-04 15:36:34,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2396, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2867, PETRI_PLACES=187, PETRI_TRANSITIONS=240} [2024-06-04 15:36:34,520 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 145 predicate places. [2024-06-04 15:36:34,520 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 240 transitions, 2867 flow [2024-06-04 15:36:34,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:34,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:34,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:34,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-04 15:36:34,521 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:34,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:34,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1578347496, now seen corresponding path program 1 times [2024-06-04 15:36:34,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:34,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849641331] [2024-06-04 15:36:34,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:34,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:34,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:35,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:35,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:35,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849641331] [2024-06-04 15:36:35,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849641331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:35,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:35,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:36:35,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623239162] [2024-06-04 15:36:35,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:35,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:36:35,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:35,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:36:35,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:36:35,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:36:35,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 240 transitions, 2867 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:35,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:35,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:36:35,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:35,899 INFO L124 PetriNetUnfolderBase]: 2125/3336 cut-off events. [2024-06-04 15:36:35,900 INFO L125 PetriNetUnfolderBase]: For 73470/73472 co-relation queries the response was YES. [2024-06-04 15:36:35,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20553 conditions, 3336 events. 2125/3336 cut-off events. For 73470/73472 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 17654 event pairs, 567 based on Foata normal form. 2/3336 useless extension candidates. Maximal degree in co-relation 20462. Up to 3185 conditions per place. [2024-06-04 15:36:35,931 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 234 selfloop transitions, 37 changer transitions 0/275 dead transitions. [2024-06-04 15:36:35,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 275 transitions, 3681 flow [2024-06-04 15:36:35,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:36:35,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:36:35,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-04 15:36:35,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-04 15:36:35,932 INFO L175 Difference]: Start difference. First operand has 187 places, 240 transitions, 2867 flow. Second operand 8 states and 141 transitions. [2024-06-04 15:36:35,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 275 transitions, 3681 flow [2024-06-04 15:36:36,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 275 transitions, 3511 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-04 15:36:36,077 INFO L231 Difference]: Finished difference. Result has 193 places, 253 transitions, 2952 flow [2024-06-04 15:36:36,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2706, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2952, PETRI_PLACES=193, PETRI_TRANSITIONS=253} [2024-06-04 15:36:36,078 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 151 predicate places. [2024-06-04 15:36:36,078 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 253 transitions, 2952 flow [2024-06-04 15:36:36,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:36,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:36,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:36,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-04 15:36:36,079 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:36,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:36,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1582072146, now seen corresponding path program 2 times [2024-06-04 15:36:36,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:36,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203384433] [2024-06-04 15:36:36,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:36,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:36,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:36,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:36,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:36,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203384433] [2024-06-04 15:36:36,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203384433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:36,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:36,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:36:36,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5258829] [2024-06-04 15:36:36,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:36,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:36:36,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:36,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:36:36,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:36:36,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:36:36,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 253 transitions, 2952 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:36,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:36,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:36:36,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:37,552 INFO L124 PetriNetUnfolderBase]: 2151/3374 cut-off events. [2024-06-04 15:36:37,552 INFO L125 PetriNetUnfolderBase]: For 73631/73633 co-relation queries the response was YES. [2024-06-04 15:36:37,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20829 conditions, 3374 events. 2151/3374 cut-off events. For 73631/73633 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 17863 event pairs, 567 based on Foata normal form. 2/3374 useless extension candidates. Maximal degree in co-relation 20735. Up to 3248 conditions per place. [2024-06-04 15:36:37,581 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 242 selfloop transitions, 35 changer transitions 0/281 dead transitions. [2024-06-04 15:36:37,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 281 transitions, 3712 flow [2024-06-04 15:36:37,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:36:37,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:36:37,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-04 15:36:37,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3975609756097561 [2024-06-04 15:36:37,583 INFO L175 Difference]: Start difference. First operand has 193 places, 253 transitions, 2952 flow. Second operand 10 states and 163 transitions. [2024-06-04 15:36:37,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 281 transitions, 3712 flow [2024-06-04 15:36:37,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 281 transitions, 3636 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-04 15:36:37,731 INFO L231 Difference]: Finished difference. Result has 201 places, 261 transitions, 3052 flow [2024-06-04 15:36:37,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2892, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3052, PETRI_PLACES=201, PETRI_TRANSITIONS=261} [2024-06-04 15:36:37,732 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 159 predicate places. [2024-06-04 15:36:37,732 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 261 transitions, 3052 flow [2024-06-04 15:36:37,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:37,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:37,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:37,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-04 15:36:37,733 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:37,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:37,733 INFO L85 PathProgramCache]: Analyzing trace with hash 456036649, now seen corresponding path program 2 times [2024-06-04 15:36:37,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:37,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826493999] [2024-06-04 15:36:37,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:37,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:37,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:38,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:38,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:38,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826493999] [2024-06-04 15:36:38,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826493999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:38,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:38,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:36:38,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553838010] [2024-06-04 15:36:38,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:38,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:36:38,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:38,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:36:38,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:36:38,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-04 15:36:38,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 261 transitions, 3052 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:38,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:38,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-04 15:36:38,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:39,343 INFO L124 PetriNetUnfolderBase]: 2118/3343 cut-off events. [2024-06-04 15:36:39,343 INFO L125 PetriNetUnfolderBase]: For 78180/78183 co-relation queries the response was YES. [2024-06-04 15:36:39,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20769 conditions, 3343 events. 2118/3343 cut-off events. For 78180/78183 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 17809 event pairs, 482 based on Foata normal form. 6/3335 useless extension candidates. Maximal degree in co-relation 20672. Up to 2978 conditions per place. [2024-06-04 15:36:39,375 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 191 selfloop transitions, 74 changer transitions 0/287 dead transitions. [2024-06-04 15:36:39,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 287 transitions, 3798 flow [2024-06-04 15:36:39,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:36:39,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:36:39,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-04 15:36:39,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-04 15:36:39,377 INFO L175 Difference]: Start difference. First operand has 201 places, 261 transitions, 3052 flow. Second operand 8 states and 143 transitions. [2024-06-04 15:36:39,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 287 transitions, 3798 flow [2024-06-04 15:36:39,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 287 transitions, 3746 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-04 15:36:39,570 INFO L231 Difference]: Finished difference. Result has 205 places, 271 transitions, 3322 flow [2024-06-04 15:36:39,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3000, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3322, PETRI_PLACES=205, PETRI_TRANSITIONS=271} [2024-06-04 15:36:39,570 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 163 predicate places. [2024-06-04 15:36:39,570 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 271 transitions, 3322 flow [2024-06-04 15:36:39,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:39,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:39,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:39,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-04 15:36:39,571 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:39,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:39,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1582066566, now seen corresponding path program 3 times [2024-06-04 15:36:39,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:39,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836442497] [2024-06-04 15:36:39,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:39,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:39,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:40,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:40,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:40,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836442497] [2024-06-04 15:36:40,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836442497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:40,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:40,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:36:40,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955460682] [2024-06-04 15:36:40,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:40,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:36:40,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:40,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:36:40,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:36:40,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:36:40,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 271 transitions, 3322 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:40,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:40,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:36:40,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:40,899 INFO L124 PetriNetUnfolderBase]: 2170/3399 cut-off events. [2024-06-04 15:36:40,900 INFO L125 PetriNetUnfolderBase]: For 85977/85979 co-relation queries the response was YES. [2024-06-04 15:36:40,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21670 conditions, 3399 events. 2170/3399 cut-off events. For 85977/85979 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 17964 event pairs, 568 based on Foata normal form. 2/3399 useless extension candidates. Maximal degree in co-relation 21570. Up to 3278 conditions per place. [2024-06-04 15:36:40,935 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 250 selfloop transitions, 34 changer transitions 0/288 dead transitions. [2024-06-04 15:36:40,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 288 transitions, 3942 flow [2024-06-04 15:36:40,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:36:40,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:36:40,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-04 15:36:40,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-04 15:36:40,937 INFO L175 Difference]: Start difference. First operand has 205 places, 271 transitions, 3322 flow. Second operand 8 states and 138 transitions. [2024-06-04 15:36:40,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 288 transitions, 3942 flow [2024-06-04 15:36:41,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 288 transitions, 3735 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-04 15:36:41,166 INFO L231 Difference]: Finished difference. Result has 208 places, 271 transitions, 3189 flow [2024-06-04 15:36:41,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3115, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3189, PETRI_PLACES=208, PETRI_TRANSITIONS=271} [2024-06-04 15:36:41,167 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 166 predicate places. [2024-06-04 15:36:41,167 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 271 transitions, 3189 flow [2024-06-04 15:36:41,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:41,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:41,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:41,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-04 15:36:41,168 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:41,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:41,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1873140950, now seen corresponding path program 4 times [2024-06-04 15:36:41,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:41,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541353467] [2024-06-04 15:36:41,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:41,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:41,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:41,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:41,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:41,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541353467] [2024-06-04 15:36:41,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541353467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:41,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:41,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:36:41,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791279145] [2024-06-04 15:36:41,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:41,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:36:41,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:41,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:36:41,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:36:41,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:36:41,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 271 transitions, 3189 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:41,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:41,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:36:41,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:42,549 INFO L124 PetriNetUnfolderBase]: 2180/3413 cut-off events. [2024-06-04 15:36:42,550 INFO L125 PetriNetUnfolderBase]: For 84947/84949 co-relation queries the response was YES. [2024-06-04 15:36:42,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21524 conditions, 3413 events. 2180/3413 cut-off events. For 84947/84949 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 18048 event pairs, 571 based on Foata normal form. 2/3413 useless extension candidates. Maximal degree in co-relation 21424. Up to 3328 conditions per place. [2024-06-04 15:36:42,580 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 264 selfloop transitions, 17 changer transitions 0/285 dead transitions. [2024-06-04 15:36:42,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 285 transitions, 3818 flow [2024-06-04 15:36:42,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:36:42,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:36:42,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-04 15:36:42,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40069686411149824 [2024-06-04 15:36:42,582 INFO L175 Difference]: Start difference. First operand has 208 places, 271 transitions, 3189 flow. Second operand 7 states and 115 transitions. [2024-06-04 15:36:42,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 285 transitions, 3818 flow [2024-06-04 15:36:42,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 285 transitions, 3750 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-04 15:36:42,786 INFO L231 Difference]: Finished difference. Result has 208 places, 274 transitions, 3202 flow [2024-06-04 15:36:42,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3121, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3202, PETRI_PLACES=208, PETRI_TRANSITIONS=274} [2024-06-04 15:36:42,787 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 166 predicate places. [2024-06-04 15:36:42,787 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 274 transitions, 3202 flow [2024-06-04 15:36:42,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:42,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:42,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:42,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-04 15:36:42,788 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:42,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:42,788 INFO L85 PathProgramCache]: Analyzing trace with hash 154858896, now seen corresponding path program 5 times [2024-06-04 15:36:42,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:42,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750419010] [2024-06-04 15:36:42,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:42,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:42,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:43,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:43,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:43,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750419010] [2024-06-04 15:36:43,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750419010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:43,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:43,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:36:43,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202167579] [2024-06-04 15:36:43,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:43,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:36:43,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:43,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:36:43,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:36:43,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:36:43,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 274 transitions, 3202 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:43,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:43,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:36:43,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:44,151 INFO L124 PetriNetUnfolderBase]: 2190/3429 cut-off events. [2024-06-04 15:36:44,152 INFO L125 PetriNetUnfolderBase]: For 89434/89436 co-relation queries the response was YES. [2024-06-04 15:36:44,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21730 conditions, 3429 events. 2190/3429 cut-off events. For 89434/89436 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 18177 event pairs, 570 based on Foata normal form. 2/3429 useless extension candidates. Maximal degree in co-relation 21629. Up to 3295 conditions per place. [2024-06-04 15:36:44,184 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 259 selfloop transitions, 32 changer transitions 0/295 dead transitions. [2024-06-04 15:36:44,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 295 transitions, 3959 flow [2024-06-04 15:36:44,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:36:44,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:36:44,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-04 15:36:44,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355400696864111 [2024-06-04 15:36:44,186 INFO L175 Difference]: Start difference. First operand has 208 places, 274 transitions, 3202 flow. Second operand 7 states and 125 transitions. [2024-06-04 15:36:44,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 295 transitions, 3959 flow [2024-06-04 15:36:44,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 295 transitions, 3909 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-04 15:36:44,412 INFO L231 Difference]: Finished difference. Result has 211 places, 279 transitions, 3299 flow [2024-06-04 15:36:44,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3152, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3299, PETRI_PLACES=211, PETRI_TRANSITIONS=279} [2024-06-04 15:36:44,413 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 169 predicate places. [2024-06-04 15:36:44,413 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 279 transitions, 3299 flow [2024-06-04 15:36:44,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:44,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:44,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:44,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-04 15:36:44,413 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:44,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:44,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1873148607, now seen corresponding path program 1 times [2024-06-04 15:36:44,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:44,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046190216] [2024-06-04 15:36:44,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:44,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:44,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:45,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:45,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:45,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046190216] [2024-06-04 15:36:45,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046190216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:45,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:45,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:36:45,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794461003] [2024-06-04 15:36:45,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:45,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:36:45,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:45,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:36:45,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:36:45,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:36:45,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 279 transitions, 3299 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:45,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:45,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:36:45,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:45,815 INFO L124 PetriNetUnfolderBase]: 2187/3423 cut-off events. [2024-06-04 15:36:45,816 INFO L125 PetriNetUnfolderBase]: For 93691/93693 co-relation queries the response was YES. [2024-06-04 15:36:45,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21893 conditions, 3423 events. 2187/3423 cut-off events. For 93691/93693 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 18139 event pairs, 570 based on Foata normal form. 1/3422 useless extension candidates. Maximal degree in co-relation 21790. Up to 3340 conditions per place. [2024-06-04 15:36:45,848 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 268 selfloop transitions, 19 changer transitions 0/291 dead transitions. [2024-06-04 15:36:45,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 291 transitions, 3929 flow [2024-06-04 15:36:45,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:36:45,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:36:45,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-04 15:36:45,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-04 15:36:45,864 INFO L175 Difference]: Start difference. First operand has 211 places, 279 transitions, 3299 flow. Second operand 6 states and 102 transitions. [2024-06-04 15:36:45,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 291 transitions, 3929 flow [2024-06-04 15:36:46,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 291 transitions, 3861 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-04 15:36:46,139 INFO L231 Difference]: Finished difference. Result has 214 places, 282 transitions, 3315 flow [2024-06-04 15:36:46,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3231, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3315, PETRI_PLACES=214, PETRI_TRANSITIONS=282} [2024-06-04 15:36:46,140 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 172 predicate places. [2024-06-04 15:36:46,141 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 282 transitions, 3315 flow [2024-06-04 15:36:46,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:46,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:46,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:46,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-04 15:36:46,141 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)] === [2024-06-04 15:36:46,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:46,143 INFO L85 PathProgramCache]: Analyzing trace with hash 2087428605, now seen corresponding path program 3 times [2024-06-04 15:36:46,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:46,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481186393] [2024-06-04 15:36:46,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:46,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:46,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:46,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:46,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:46,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481186393] [2024-06-04 15:36:46,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481186393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:46,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:46,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:36:46,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175032900] [2024-06-04 15:36:46,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:46,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:36:46,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:46,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:36:46,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:36:47,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-04 15:36:47,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 282 transitions, 3315 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:47,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:47,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-04 15:36:47,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:47,661 INFO L124 PetriNetUnfolderBase]: 2124/3357 cut-off events. [2024-06-04 15:36:47,662 INFO L125 PetriNetUnfolderBase]: For 97049/97058 co-relation queries the response was YES. [2024-06-04 15:36:47,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21520 conditions, 3357 events. 2124/3357 cut-off events. For 97049/97058 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 17943 event pairs, 478 based on Foata normal form. 9/3358 useless extension candidates. Maximal degree in co-relation 21416. Up to 3041 conditions per place. [2024-06-04 15:36:47,694 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 226 selfloop transitions, 55 changer transitions 0/307 dead transitions. [2024-06-04 15:36:47,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 307 transitions, 4029 flow [2024-06-04 15:36:47,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:36:47,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:36:47,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-04 15:36:47,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46689895470383275 [2024-06-04 15:36:47,695 INFO L175 Difference]: Start difference. First operand has 214 places, 282 transitions, 3315 flow. Second operand 7 states and 134 transitions. [2024-06-04 15:36:47,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 307 transitions, 4029 flow [2024-06-04 15:36:47,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 307 transitions, 3985 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-04 15:36:47,939 INFO L231 Difference]: Finished difference. Result has 217 places, 285 transitions, 3458 flow [2024-06-04 15:36:47,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3271, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3458, PETRI_PLACES=217, PETRI_TRANSITIONS=285} [2024-06-04 15:36:47,940 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 175 predicate places. [2024-06-04 15:36:47,940 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 285 transitions, 3458 flow [2024-06-04 15:36:47,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:47,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:47,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:47,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-04 15:36:47,940 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)] === [2024-06-04 15:36:47,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:47,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1865783720, now seen corresponding path program 6 times [2024-06-04 15:36:47,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:47,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504226919] [2024-06-04 15:36:47,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:47,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:47,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:48,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:48,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:48,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504226919] [2024-06-04 15:36:48,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504226919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:48,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:48,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:36:48,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928033570] [2024-06-04 15:36:48,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:48,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:36:48,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:48,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:36:48,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:36:48,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:36:48,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 285 transitions, 3458 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:48,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:48,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:36:48,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:49,399 INFO L124 PetriNetUnfolderBase]: 2180/3414 cut-off events. [2024-06-04 15:36:49,399 INFO L125 PetriNetUnfolderBase]: For 100355/100357 co-relation queries the response was YES. [2024-06-04 15:36:49,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22285 conditions, 3414 events. 2180/3414 cut-off events. For 100355/100357 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 18095 event pairs, 568 based on Foata normal form. 2/3414 useless extension candidates. Maximal degree in co-relation 22180. Up to 3285 conditions per place. [2024-06-04 15:36:49,432 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 265 selfloop transitions, 34 changer transitions 0/303 dead transitions. [2024-06-04 15:36:49,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 303 transitions, 4112 flow [2024-06-04 15:36:49,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:36:49,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:36:49,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-04 15:36:49,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425087108013937 [2024-06-04 15:36:49,434 INFO L175 Difference]: Start difference. First operand has 217 places, 285 transitions, 3458 flow. Second operand 7 states and 127 transitions. [2024-06-04 15:36:49,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 303 transitions, 4112 flow [2024-06-04 15:36:49,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 303 transitions, 3968 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-04 15:36:49,647 INFO L231 Difference]: Finished difference. Result has 219 places, 285 transitions, 3388 flow [2024-06-04 15:36:49,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3314, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3388, PETRI_PLACES=219, PETRI_TRANSITIONS=285} [2024-06-04 15:36:49,648 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 177 predicate places. [2024-06-04 15:36:49,648 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 285 transitions, 3388 flow [2024-06-04 15:36:49,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:49,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:49,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:49,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-04 15:36:49,649 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)] === [2024-06-04 15:36:49,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:49,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1274755267, now seen corresponding path program 1 times [2024-06-04 15:36:49,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:49,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878589366] [2024-06-04 15:36:49,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:49,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:49,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:50,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:50,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:50,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878589366] [2024-06-04 15:36:50,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878589366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:50,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:50,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:36:50,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068715013] [2024-06-04 15:36:50,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:50,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:36:50,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:50,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:36:50,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:36:50,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:36:50,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 285 transitions, 3388 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:50,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:50,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:36:50,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:51,134 INFO L124 PetriNetUnfolderBase]: 2274/3562 cut-off events. [2024-06-04 15:36:51,134 INFO L125 PetriNetUnfolderBase]: For 109970/109979 co-relation queries the response was YES. [2024-06-04 15:36:51,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23351 conditions, 3562 events. 2274/3562 cut-off events. For 109970/109979 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 19016 event pairs, 480 based on Foata normal form. 10/3567 useless extension candidates. Maximal degree in co-relation 23245. Up to 3321 conditions per place. [2024-06-04 15:36:51,170 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 267 selfloop transitions, 56 changer transitions 0/327 dead transitions. [2024-06-04 15:36:51,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 327 transitions, 4490 flow [2024-06-04 15:36:51,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:36:51,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:36:51,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-04 15:36:51,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-04 15:36:51,171 INFO L175 Difference]: Start difference. First operand has 219 places, 285 transitions, 3388 flow. Second operand 8 states and 142 transitions. [2024-06-04 15:36:51,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 327 transitions, 4490 flow [2024-06-04 15:36:51,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 327 transitions, 4380 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-04 15:36:51,422 INFO L231 Difference]: Finished difference. Result has 224 places, 304 transitions, 3737 flow [2024-06-04 15:36:51,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3278, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3737, PETRI_PLACES=224, PETRI_TRANSITIONS=304} [2024-06-04 15:36:51,423 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2024-06-04 15:36:51,423 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 304 transitions, 3737 flow [2024-06-04 15:36:51,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:51,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:51,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:51,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-04 15:36:51,424 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)] === [2024-06-04 15:36:51,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:51,424 INFO L85 PathProgramCache]: Analyzing trace with hash 617374905, now seen corresponding path program 2 times [2024-06-04 15:36:51,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:51,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877671654] [2024-06-04 15:36:51,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:51,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:51,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:52,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:52,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:52,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877671654] [2024-06-04 15:36:52,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877671654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:52,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:52,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:36:52,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017459508] [2024-06-04 15:36:52,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:52,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:36:52,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:52,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:36:52,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:36:52,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:36:52,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 304 transitions, 3737 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:52,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:52,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:36:52,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:52,849 INFO L124 PetriNetUnfolderBase]: 2294/3589 cut-off events. [2024-06-04 15:36:52,850 INFO L125 PetriNetUnfolderBase]: For 118049/118058 co-relation queries the response was YES. [2024-06-04 15:36:52,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24323 conditions, 3589 events. 2294/3589 cut-off events. For 118049/118058 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 19099 event pairs, 488 based on Foata normal form. 10/3594 useless extension candidates. Maximal degree in co-relation 24214. Up to 3446 conditions per place. [2024-06-04 15:36:52,884 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 285 selfloop transitions, 30 changer transitions 0/319 dead transitions. [2024-06-04 15:36:52,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 319 transitions, 4481 flow [2024-06-04 15:36:52,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:36:52,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:36:52,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-04 15:36:52,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-04 15:36:52,886 INFO L175 Difference]: Start difference. First operand has 224 places, 304 transitions, 3737 flow. Second operand 6 states and 105 transitions. [2024-06-04 15:36:52,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 319 transitions, 4481 flow [2024-06-04 15:36:53,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 319 transitions, 4414 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-04 15:36:53,170 INFO L231 Difference]: Finished difference. Result has 228 places, 307 transitions, 3799 flow [2024-06-04 15:36:53,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3670, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3799, PETRI_PLACES=228, PETRI_TRANSITIONS=307} [2024-06-04 15:36:53,171 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 186 predicate places. [2024-06-04 15:36:53,171 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 307 transitions, 3799 flow [2024-06-04 15:36:53,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:53,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:53,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:53,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-04 15:36:53,172 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)] === [2024-06-04 15:36:53,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:53,172 INFO L85 PathProgramCache]: Analyzing trace with hash 617137755, now seen corresponding path program 3 times [2024-06-04 15:36:53,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:53,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555603250] [2024-06-04 15:36:53,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:53,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:53,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:53,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:53,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:53,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555603250] [2024-06-04 15:36:53,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555603250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:53,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:53,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:36:53,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659642031] [2024-06-04 15:36:53,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:53,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:36:53,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:53,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:36:53,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:36:53,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:36:53,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 307 transitions, 3799 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:53,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:53,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:36:53,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:54,634 INFO L124 PetriNetUnfolderBase]: 2282/3574 cut-off events. [2024-06-04 15:36:54,634 INFO L125 PetriNetUnfolderBase]: For 120293/120302 co-relation queries the response was YES. [2024-06-04 15:36:54,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24214 conditions, 3574 events. 2282/3574 cut-off events. For 120293/120302 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 19084 event pairs, 476 based on Foata normal form. 10/3579 useless extension candidates. Maximal degree in co-relation 24103. Up to 3329 conditions per place. [2024-06-04 15:36:54,669 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 265 selfloop transitions, 58 changer transitions 0/327 dead transitions. [2024-06-04 15:36:54,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 327 transitions, 4557 flow [2024-06-04 15:36:54,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:36:54,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:36:54,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-04 15:36:54,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-04 15:36:54,671 INFO L175 Difference]: Start difference. First operand has 228 places, 307 transitions, 3799 flow. Second operand 7 states and 126 transitions. [2024-06-04 15:36:54,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 327 transitions, 4557 flow [2024-06-04 15:36:54,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 327 transitions, 4459 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-04 15:36:54,979 INFO L231 Difference]: Finished difference. Result has 232 places, 308 transitions, 3878 flow [2024-06-04 15:36:54,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3701, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3878, PETRI_PLACES=232, PETRI_TRANSITIONS=308} [2024-06-04 15:36:54,980 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2024-06-04 15:36:54,980 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 308 transitions, 3878 flow [2024-06-04 15:36:54,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:54,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:54,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:54,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-04 15:36:54,981 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)] === [2024-06-04 15:36:54,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:54,981 INFO L85 PathProgramCache]: Analyzing trace with hash 617383833, now seen corresponding path program 1 times [2024-06-04 15:36:54,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:54,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958939694] [2024-06-04 15:36:54,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:54,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:54,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:55,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:55,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:55,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958939694] [2024-06-04 15:36:55,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958939694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:55,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:55,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:36:55,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598362770] [2024-06-04 15:36:55,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:55,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:36:55,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:55,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:36:55,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:36:55,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:36:55,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 308 transitions, 3878 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:55,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:55,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:36:55,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:56,724 INFO L124 PetriNetUnfolderBase]: 2326/3633 cut-off events. [2024-06-04 15:36:56,724 INFO L125 PetriNetUnfolderBase]: For 132315/132317 co-relation queries the response was YES. [2024-06-04 15:36:56,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24829 conditions, 3633 events. 2326/3633 cut-off events. For 132315/132317 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 19368 event pairs, 504 based on Foata normal form. 12/3636 useless extension candidates. Maximal degree in co-relation 24716. Up to 3388 conditions per place. [2024-06-04 15:36:56,762 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 280 selfloop transitions, 41 changer transitions 0/325 dead transitions. [2024-06-04 15:36:56,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 325 transitions, 4638 flow [2024-06-04 15:36:56,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:36:56,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:36:56,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-04 15:36:56,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-04 15:36:56,764 INFO L175 Difference]: Start difference. First operand has 232 places, 308 transitions, 3878 flow. Second operand 6 states and 110 transitions. [2024-06-04 15:36:56,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 325 transitions, 4638 flow [2024-06-04 15:36:57,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 325 transitions, 4531 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-04 15:36:57,098 INFO L231 Difference]: Finished difference. Result has 232 places, 309 transitions, 3875 flow [2024-06-04 15:36:57,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3771, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3875, PETRI_PLACES=232, PETRI_TRANSITIONS=309} [2024-06-04 15:36:57,099 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2024-06-04 15:36:57,099 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 309 transitions, 3875 flow [2024-06-04 15:36:57,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:57,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:57,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:57,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-04 15:36:57,099 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)] === [2024-06-04 15:36:57,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:57,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1444910909, now seen corresponding path program 4 times [2024-06-04 15:36:57,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:57,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723456942] [2024-06-04 15:36:57,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:57,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:57,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:57,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:57,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:57,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723456942] [2024-06-04 15:36:57,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723456942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:57,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:57,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:36:57,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938199630] [2024-06-04 15:36:57,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:57,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:36:57,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:57,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:36:57,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:36:57,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:36:57,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 309 transitions, 3875 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:57,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:57,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:36:57,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:58,701 INFO L124 PetriNetUnfolderBase]: 2388/3732 cut-off events. [2024-06-04 15:36:58,701 INFO L125 PetriNetUnfolderBase]: For 125728/125737 co-relation queries the response was YES. [2024-06-04 15:36:58,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25454 conditions, 3732 events. 2388/3732 cut-off events. For 125728/125737 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 20017 event pairs, 498 based on Foata normal form. 10/3737 useless extension candidates. Maximal degree in co-relation 25342. Up to 3473 conditions per place. [2024-06-04 15:36:58,740 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 288 selfloop transitions, 54 changer transitions 0/346 dead transitions. [2024-06-04 15:36:58,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 346 transitions, 4941 flow [2024-06-04 15:36:58,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:36:58,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:36:58,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-04 15:36:58,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-04 15:36:58,742 INFO L175 Difference]: Start difference. First operand has 232 places, 309 transitions, 3875 flow. Second operand 9 states and 157 transitions. [2024-06-04 15:36:58,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 346 transitions, 4941 flow [2024-06-04 15:36:59,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 346 transitions, 4863 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-04 15:36:59,050 INFO L231 Difference]: Finished difference. Result has 237 places, 318 transitions, 4053 flow [2024-06-04 15:36:59,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3797, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4053, PETRI_PLACES=237, PETRI_TRANSITIONS=318} [2024-06-04 15:36:59,051 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 195 predicate places. [2024-06-04 15:36:59,051 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 318 transitions, 4053 flow [2024-06-04 15:36:59,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:59,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:59,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:59,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-04 15:36:59,051 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:59,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:59,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1251989695, now seen corresponding path program 5 times [2024-06-04 15:36:59,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:59,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289428423] [2024-06-04 15:36:59,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:59,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:59,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:59,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:59,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:59,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289428423] [2024-06-04 15:36:59,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289428423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:59,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:59,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:36:59,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77637796] [2024-06-04 15:36:59,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:59,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:36:59,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:59,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:36:59,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:36:59,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:36:59,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 318 transitions, 4053 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:59,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:59,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:36:59,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:00,589 INFO L124 PetriNetUnfolderBase]: 2408/3766 cut-off events. [2024-06-04 15:37:00,590 INFO L125 PetriNetUnfolderBase]: For 132937/132946 co-relation queries the response was YES. [2024-06-04 15:37:00,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26118 conditions, 3766 events. 2408/3766 cut-off events. For 132937/132946 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 20260 event pairs, 502 based on Foata normal form. 10/3771 useless extension candidates. Maximal degree in co-relation 26005. Up to 3529 conditions per place. [2024-06-04 15:37:00,630 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 284 selfloop transitions, 53 changer transitions 0/341 dead transitions. [2024-06-04 15:37:00,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 341 transitions, 4906 flow [2024-06-04 15:37:00,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:37:00,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:37:00,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-04 15:37:00,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-04 15:37:00,631 INFO L175 Difference]: Start difference. First operand has 237 places, 318 transitions, 4053 flow. Second operand 8 states and 138 transitions. [2024-06-04 15:37:00,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 341 transitions, 4906 flow [2024-06-04 15:37:00,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 341 transitions, 4678 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-04 15:37:00,954 INFO L231 Difference]: Finished difference. Result has 239 places, 321 transitions, 3999 flow [2024-06-04 15:37:00,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3839, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3999, PETRI_PLACES=239, PETRI_TRANSITIONS=321} [2024-06-04 15:37:00,954 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 197 predicate places. [2024-06-04 15:37:00,954 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 321 transitions, 3999 flow [2024-06-04 15:37:00,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:00,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:00,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:00,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-04 15:37:00,955 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:37:00,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:00,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1799589659, now seen corresponding path program 6 times [2024-06-04 15:37:00,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:00,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204625384] [2024-06-04 15:37:00,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:00,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:00,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:01,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:01,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:01,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204625384] [2024-06-04 15:37:01,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204625384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:01,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:01,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:37:01,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777336424] [2024-06-04 15:37:01,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:01,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:37:01,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:01,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:37:01,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:37:01,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:37:01,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 321 transitions, 3999 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:01,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:01,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:37:01,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:02,245 INFO L124 PetriNetUnfolderBase]: 2452/3831 cut-off events. [2024-06-04 15:37:02,245 INFO L125 PetriNetUnfolderBase]: For 140210/140219 co-relation queries the response was YES. [2024-06-04 15:37:02,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26587 conditions, 3831 events. 2452/3831 cut-off events. For 140210/140219 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 20655 event pairs, 511 based on Foata normal form. 10/3836 useless extension candidates. Maximal degree in co-relation 26475. Up to 3429 conditions per place. [2024-06-04 15:37:02,286 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 267 selfloop transitions, 82 changer transitions 0/353 dead transitions. [2024-06-04 15:37:02,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 353 transitions, 5056 flow [2024-06-04 15:37:02,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:37:02,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:37:02,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-04 15:37:02,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-04 15:37:02,287 INFO L175 Difference]: Start difference. First operand has 239 places, 321 transitions, 3999 flow. Second operand 8 states and 144 transitions. [2024-06-04 15:37:02,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 353 transitions, 5056 flow [2024-06-04 15:37:02,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 353 transitions, 4906 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-04 15:37:02,624 INFO L231 Difference]: Finished difference. Result has 241 places, 330 transitions, 4193 flow [2024-06-04 15:37:02,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3851, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4193, PETRI_PLACES=241, PETRI_TRANSITIONS=330} [2024-06-04 15:37:02,625 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 199 predicate places. [2024-06-04 15:37:02,625 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 330 transitions, 4193 flow [2024-06-04 15:37:02,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:02,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:02,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:02,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-04 15:37:02,625 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:37:02,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:02,626 INFO L85 PathProgramCache]: Analyzing trace with hash 2004471131, now seen corresponding path program 7 times [2024-06-04 15:37:02,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:02,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996552319] [2024-06-04 15:37:02,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:02,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:02,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:03,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:03,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:03,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996552319] [2024-06-04 15:37:03,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996552319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:03,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:03,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:37:03,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726385260] [2024-06-04 15:37:03,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:03,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:37:03,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:03,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:37:03,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:37:03,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:37:03,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 330 transitions, 4193 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:03,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:03,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:37:03,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:04,110 INFO L124 PetriNetUnfolderBase]: 2440/3815 cut-off events. [2024-06-04 15:37:04,110 INFO L125 PetriNetUnfolderBase]: For 139979/139988 co-relation queries the response was YES. [2024-06-04 15:37:04,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26964 conditions, 3815 events. 2440/3815 cut-off events. For 139979/139988 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 20588 event pairs, 506 based on Foata normal form. 10/3820 useless extension candidates. Maximal degree in co-relation 26851. Up to 3542 conditions per place. [2024-06-04 15:37:04,151 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 293 selfloop transitions, 55 changer transitions 0/352 dead transitions. [2024-06-04 15:37:04,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 352 transitions, 5019 flow [2024-06-04 15:37:04,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:37:04,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:37:04,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-04 15:37:04,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425087108013937 [2024-06-04 15:37:04,153 INFO L175 Difference]: Start difference. First operand has 241 places, 330 transitions, 4193 flow. Second operand 7 states and 127 transitions. [2024-06-04 15:37:04,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 352 transitions, 5019 flow [2024-06-04 15:37:04,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 352 transitions, 4889 flow, removed 48 selfloop flow, removed 3 redundant places. [2024-06-04 15:37:04,493 INFO L231 Difference]: Finished difference. Result has 245 places, 330 transitions, 4187 flow [2024-06-04 15:37:04,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4063, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4187, PETRI_PLACES=245, PETRI_TRANSITIONS=330} [2024-06-04 15:37:04,493 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 203 predicate places. [2024-06-04 15:37:04,493 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 330 transitions, 4187 flow [2024-06-04 15:37:04,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:04,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:04,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:04,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-04 15:37:04,494 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:37:04,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:04,495 INFO L85 PathProgramCache]: Analyzing trace with hash 2004483221, now seen corresponding path program 8 times [2024-06-04 15:37:04,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:04,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988021321] [2024-06-04 15:37:04,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:04,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:04,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:05,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:05,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:05,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988021321] [2024-06-04 15:37:05,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988021321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:05,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:05,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:37:05,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104843768] [2024-06-04 15:37:05,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:05,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:37:05,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:05,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:37:05,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:37:05,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:37:05,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 330 transitions, 4187 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:05,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:05,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:37:05,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:06,025 INFO L124 PetriNetUnfolderBase]: 2460/3847 cut-off events. [2024-06-04 15:37:06,026 INFO L125 PetriNetUnfolderBase]: For 142214/142223 co-relation queries the response was YES. [2024-06-04 15:37:06,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26861 conditions, 3847 events. 2460/3847 cut-off events. For 142214/142223 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 20794 event pairs, 499 based on Foata normal form. 10/3852 useless extension candidates. Maximal degree in co-relation 26745. Up to 3437 conditions per place. [2024-06-04 15:37:06,066 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 266 selfloop transitions, 84 changer transitions 0/354 dead transitions. [2024-06-04 15:37:06,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 354 transitions, 5166 flow [2024-06-04 15:37:06,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:37:06,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:37:06,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-04 15:37:06,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-04 15:37:06,067 INFO L175 Difference]: Start difference. First operand has 245 places, 330 transitions, 4187 flow. Second operand 7 states and 129 transitions. [2024-06-04 15:37:06,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 354 transitions, 5166 flow [2024-06-04 15:37:06,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 354 transitions, 5067 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-04 15:37:06,359 INFO L231 Difference]: Finished difference. Result has 246 places, 333 transitions, 4332 flow [2024-06-04 15:37:06,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4092, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4332, PETRI_PLACES=246, PETRI_TRANSITIONS=333} [2024-06-04 15:37:06,360 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2024-06-04 15:37:06,360 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 333 transitions, 4332 flow [2024-06-04 15:37:06,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:06,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:06,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:06,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-04 15:37:06,361 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:37:06,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:06,361 INFO L85 PathProgramCache]: Analyzing trace with hash -2062179305, now seen corresponding path program 9 times [2024-06-04 15:37:06,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:06,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635035030] [2024-06-04 15:37:06,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:06,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:06,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:06,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:06,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:06,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635035030] [2024-06-04 15:37:06,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635035030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:06,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:06,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:37:06,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771324460] [2024-06-04 15:37:06,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:06,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:37:06,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:06,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:37:06,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:37:07,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:37:07,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 333 transitions, 4332 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:07,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:07,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:37:07,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:07,741 INFO L124 PetriNetUnfolderBase]: 2480/3878 cut-off events. [2024-06-04 15:37:07,741 INFO L125 PetriNetUnfolderBase]: For 138641/138650 co-relation queries the response was YES. [2024-06-04 15:37:07,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27166 conditions, 3878 events. 2480/3878 cut-off events. For 138641/138650 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 21004 event pairs, 520 based on Foata normal form. 10/3883 useless extension candidates. Maximal degree in co-relation 27050. Up to 3672 conditions per place. [2024-06-04 15:37:07,783 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 310 selfloop transitions, 38 changer transitions 0/352 dead transitions. [2024-06-04 15:37:07,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 352 transitions, 5275 flow [2024-06-04 15:37:07,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:37:07,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:37:07,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-04 15:37:07,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42160278745644597 [2024-06-04 15:37:07,788 INFO L175 Difference]: Start difference. First operand has 246 places, 333 transitions, 4332 flow. Second operand 7 states and 121 transitions. [2024-06-04 15:37:07,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 352 transitions, 5275 flow [2024-06-04 15:37:08,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 352 transitions, 5090 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-04 15:37:08,128 INFO L231 Difference]: Finished difference. Result has 247 places, 336 transitions, 4299 flow [2024-06-04 15:37:08,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4152, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4299, PETRI_PLACES=247, PETRI_TRANSITIONS=336} [2024-06-04 15:37:08,129 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 205 predicate places. [2024-06-04 15:37:08,129 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 336 transitions, 4299 flow [2024-06-04 15:37:08,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:08,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:08,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:08,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-04 15:37:08,130 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:37:08,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:08,130 INFO L85 PathProgramCache]: Analyzing trace with hash -2067893225, now seen corresponding path program 10 times [2024-06-04 15:37:08,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:08,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197571310] [2024-06-04 15:37:08,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:08,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:08,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:08,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:08,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:08,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197571310] [2024-06-04 15:37:08,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197571310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:08,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:08,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:37:08,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760473920] [2024-06-04 15:37:08,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:08,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:37:08,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:08,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:37:08,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:37:08,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:37:08,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 336 transitions, 4299 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:08,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:08,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:37:08,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:09,485 INFO L124 PetriNetUnfolderBase]: 2468/3862 cut-off events. [2024-06-04 15:37:09,485 INFO L125 PetriNetUnfolderBase]: For 134658/134667 co-relation queries the response was YES. [2024-06-04 15:37:09,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26530 conditions, 3862 events. 2468/3862 cut-off events. For 134658/134667 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 20916 event pairs, 522 based on Foata normal form. 10/3867 useless extension candidates. Maximal degree in co-relation 26415. Up to 3700 conditions per place. [2024-06-04 15:37:09,524 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 315 selfloop transitions, 30 changer transitions 0/349 dead transitions. [2024-06-04 15:37:09,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 349 transitions, 5056 flow [2024-06-04 15:37:09,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:37:09,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:37:09,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-04 15:37:09,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076655052264808 [2024-06-04 15:37:09,532 INFO L175 Difference]: Start difference. First operand has 247 places, 336 transitions, 4299 flow. Second operand 7 states and 117 transitions. [2024-06-04 15:37:09,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 349 transitions, 5056 flow [2024-06-04 15:37:09,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 349 transitions, 4812 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-04 15:37:09,893 INFO L231 Difference]: Finished difference. Result has 248 places, 336 transitions, 4121 flow [2024-06-04 15:37:09,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4055, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4121, PETRI_PLACES=248, PETRI_TRANSITIONS=336} [2024-06-04 15:37:09,894 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 206 predicate places. [2024-06-04 15:37:09,894 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 336 transitions, 4121 flow [2024-06-04 15:37:09,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:09,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:09,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:09,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-04 15:37:09,895 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)] === [2024-06-04 15:37:09,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:09,895 INFO L85 PathProgramCache]: Analyzing trace with hash -2067466727, now seen corresponding path program 2 times [2024-06-04 15:37:09,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:09,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88770195] [2024-06-04 15:37:09,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:09,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:09,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:10,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:10,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:10,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88770195] [2024-06-04 15:37:10,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88770195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:10,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:10,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:37:10,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793372264] [2024-06-04 15:37:10,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:10,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:37:10,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:10,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:37:10,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:37:10,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:37:10,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 336 transitions, 4121 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:10,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:10,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:37:10,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:11,644 INFO L124 PetriNetUnfolderBase]: 2542/3972 cut-off events. [2024-06-04 15:37:11,644 INFO L125 PetriNetUnfolderBase]: For 148406/148408 co-relation queries the response was YES. [2024-06-04 15:37:11,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27186 conditions, 3972 events. 2542/3972 cut-off events. For 148406/148408 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 21541 event pairs, 530 based on Foata normal form. 8/3971 useless extension candidates. Maximal degree in co-relation 27072. Up to 3573 conditions per place. [2024-06-04 15:37:11,684 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 311 selfloop transitions, 45 changer transitions 0/360 dead transitions. [2024-06-04 15:37:11,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 360 transitions, 5109 flow [2024-06-04 15:37:11,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:37:11,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:37:11,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-04 15:37:11,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-04 15:37:11,686 INFO L175 Difference]: Start difference. First operand has 248 places, 336 transitions, 4121 flow. Second operand 7 states and 126 transitions. [2024-06-04 15:37:11,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 360 transitions, 5109 flow [2024-06-04 15:37:12,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 360 transitions, 4971 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-04 15:37:12,097 INFO L231 Difference]: Finished difference. Result has 248 places, 338 transitions, 4107 flow [2024-06-04 15:37:12,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3983, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4107, PETRI_PLACES=248, PETRI_TRANSITIONS=338} [2024-06-04 15:37:12,097 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 206 predicate places. [2024-06-04 15:37:12,097 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 338 transitions, 4107 flow [2024-06-04 15:37:12,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:12,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:12,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:12,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-04 15:37:12,098 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)] === [2024-06-04 15:37:12,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:12,098 INFO L85 PathProgramCache]: Analyzing trace with hash -2054074727, now seen corresponding path program 3 times [2024-06-04 15:37:12,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:12,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185696661] [2024-06-04 15:37:12,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:12,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:12,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:12,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:12,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:12,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185696661] [2024-06-04 15:37:12,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185696661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:12,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:12,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:37:12,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618123806] [2024-06-04 15:37:12,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:12,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:37:12,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:12,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:37:12,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:37:12,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:37:12,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 338 transitions, 4107 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:12,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:12,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:37:12,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:13,777 INFO L124 PetriNetUnfolderBase]: 2514/3932 cut-off events. [2024-06-04 15:37:13,778 INFO L125 PetriNetUnfolderBase]: For 147900/147902 co-relation queries the response was YES. [2024-06-04 15:37:13,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26529 conditions, 3932 events. 2514/3932 cut-off events. For 147900/147902 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 21320 event pairs, 530 based on Foata normal form. 12/3935 useless extension candidates. Maximal degree in co-relation 26415. Up to 3651 conditions per place. [2024-06-04 15:37:13,820 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 310 selfloop transitions, 43 changer transitions 0/357 dead transitions. [2024-06-04 15:37:13,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 357 transitions, 4955 flow [2024-06-04 15:37:13,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:37:13,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:37:13,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-04 15:37:13,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-04 15:37:13,822 INFO L175 Difference]: Start difference. First operand has 248 places, 338 transitions, 4107 flow. Second operand 7 states and 124 transitions. [2024-06-04 15:37:13,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 357 transitions, 4955 flow [2024-06-04 15:37:14,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 357 transitions, 4901 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-04 15:37:14,234 INFO L231 Difference]: Finished difference. Result has 252 places, 338 transitions, 4144 flow [2024-06-04 15:37:14,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4053, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4144, PETRI_PLACES=252, PETRI_TRANSITIONS=338} [2024-06-04 15:37:14,234 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 210 predicate places. [2024-06-04 15:37:14,234 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 338 transitions, 4144 flow [2024-06-04 15:37:14,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:14,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:14,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:14,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-04 15:37:14,235 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)] === [2024-06-04 15:37:14,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:14,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1681271711, now seen corresponding path program 1 times [2024-06-04 15:37:14,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:14,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006597005] [2024-06-04 15:37:14,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:14,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:14,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:15,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:15,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:15,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006597005] [2024-06-04 15:37:15,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006597005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:15,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:15,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:37:15,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109890546] [2024-06-04 15:37:15,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:15,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:37:15,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:15,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:37:15,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:37:15,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-04 15:37:15,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 338 transitions, 4144 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:15,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:15,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-04 15:37:15,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:15,942 INFO L124 PetriNetUnfolderBase]: 2452/3861 cut-off events. [2024-06-04 15:37:15,942 INFO L125 PetriNetUnfolderBase]: For 146314/146353 co-relation queries the response was YES. [2024-06-04 15:37:15,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26266 conditions, 3861 events. 2452/3861 cut-off events. For 146314/146353 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 21196 event pairs, 456 based on Foata normal form. 10/3847 useless extension candidates. Maximal degree in co-relation 26150. Up to 3443 conditions per place. [2024-06-04 15:37:15,982 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 298 selfloop transitions, 70 changer transitions 0/394 dead transitions. [2024-06-04 15:37:15,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 394 transitions, 5402 flow [2024-06-04 15:37:15,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:37:15,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:37:15,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-04 15:37:15,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-04 15:37:15,984 INFO L175 Difference]: Start difference. First operand has 252 places, 338 transitions, 4144 flow. Second operand 9 states and 164 transitions. [2024-06-04 15:37:15,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 394 transitions, 5402 flow [2024-06-04 15:37:16,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 394 transitions, 5306 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-04 15:37:16,310 INFO L231 Difference]: Finished difference. Result has 258 places, 366 transitions, 4653 flow [2024-06-04 15:37:16,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4048, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4653, PETRI_PLACES=258, PETRI_TRANSITIONS=366} [2024-06-04 15:37:16,311 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 216 predicate places. [2024-06-04 15:37:16,311 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 366 transitions, 4653 flow [2024-06-04 15:37:16,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:16,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:16,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:16,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-04 15:37:16,312 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)] === [2024-06-04 15:37:16,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:16,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1134148031, now seen corresponding path program 1 times [2024-06-04 15:37:16,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:16,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677052010] [2024-06-04 15:37:16,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:16,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:16,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:17,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:17,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:17,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677052010] [2024-06-04 15:37:17,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677052010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:17,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:17,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:37:17,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146470949] [2024-06-04 15:37:17,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:17,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:37:17,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:17,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:37:17,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:37:17,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:37:17,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 366 transitions, 4653 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:17,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:17,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:37:17,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:18,078 INFO L124 PetriNetUnfolderBase]: 2545/3979 cut-off events. [2024-06-04 15:37:18,078 INFO L125 PetriNetUnfolderBase]: For 151836/151838 co-relation queries the response was YES. [2024-06-04 15:37:18,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27540 conditions, 3979 events. 2545/3979 cut-off events. For 151836/151838 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 21730 event pairs, 582 based on Foata normal form. 2/3979 useless extension candidates. Maximal degree in co-relation 27420. Up to 3703 conditions per place. [2024-06-04 15:37:18,123 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 337 selfloop transitions, 71 changer transitions 0/412 dead transitions. [2024-06-04 15:37:18,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 412 transitions, 5978 flow [2024-06-04 15:37:18,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:37:18,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:37:18,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-04 15:37:18,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-04 15:37:18,124 INFO L175 Difference]: Start difference. First operand has 258 places, 366 transitions, 4653 flow. Second operand 9 states and 162 transitions. [2024-06-04 15:37:18,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 412 transitions, 5978 flow [2024-06-04 15:37:18,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 412 transitions, 5883 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-06-04 15:37:18,703 INFO L231 Difference]: Finished difference. Result has 268 places, 383 transitions, 4987 flow [2024-06-04 15:37:18,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4558, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4987, PETRI_PLACES=268, PETRI_TRANSITIONS=383} [2024-06-04 15:37:18,703 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 226 predicate places. [2024-06-04 15:37:18,703 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 383 transitions, 4987 flow [2024-06-04 15:37:18,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:18,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:18,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:18,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-04 15:37:18,704 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)] === [2024-06-04 15:37:18,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:18,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1134147907, now seen corresponding path program 2 times [2024-06-04 15:37:18,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:18,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793678549] [2024-06-04 15:37:18,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:18,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:18,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:19,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:19,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:19,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793678549] [2024-06-04 15:37:19,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793678549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:19,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:19,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:37:19,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576118298] [2024-06-04 15:37:19,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:19,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:37:19,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:19,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:37:19,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:37:19,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-04 15:37:19,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 383 transitions, 4987 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:19,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:19,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-04 15:37:19,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:20,525 INFO L124 PetriNetUnfolderBase]: 2491/3916 cut-off events. [2024-06-04 15:37:20,525 INFO L125 PetriNetUnfolderBase]: For 160948/160987 co-relation queries the response was YES. [2024-06-04 15:37:20,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27655 conditions, 3916 events. 2491/3916 cut-off events. For 160948/160987 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 21502 event pairs, 498 based on Foata normal form. 10/3902 useless extension candidates. Maximal degree in co-relation 27530. Up to 3549 conditions per place. [2024-06-04 15:37:20,570 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 304 selfloop transitions, 77 changer transitions 0/411 dead transitions. [2024-06-04 15:37:20,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 411 transitions, 5878 flow [2024-06-04 15:37:20,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:37:20,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:37:20,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-04 15:37:20,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-04 15:37:20,571 INFO L175 Difference]: Start difference. First operand has 268 places, 383 transitions, 4987 flow. Second operand 9 states and 159 transitions. [2024-06-04 15:37:20,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 411 transitions, 5878 flow [2024-06-04 15:37:21,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 411 transitions, 5757 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-04 15:37:21,135 INFO L231 Difference]: Finished difference. Result has 273 places, 388 transitions, 5082 flow [2024-06-04 15:37:21,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4866, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5082, PETRI_PLACES=273, PETRI_TRANSITIONS=388} [2024-06-04 15:37:21,135 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 231 predicate places. [2024-06-04 15:37:21,136 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 388 transitions, 5082 flow [2024-06-04 15:37:21,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:21,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:21,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:21,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-04 15:37:21,136 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:37:21,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:21,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1684128795, now seen corresponding path program 2 times [2024-06-04 15:37:21,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:21,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662097438] [2024-06-04 15:37:21,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:21,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:21,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:22,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:22,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:22,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662097438] [2024-06-04 15:37:22,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662097438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:22,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:22,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:37:22,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87259610] [2024-06-04 15:37:22,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:22,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:37:22,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:22,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:37:22,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:37:22,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:37:22,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 388 transitions, 5082 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:22,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:22,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:37:22,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:23,076 INFO L124 PetriNetUnfolderBase]: 2576/4024 cut-off events. [2024-06-04 15:37:23,077 INFO L125 PetriNetUnfolderBase]: For 165092/165094 co-relation queries the response was YES. [2024-06-04 15:37:23,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28565 conditions, 4024 events. 2576/4024 cut-off events. For 165092/165094 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 21988 event pairs, 581 based on Foata normal form. 2/4024 useless extension candidates. Maximal degree in co-relation 28439. Up to 3812 conditions per place. [2024-06-04 15:37:23,123 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 354 selfloop transitions, 57 changer transitions 0/415 dead transitions. [2024-06-04 15:37:23,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 415 transitions, 6040 flow [2024-06-04 15:37:23,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:37:23,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:37:23,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-04 15:37:23,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4073170731707317 [2024-06-04 15:37:23,124 INFO L175 Difference]: Start difference. First operand has 273 places, 388 transitions, 5082 flow. Second operand 10 states and 167 transitions. [2024-06-04 15:37:23,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 415 transitions, 6040 flow [2024-06-04 15:37:23,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 415 transitions, 5872 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-04 15:37:23,618 INFO L231 Difference]: Finished difference. Result has 278 places, 393 transitions, 5101 flow [2024-06-04 15:37:23,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4918, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5101, PETRI_PLACES=278, PETRI_TRANSITIONS=393} [2024-06-04 15:37:23,618 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 236 predicate places. [2024-06-04 15:37:23,619 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 393 transitions, 5101 flow [2024-06-04 15:37:23,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:23,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:23,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:23,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-04 15:37:23,619 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:37:23,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:23,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1684128671, now seen corresponding path program 3 times [2024-06-04 15:37:23,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:23,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583393318] [2024-06-04 15:37:23,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:23,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:23,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:24,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:24,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:24,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583393318] [2024-06-04 15:37:24,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583393318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:24,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:24,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:37:24,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479003280] [2024-06-04 15:37:24,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:24,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:37:24,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:24,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:37:24,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:37:24,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-04 15:37:24,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 393 transitions, 5101 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:24,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:24,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-04 15:37:24,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:25,560 INFO L124 PetriNetUnfolderBase]: 2563/4022 cut-off events. [2024-06-04 15:37:25,561 INFO L125 PetriNetUnfolderBase]: For 184765/184804 co-relation queries the response was YES. [2024-06-04 15:37:25,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28498 conditions, 4022 events. 2563/4022 cut-off events. For 184765/184804 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 22125 event pairs, 506 based on Foata normal form. 20/4018 useless extension candidates. Maximal degree in co-relation 28370. Up to 3551 conditions per place. [2024-06-04 15:37:25,601 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 296 selfloop transitions, 96 changer transitions 0/424 dead transitions. [2024-06-04 15:37:25,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 424 transitions, 6072 flow [2024-06-04 15:37:25,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:37:25,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:37:25,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-04 15:37:25,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-04 15:37:25,602 INFO L175 Difference]: Start difference. First operand has 278 places, 393 transitions, 5101 flow. Second operand 9 states and 163 transitions. [2024-06-04 15:37:25,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 424 transitions, 6072 flow [2024-06-04 15:37:26,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 424 transitions, 5987 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-04 15:37:26,134 INFO L231 Difference]: Finished difference. Result has 282 places, 399 transitions, 5304 flow [2024-06-04 15:37:26,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5016, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5304, PETRI_PLACES=282, PETRI_TRANSITIONS=399} [2024-06-04 15:37:26,134 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 240 predicate places. [2024-06-04 15:37:26,134 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 399 transitions, 5304 flow [2024-06-04 15:37:26,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:26,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:26,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:26,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-04 15:37:26,135 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:37:26,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:26,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1799604539, now seen corresponding path program 1 times [2024-06-04 15:37:26,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:26,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791303612] [2024-06-04 15:37:26,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:26,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:26,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:27,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:27,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:27,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791303612] [2024-06-04 15:37:27,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791303612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:27,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:27,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:37:27,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941190947] [2024-06-04 15:37:27,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:27,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:37:27,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:27,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:37:27,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:37:27,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:37:27,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 399 transitions, 5304 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:27,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:27,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:37:27,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:27,873 INFO L124 PetriNetUnfolderBase]: 2641/4123 cut-off events. [2024-06-04 15:37:27,873 INFO L125 PetriNetUnfolderBase]: For 178070/178072 co-relation queries the response was YES. [2024-06-04 15:37:27,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29636 conditions, 4123 events. 2641/4123 cut-off events. For 178070/178072 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 22616 event pairs, 591 based on Foata normal form. 2/4123 useless extension candidates. Maximal degree in co-relation 29505. Up to 3978 conditions per place. [2024-06-04 15:37:27,920 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 385 selfloop transitions, 28 changer transitions 0/417 dead transitions. [2024-06-04 15:37:27,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 417 transitions, 6210 flow [2024-06-04 15:37:27,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:37:27,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:37:27,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-04 15:37:27,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-04 15:37:27,929 INFO L175 Difference]: Start difference. First operand has 282 places, 399 transitions, 5304 flow. Second operand 8 states and 134 transitions. [2024-06-04 15:37:27,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 417 transitions, 6210 flow [2024-06-04 15:37:28,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 417 transitions, 6017 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-04 15:37:28,471 INFO L231 Difference]: Finished difference. Result has 284 places, 401 transitions, 5202 flow [2024-06-04 15:37:28,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5111, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5202, PETRI_PLACES=284, PETRI_TRANSITIONS=401} [2024-06-04 15:37:28,481 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 242 predicate places. [2024-06-04 15:37:28,481 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 401 transitions, 5202 flow [2024-06-04 15:37:28,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:28,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:28,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:28,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-04 15:37:28,482 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:37:28,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:28,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1799424615, now seen corresponding path program 3 times [2024-06-04 15:37:28,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:28,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465011233] [2024-06-04 15:37:28,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:28,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:28,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:29,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:29,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:29,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465011233] [2024-06-04 15:37:29,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465011233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:29,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:29,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:37:29,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380779972] [2024-06-04 15:37:29,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:29,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:37:29,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:29,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:37:29,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:37:29,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:37:29,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 401 transitions, 5202 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:29,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:29,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:37:29,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:30,290 INFO L124 PetriNetUnfolderBase]: 2651/4137 cut-off events. [2024-06-04 15:37:30,290 INFO L125 PetriNetUnfolderBase]: For 183515/183517 co-relation queries the response was YES. [2024-06-04 15:37:30,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29704 conditions, 4137 events. 2651/4137 cut-off events. For 183515/183517 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 22714 event pairs, 587 based on Foata normal form. 2/4137 useless extension candidates. Maximal degree in co-relation 29572. Up to 3967 conditions per place. [2024-06-04 15:37:30,343 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 377 selfloop transitions, 42 changer transitions 0/423 dead transitions. [2024-06-04 15:37:30,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 423 transitions, 6157 flow [2024-06-04 15:37:30,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:37:30,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:37:30,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-04 15:37:30,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-04 15:37:30,345 INFO L175 Difference]: Start difference. First operand has 284 places, 401 transitions, 5202 flow. Second operand 9 states and 153 transitions. [2024-06-04 15:37:30,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 423 transitions, 6157 flow [2024-06-04 15:37:30,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 423 transitions, 6082 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-04 15:37:30,902 INFO L231 Difference]: Finished difference. Result has 287 places, 404 transitions, 5262 flow [2024-06-04 15:37:30,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5127, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5262, PETRI_PLACES=287, PETRI_TRANSITIONS=404} [2024-06-04 15:37:30,903 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 245 predicate places. [2024-06-04 15:37:30,903 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 404 transitions, 5262 flow [2024-06-04 15:37:30,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:30,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:30,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:30,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-04 15:37:30,904 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:37:30,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:30,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1252413341, now seen corresponding path program 4 times [2024-06-04 15:37:30,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:30,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265889240] [2024-06-04 15:37:30,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:30,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:30,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:31,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:31,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:31,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265889240] [2024-06-04 15:37:31,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265889240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:31,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:31,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:37:31,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120114866] [2024-06-04 15:37:31,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:31,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:37:31,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:31,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:37:31,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:37:31,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:37:31,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 404 transitions, 5262 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:31,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:31,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:37:31,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:32,913 INFO L124 PetriNetUnfolderBase]: 2661/4151 cut-off events. [2024-06-04 15:37:32,914 INFO L125 PetriNetUnfolderBase]: For 190045/190047 co-relation queries the response was YES. [2024-06-04 15:37:32,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29958 conditions, 4151 events. 2661/4151 cut-off events. For 190045/190047 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 22788 event pairs, 587 based on Foata normal form. 2/4151 useless extension candidates. Maximal degree in co-relation 29825. Up to 3987 conditions per place. [2024-06-04 15:37:32,956 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 386 selfloop transitions, 38 changer transitions 0/428 dead transitions. [2024-06-04 15:37:32,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 428 transitions, 6237 flow [2024-06-04 15:37:32,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:37:32,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:37:32,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2024-06-04 15:37:32,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-04 15:37:32,957 INFO L175 Difference]: Start difference. First operand has 287 places, 404 transitions, 5262 flow. Second operand 11 states and 176 transitions. [2024-06-04 15:37:32,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 428 transitions, 6237 flow [2024-06-04 15:37:33,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 428 transitions, 6133 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-04 15:37:33,627 INFO L231 Difference]: Finished difference. Result has 291 places, 407 transitions, 5291 flow [2024-06-04 15:37:33,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5158, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5291, PETRI_PLACES=291, PETRI_TRANSITIONS=407} [2024-06-04 15:37:33,628 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 249 predicate places. [2024-06-04 15:37:33,628 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 407 transitions, 5291 flow [2024-06-04 15:37:33,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:33,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:33,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:33,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-04 15:37:33,629 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:37:33,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:33,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1252235587, now seen corresponding path program 4 times [2024-06-04 15:37:33,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:33,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66626569] [2024-06-04 15:37:33,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:33,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:33,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:34,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:34,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:34,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66626569] [2024-06-04 15:37:34,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66626569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:34,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:34,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:37:34,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793697515] [2024-06-04 15:37:34,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:34,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:37:34,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:34,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:37:34,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:37:34,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-04 15:37:34,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 407 transitions, 5291 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:34,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:34,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-04 15:37:34,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:35,774 INFO L124 PetriNetUnfolderBase]: 2636/4134 cut-off events. [2024-06-04 15:37:35,775 INFO L125 PetriNetUnfolderBase]: For 213112/213145 co-relation queries the response was YES. [2024-06-04 15:37:35,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29847 conditions, 4134 events. 2636/4134 cut-off events. For 213112/213145 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 22912 event pairs, 522 based on Foata normal form. 16/4120 useless extension candidates. Maximal degree in co-relation 29713. Up to 3618 conditions per place. [2024-06-04 15:37:35,827 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 290 selfloop transitions, 106 changer transitions 0/431 dead transitions. [2024-06-04 15:37:35,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 431 transitions, 6237 flow [2024-06-04 15:37:35,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:37:35,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:37:35,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-04 15:37:35,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-04 15:37:35,829 INFO L175 Difference]: Start difference. First operand has 291 places, 407 transitions, 5291 flow. Second operand 9 states and 160 transitions. [2024-06-04 15:37:35,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 431 transitions, 6237 flow [2024-06-04 15:37:36,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 431 transitions, 6148 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-04 15:37:36,444 INFO L231 Difference]: Finished difference. Result has 292 places, 410 transitions, 5481 flow [2024-06-04 15:37:36,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5202, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5481, PETRI_PLACES=292, PETRI_TRANSITIONS=410} [2024-06-04 15:37:36,444 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 250 predicate places. [2024-06-04 15:37:36,444 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 410 transitions, 5481 flow [2024-06-04 15:37:36,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:36,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:36,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:36,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-04 15:37:36,445 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:37:36,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:36,445 INFO L85 PathProgramCache]: Analyzing trace with hash 176631031, now seen corresponding path program 5 times [2024-06-04 15:37:36,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:36,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308780198] [2024-06-04 15:37:36,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:36,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:36,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:37,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:37,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:37,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308780198] [2024-06-04 15:37:37,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308780198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:37,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:37,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:37:37,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103816517] [2024-06-04 15:37:37,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:37,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:37:37,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:37,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:37:37,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:37:37,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:37:37,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 410 transitions, 5481 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:37,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:37,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:37:37,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:38,305 INFO L124 PetriNetUnfolderBase]: 2723/4245 cut-off events. [2024-06-04 15:37:38,305 INFO L125 PetriNetUnfolderBase]: For 205014/205016 co-relation queries the response was YES. [2024-06-04 15:37:38,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31073 conditions, 4245 events. 2723/4245 cut-off events. For 205014/205016 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 23385 event pairs, 591 based on Foata normal form. 2/4245 useless extension candidates. Maximal degree in co-relation 30938. Up to 4064 conditions per place. [2024-06-04 15:37:38,358 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 386 selfloop transitions, 46 changer transitions 0/436 dead transitions. [2024-06-04 15:37:38,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 436 transitions, 6511 flow [2024-06-04 15:37:38,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:37:38,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:37:38,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-04 15:37:38,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4073170731707317 [2024-06-04 15:37:38,360 INFO L175 Difference]: Start difference. First operand has 292 places, 410 transitions, 5481 flow. Second operand 10 states and 167 transitions. [2024-06-04 15:37:38,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 436 transitions, 6511 flow [2024-06-04 15:37:39,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 436 transitions, 6280 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-04 15:37:39,140 INFO L231 Difference]: Finished difference. Result has 296 places, 415 transitions, 5446 flow [2024-06-04 15:37:39,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5252, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5446, PETRI_PLACES=296, PETRI_TRANSITIONS=415} [2024-06-04 15:37:39,141 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 254 predicate places. [2024-06-04 15:37:39,141 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 415 transitions, 5446 flow [2024-06-04 15:37:39,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:39,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:39,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:39,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-04 15:37:39,142 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:37:39,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:39,142 INFO L85 PathProgramCache]: Analyzing trace with hash 2004717147, now seen corresponding path program 6 times [2024-06-04 15:37:39,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:39,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505109376] [2024-06-04 15:37:39,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:39,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:39,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:40,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:40,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:40,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505109376] [2024-06-04 15:37:40,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505109376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:40,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:40,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:37:40,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458565339] [2024-06-04 15:37:40,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:40,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:37:40,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:40,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:37:40,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:37:40,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:37:40,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 415 transitions, 5446 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:40,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:40,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:37:40,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:41,021 INFO L124 PetriNetUnfolderBase]: 2741/4270 cut-off events. [2024-06-04 15:37:41,021 INFO L125 PetriNetUnfolderBase]: For 211686/211688 co-relation queries the response was YES. [2024-06-04 15:37:41,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31233 conditions, 4270 events. 2741/4270 cut-off events. For 211686/211688 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 23531 event pairs, 607 based on Foata normal form. 2/4270 useless extension candidates. Maximal degree in co-relation 31096. Up to 4069 conditions per place. [2024-06-04 15:37:41,077 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 400 selfloop transitions, 44 changer transitions 0/448 dead transitions. [2024-06-04 15:37:41,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 448 transitions, 6668 flow [2024-06-04 15:37:41,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:37:41,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:37:41,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-04 15:37:41,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-04 15:37:41,099 INFO L175 Difference]: Start difference. First operand has 296 places, 415 transitions, 5446 flow. Second operand 9 states and 161 transitions. [2024-06-04 15:37:41,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 448 transitions, 6668 flow [2024-06-04 15:37:42,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 448 transitions, 6588 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-04 15:37:42,051 INFO L231 Difference]: Finished difference. Result has 300 places, 422 transitions, 5604 flow [2024-06-04 15:37:42,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5366, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5604, PETRI_PLACES=300, PETRI_TRANSITIONS=422} [2024-06-04 15:37:42,052 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 258 predicate places. [2024-06-04 15:37:42,052 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 422 transitions, 5604 flow [2024-06-04 15:37:42,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:42,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:42,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:42,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-04 15:37:42,053 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:37:42,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:42,053 INFO L85 PathProgramCache]: Analyzing trace with hash -2053593545, now seen corresponding path program 2 times [2024-06-04 15:37:42,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:42,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087383037] [2024-06-04 15:37:42,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:42,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:42,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:42,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:42,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:42,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087383037] [2024-06-04 15:37:42,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087383037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:42,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:42,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:37:42,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012784044] [2024-06-04 15:37:42,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:42,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:37:42,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:42,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:37:42,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:37:42,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:37:42,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 422 transitions, 5604 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:42,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:42,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:37:42,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:43,806 INFO L124 PetriNetUnfolderBase]: 2749/4282 cut-off events. [2024-06-04 15:37:43,806 INFO L125 PetriNetUnfolderBase]: For 218395/218397 co-relation queries the response was YES. [2024-06-04 15:37:43,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31561 conditions, 4282 events. 2749/4282 cut-off events. For 218395/218397 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 23563 event pairs, 607 based on Foata normal form. 2/4282 useless extension candidates. Maximal degree in co-relation 31421. Up to 4159 conditions per place. [2024-06-04 15:37:43,858 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 414 selfloop transitions, 17 changer transitions 0/435 dead transitions. [2024-06-04 15:37:43,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 435 transitions, 6524 flow [2024-06-04 15:37:43,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:37:43,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:37:43,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-04 15:37:43,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-06-04 15:37:43,859 INFO L175 Difference]: Start difference. First operand has 300 places, 422 transitions, 5604 flow. Second operand 7 states and 114 transitions. [2024-06-04 15:37:43,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 435 transitions, 6524 flow [2024-06-04 15:37:44,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 435 transitions, 6450 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-04 15:37:44,530 INFO L231 Difference]: Finished difference. Result has 303 places, 424 transitions, 5603 flow [2024-06-04 15:37:44,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5530, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5603, PETRI_PLACES=303, PETRI_TRANSITIONS=424} [2024-06-04 15:37:44,531 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 261 predicate places. [2024-06-04 15:37:44,531 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 424 transitions, 5603 flow [2024-06-04 15:37:44,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:44,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:44,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:44,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-04 15:37:44,531 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:37:44,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:44,532 INFO L85 PathProgramCache]: Analyzing trace with hash -2062164425, now seen corresponding path program 3 times [2024-06-04 15:37:44,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:44,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429930480] [2024-06-04 15:37:44,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:44,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:44,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:45,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:45,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:45,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429930480] [2024-06-04 15:37:45,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429930480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:45,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:45,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:37:45,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596131177] [2024-06-04 15:37:45,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:45,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:37:45,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:45,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:37:45,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:37:45,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:37:45,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 424 transitions, 5603 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:45,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:45,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:37:45,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:46,301 INFO L124 PetriNetUnfolderBase]: 2757/4294 cut-off events. [2024-06-04 15:37:46,302 INFO L125 PetriNetUnfolderBase]: For 225737/225739 co-relation queries the response was YES. [2024-06-04 15:37:46,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31840 conditions, 4294 events. 2757/4294 cut-off events. For 225737/225739 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 23689 event pairs, 613 based on Foata normal form. 2/4294 useless extension candidates. Maximal degree in co-relation 31698. Up to 4176 conditions per place. [2024-06-04 15:37:46,353 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 417 selfloop transitions, 16 changer transitions 0/437 dead transitions. [2024-06-04 15:37:46,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 437 transitions, 6537 flow [2024-06-04 15:37:46,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:37:46,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:37:46,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-04 15:37:46,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-06-04 15:37:46,355 INFO L175 Difference]: Start difference. First operand has 303 places, 424 transitions, 5603 flow. Second operand 7 states and 114 transitions. [2024-06-04 15:37:46,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 437 transitions, 6537 flow [2024-06-04 15:37:47,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 437 transitions, 6480 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-04 15:37:47,099 INFO L231 Difference]: Finished difference. Result has 305 places, 426 transitions, 5621 flow [2024-06-04 15:37:47,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5546, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5621, PETRI_PLACES=305, PETRI_TRANSITIONS=426} [2024-06-04 15:37:47,099 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 263 predicate places. [2024-06-04 15:37:47,100 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 426 transitions, 5621 flow [2024-06-04 15:37:47,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:47,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:47,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:47,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-04 15:37:47,100 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:37:47,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:47,101 INFO L85 PathProgramCache]: Analyzing trace with hash 2004717023, now seen corresponding path program 5 times [2024-06-04 15:37:47,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:47,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543417] [2024-06-04 15:37:47,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:47,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:47,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:48,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:48,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:48,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543417] [2024-06-04 15:37:48,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:48,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:48,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:37:48,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830879281] [2024-06-04 15:37:48,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:48,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:37:48,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:48,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:37:48,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:37:48,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-04 15:37:48,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 426 transitions, 5621 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:48,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:48,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-04 15:37:48,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:49,107 INFO L124 PetriNetUnfolderBase]: 2701/4241 cut-off events. [2024-06-04 15:37:49,107 INFO L125 PetriNetUnfolderBase]: For 245353/245392 co-relation queries the response was YES. [2024-06-04 15:37:49,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31231 conditions, 4241 events. 2701/4241 cut-off events. For 245353/245392 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 23635 event pairs, 478 based on Foata normal form. 20/4237 useless extension candidates. Maximal degree in co-relation 31088. Up to 3545 conditions per place. [2024-06-04 15:37:49,160 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 334 selfloop transitions, 83 changer transitions 0/458 dead transitions. [2024-06-04 15:37:49,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 458 transitions, 6624 flow [2024-06-04 15:37:49,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:37:49,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:37:49,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-04 15:37:49,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-04 15:37:49,162 INFO L175 Difference]: Start difference. First operand has 305 places, 426 transitions, 5621 flow. Second operand 8 states and 156 transitions. [2024-06-04 15:37:49,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 458 transitions, 6624 flow [2024-06-04 15:37:50,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 458 transitions, 6535 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-04 15:37:50,051 INFO L231 Difference]: Finished difference. Result has 308 places, 427 transitions, 5741 flow [2024-06-04 15:37:50,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5532, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5741, PETRI_PLACES=308, PETRI_TRANSITIONS=427} [2024-06-04 15:37:50,052 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 266 predicate places. [2024-06-04 15:37:50,052 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 427 transitions, 5741 flow [2024-06-04 15:37:50,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:50,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:50,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:50,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-04 15:37:50,053 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:37:50,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:50,053 INFO L85 PathProgramCache]: Analyzing trace with hash -2062171369, now seen corresponding path program 7 times [2024-06-04 15:37:50,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:50,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796048026] [2024-06-04 15:37:50,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:50,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:50,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:50,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:50,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:50,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796048026] [2024-06-04 15:37:50,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796048026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:50,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:50,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:37:50,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151988852] [2024-06-04 15:37:50,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:50,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:37:50,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:50,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:37:50,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:37:51,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:37:51,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 427 transitions, 5741 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:51,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:51,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:37:51,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:52,151 INFO L124 PetriNetUnfolderBase]: 2793/4350 cut-off events. [2024-06-04 15:37:52,151 INFO L125 PetriNetUnfolderBase]: For 234966/234968 co-relation queries the response was YES. [2024-06-04 15:37:52,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32560 conditions, 4350 events. 2793/4350 cut-off events. For 234966/234968 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 24040 event pairs, 619 based on Foata normal form. 2/4350 useless extension candidates. Maximal degree in co-relation 32416. Up to 4222 conditions per place. [2024-06-04 15:37:52,201 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 419 selfloop transitions, 20 changer transitions 0/443 dead transitions. [2024-06-04 15:37:52,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 443 transitions, 6731 flow [2024-06-04 15:37:52,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:37:52,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:37:52,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-04 15:37:52,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-04 15:37:52,203 INFO L175 Difference]: Start difference. First operand has 308 places, 427 transitions, 5741 flow. Second operand 8 states and 129 transitions. [2024-06-04 15:37:52,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 443 transitions, 6731 flow [2024-06-04 15:37:53,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 443 transitions, 6562 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-04 15:37:53,032 INFO L231 Difference]: Finished difference. Result has 310 places, 430 transitions, 5686 flow [2024-06-04 15:37:53,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5572, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5686, PETRI_PLACES=310, PETRI_TRANSITIONS=430} [2024-06-04 15:37:53,033 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 268 predicate places. [2024-06-04 15:37:53,033 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 430 transitions, 5686 flow [2024-06-04 15:37:53,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:53,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:53,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:53,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-04 15:37:53,033 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:37:53,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:53,034 INFO L85 PathProgramCache]: Analyzing trace with hash -2053890463, now seen corresponding path program 1 times [2024-06-04 15:37:53,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:53,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248139679] [2024-06-04 15:37:53,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:53,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:53,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:53,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:53,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:53,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248139679] [2024-06-04 15:37:53,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248139679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:53,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:53,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:37:53,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115991949] [2024-06-04 15:37:53,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:53,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:37:53,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:53,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:37:53,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:37:53,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:37:53,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 430 transitions, 5686 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:53,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:53,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:37:53,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:54,936 INFO L124 PetriNetUnfolderBase]: 2790/4346 cut-off events. [2024-06-04 15:37:54,937 INFO L125 PetriNetUnfolderBase]: For 237219/237221 co-relation queries the response was YES. [2024-06-04 15:37:54,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32283 conditions, 4346 events. 2790/4346 cut-off events. For 237219/237221 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 24004 event pairs, 618 based on Foata normal form. 1/4345 useless extension candidates. Maximal degree in co-relation 32138. Up to 4217 conditions per place. [2024-06-04 15:37:54,989 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 412 selfloop transitions, 25 changer transitions 0/441 dead transitions. [2024-06-04 15:37:54,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 441 transitions, 6600 flow [2024-06-04 15:37:54,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:37:54,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:37:54,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-04 15:37:54,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40418118466898956 [2024-06-04 15:37:54,990 INFO L175 Difference]: Start difference. First operand has 310 places, 430 transitions, 5686 flow. Second operand 7 states and 116 transitions. [2024-06-04 15:37:54,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 441 transitions, 6600 flow [2024-06-04 15:37:55,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 441 transitions, 6518 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-04 15:37:55,851 INFO L231 Difference]: Finished difference. Result has 312 places, 430 transitions, 5664 flow [2024-06-04 15:37:55,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5604, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5664, PETRI_PLACES=312, PETRI_TRANSITIONS=430} [2024-06-04 15:37:55,852 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 270 predicate places. [2024-06-04 15:37:55,853 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 430 transitions, 5664 flow [2024-06-04 15:37:55,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:55,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:55,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:55,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-04 15:37:55,853 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:37:55,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:55,854 INFO L85 PathProgramCache]: Analyzing trace with hash 505666749, now seen corresponding path program 4 times [2024-06-04 15:37:55,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:55,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75886396] [2024-06-04 15:37:55,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:55,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:55,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:56,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:56,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:56,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75886396] [2024-06-04 15:37:56,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75886396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:56,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:56,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:37:56,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713711690] [2024-06-04 15:37:56,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:56,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:37:56,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:56,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:37:56,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:37:56,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:37:56,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 430 transitions, 5664 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:56,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:56,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:37:56,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:57,681 INFO L124 PetriNetUnfolderBase]: 2798/4358 cut-off events. [2024-06-04 15:37:57,682 INFO L125 PetriNetUnfolderBase]: For 246099/246101 co-relation queries the response was YES. [2024-06-04 15:37:57,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32447 conditions, 4358 events. 2798/4358 cut-off events. For 246099/246101 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 24065 event pairs, 600 based on Foata normal form. 2/4358 useless extension candidates. Maximal degree in co-relation 32301. Up to 4207 conditions per place. [2024-06-04 15:37:57,735 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 413 selfloop transitions, 30 changer transitions 0/447 dead transitions. [2024-06-04 15:37:57,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 447 transitions, 6640 flow [2024-06-04 15:37:57,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:37:57,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:37:57,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-04 15:37:57,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42160278745644597 [2024-06-04 15:37:57,736 INFO L175 Difference]: Start difference. First operand has 312 places, 430 transitions, 5664 flow. Second operand 7 states and 121 transitions. [2024-06-04 15:37:57,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 447 transitions, 6640 flow [2024-06-04 15:37:58,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 447 transitions, 6557 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-04 15:37:58,493 INFO L231 Difference]: Finished difference. Result has 313 places, 432 transitions, 5691 flow [2024-06-04 15:37:58,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5581, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5691, PETRI_PLACES=313, PETRI_TRANSITIONS=432} [2024-06-04 15:37:58,494 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 271 predicate places. [2024-06-04 15:37:58,494 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 432 transitions, 5691 flow [2024-06-04 15:37:58,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:58,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:58,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:58,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-04 15:37:58,495 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:37:58,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:58,495 INFO L85 PathProgramCache]: Analyzing trace with hash -2053890215, now seen corresponding path program 5 times [2024-06-04 15:37:58,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:58,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750312561] [2024-06-04 15:37:58,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:58,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:58,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:59,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:59,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:59,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750312561] [2024-06-04 15:37:59,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750312561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:59,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:59,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:37:59,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832082335] [2024-06-04 15:37:59,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:59,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:37:59,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:59,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:37:59,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:37:59,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:37:59,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 432 transitions, 5691 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:59,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:59,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:37:59,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:00,293 INFO L124 PetriNetUnfolderBase]: 2793/4351 cut-off events. [2024-06-04 15:38:00,294 INFO L125 PetriNetUnfolderBase]: For 250441/250443 co-relation queries the response was YES. [2024-06-04 15:38:00,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32535 conditions, 4351 events. 2793/4351 cut-off events. For 250441/250443 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 24086 event pairs, 617 based on Foata normal form. 2/4351 useless extension candidates. Maximal degree in co-relation 32388. Up to 4221 conditions per place. [2024-06-04 15:38:00,353 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 418 selfloop transitions, 23 changer transitions 0/445 dead transitions. [2024-06-04 15:38:00,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 445 transitions, 6649 flow [2024-06-04 15:38:00,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:38:00,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:38:00,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-04 15:38:00,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40069686411149824 [2024-06-04 15:38:00,354 INFO L175 Difference]: Start difference. First operand has 313 places, 432 transitions, 5691 flow. Second operand 7 states and 115 transitions. [2024-06-04 15:38:00,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 445 transitions, 6649 flow [2024-06-04 15:38:01,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 445 transitions, 6555 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-04 15:38:01,209 INFO L231 Difference]: Finished difference. Result has 315 places, 434 transitions, 5697 flow [2024-06-04 15:38:01,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5601, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5697, PETRI_PLACES=315, PETRI_TRANSITIONS=434} [2024-06-04 15:38:01,209 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 273 predicate places. [2024-06-04 15:38:01,210 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 434 transitions, 5697 flow [2024-06-04 15:38:01,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:01,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:01,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:38:01,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-04 15:38:01,210 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:38:01,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:01,211 INFO L85 PathProgramCache]: Analyzing trace with hash 2004894777, now seen corresponding path program 8 times [2024-06-04 15:38:01,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:01,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354869704] [2024-06-04 15:38:01,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:01,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:01,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:02,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:38:02,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:02,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354869704] [2024-06-04 15:38:02,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354869704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:02,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:02,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:38:02,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87337532] [2024-06-04 15:38:02,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:02,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:38:02,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:02,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:38:02,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:38:02,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:38:02,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 434 transitions, 5697 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:02,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:02,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:38:02,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:03,058 INFO L124 PetriNetUnfolderBase]: 2787/4343 cut-off events. [2024-06-04 15:38:03,058 INFO L125 PetriNetUnfolderBase]: For 246119/246121 co-relation queries the response was YES. [2024-06-04 15:38:03,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32259 conditions, 4343 events. 2787/4343 cut-off events. For 246119/246121 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 24041 event pairs, 610 based on Foata normal form. 2/4343 useless extension candidates. Maximal degree in co-relation 32111. Up to 4162 conditions per place. [2024-06-04 15:38:03,113 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 406 selfloop transitions, 42 changer transitions 0/452 dead transitions. [2024-06-04 15:38:03,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 452 transitions, 6679 flow [2024-06-04 15:38:03,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:38:03,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:38:03,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-04 15:38:03,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-04 15:38:03,115 INFO L175 Difference]: Start difference. First operand has 315 places, 434 transitions, 5697 flow. Second operand 8 states and 139 transitions. [2024-06-04 15:38:03,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 452 transitions, 6679 flow [2024-06-04 15:38:03,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 452 transitions, 6563 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-04 15:38:03,939 INFO L231 Difference]: Finished difference. Result has 318 places, 435 transitions, 5691 flow [2024-06-04 15:38:03,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5589, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5691, PETRI_PLACES=318, PETRI_TRANSITIONS=435} [2024-06-04 15:38:03,939 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-04 15:38:03,940 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 435 transitions, 5691 flow [2024-06-04 15:38:03,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:03,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:03,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:38:03,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-04 15:38:03,940 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:38:03,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:03,941 INFO L85 PathProgramCache]: Analyzing trace with hash -580275227, now seen corresponding path program 1 times [2024-06-04 15:38:03,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:03,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90646273] [2024-06-04 15:38:03,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:03,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:03,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:04,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:38:04,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:04,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90646273] [2024-06-04 15:38:04,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90646273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:04,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:04,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:38:04,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046363019] [2024-06-04 15:38:04,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:04,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:38:04,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:04,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:38:04,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:38:04,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:38:04,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 435 transitions, 5691 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:04,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:04,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:38:04,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:05,877 INFO L124 PetriNetUnfolderBase]: 2813/4381 cut-off events. [2024-06-04 15:38:05,877 INFO L125 PetriNetUnfolderBase]: For 249546/249548 co-relation queries the response was YES. [2024-06-04 15:38:05,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32531 conditions, 4381 events. 2813/4381 cut-off events. For 249546/249548 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 24229 event pairs, 514 based on Foata normal form. 2/4374 useless extension candidates. Maximal degree in co-relation 32382. Up to 3988 conditions per place. [2024-06-04 15:38:05,937 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 365 selfloop transitions, 96 changer transitions 0/465 dead transitions. [2024-06-04 15:38:05,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 465 transitions, 6996 flow [2024-06-04 15:38:05,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:38:05,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:38:05,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-04 15:38:05,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-04 15:38:05,939 INFO L175 Difference]: Start difference. First operand has 318 places, 435 transitions, 5691 flow. Second operand 8 states and 144 transitions. [2024-06-04 15:38:05,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 465 transitions, 6996 flow [2024-06-04 15:38:06,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 465 transitions, 6904 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-04 15:38:06,827 INFO L231 Difference]: Finished difference. Result has 321 places, 444 transitions, 5972 flow [2024-06-04 15:38:06,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5599, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5972, PETRI_PLACES=321, PETRI_TRANSITIONS=444} [2024-06-04 15:38:06,830 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 279 predicate places. [2024-06-04 15:38:06,831 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 444 transitions, 5972 flow [2024-06-04 15:38:06,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:06,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:06,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:38:06,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-04 15:38:06,831 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:38:06,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:06,832 INFO L85 PathProgramCache]: Analyzing trace with hash 972540257, now seen corresponding path program 2 times [2024-06-04 15:38:06,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:06,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54597224] [2024-06-04 15:38:06,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:06,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:06,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:07,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:38:07,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:07,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54597224] [2024-06-04 15:38:07,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54597224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:07,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:07,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:38:07,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157917468] [2024-06-04 15:38:07,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:07,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:38:07,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:07,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:38:07,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:38:07,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:38:07,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 444 transitions, 5972 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:07,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:07,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:38:07,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:08,788 INFO L124 PetriNetUnfolderBase]: 2823/4391 cut-off events. [2024-06-04 15:38:08,788 INFO L125 PetriNetUnfolderBase]: For 260469/260471 co-relation queries the response was YES. [2024-06-04 15:38:08,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33433 conditions, 4391 events. 2823/4391 cut-off events. For 260469/260471 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 24207 event pairs, 532 based on Foata normal form. 2/4384 useless extension candidates. Maximal degree in co-relation 33282. Up to 4163 conditions per place. [2024-06-04 15:38:08,839 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 407 selfloop transitions, 46 changer transitions 0/457 dead transitions. [2024-06-04 15:38:08,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 457 transitions, 6994 flow [2024-06-04 15:38:08,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:38:08,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:38:08,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-04 15:38:08,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4349593495934959 [2024-06-04 15:38:08,840 INFO L175 Difference]: Start difference. First operand has 321 places, 444 transitions, 5972 flow. Second operand 6 states and 107 transitions. [2024-06-04 15:38:08,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 457 transitions, 6994 flow [2024-06-04 15:38:09,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 457 transitions, 6897 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-04 15:38:09,805 INFO L231 Difference]: Finished difference. Result has 324 places, 447 transitions, 6051 flow [2024-06-04 15:38:09,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5875, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6051, PETRI_PLACES=324, PETRI_TRANSITIONS=447} [2024-06-04 15:38:09,806 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 282 predicate places. [2024-06-04 15:38:09,806 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 447 transitions, 6051 flow [2024-06-04 15:38:09,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:09,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:09,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:38:09,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-04 15:38:09,807 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:38:09,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:09,807 INFO L85 PathProgramCache]: Analyzing trace with hash 972303107, now seen corresponding path program 3 times [2024-06-04 15:38:09,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:09,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990461058] [2024-06-04 15:38:09,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:09,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:09,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:10,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:38:10,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:10,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990461058] [2024-06-04 15:38:10,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990461058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:10,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:10,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:38:10,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088851075] [2024-06-04 15:38:10,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:10,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:38:10,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:10,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:38:10,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:38:10,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:38:10,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 447 transitions, 6051 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:10,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:10,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:38:10,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:11,921 INFO L124 PetriNetUnfolderBase]: 2817/4385 cut-off events. [2024-06-04 15:38:11,921 INFO L125 PetriNetUnfolderBase]: For 263679/263681 co-relation queries the response was YES. [2024-06-04 15:38:11,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33455 conditions, 4385 events. 2817/4385 cut-off events. For 263679/263681 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 24158 event pairs, 513 based on Foata normal form. 2/4378 useless extension candidates. Maximal degree in co-relation 33302. Up to 3993 conditions per place. [2024-06-04 15:38:11,983 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 365 selfloop transitions, 96 changer transitions 0/465 dead transitions. [2024-06-04 15:38:11,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 465 transitions, 7084 flow [2024-06-04 15:38:11,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:38:11,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:38:11,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-04 15:38:11,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445993031358885 [2024-06-04 15:38:11,985 INFO L175 Difference]: Start difference. First operand has 324 places, 447 transitions, 6051 flow. Second operand 7 states and 128 transitions. [2024-06-04 15:38:11,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 465 transitions, 7084 flow [2024-06-04 15:38:12,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 465 transitions, 6932 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-04 15:38:12,872 INFO L231 Difference]: Finished difference. Result has 325 places, 447 transitions, 6119 flow [2024-06-04 15:38:12,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5899, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6119, PETRI_PLACES=325, PETRI_TRANSITIONS=447} [2024-06-04 15:38:12,873 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 283 predicate places. [2024-06-04 15:38:12,873 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 447 transitions, 6119 flow [2024-06-04 15:38:12,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:12,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:12,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:38:12,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-04 15:38:12,874 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:38:12,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:12,874 INFO L85 PathProgramCache]: Analyzing trace with hash 2033938259, now seen corresponding path program 1 times [2024-06-04 15:38:12,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:12,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729085368] [2024-06-04 15:38:12,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:12,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:12,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:13,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:38:13,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:13,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729085368] [2024-06-04 15:38:13,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729085368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:13,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:13,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:38:13,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715936440] [2024-06-04 15:38:13,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:13,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:38:13,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:13,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:38:13,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:38:13,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:38:13,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 447 transitions, 6119 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:13,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:13,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:38:13,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:14,807 INFO L124 PetriNetUnfolderBase]: 2814/4385 cut-off events. [2024-06-04 15:38:14,808 INFO L125 PetriNetUnfolderBase]: For 259490/259492 co-relation queries the response was YES. [2024-06-04 15:38:14,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33481 conditions, 4385 events. 2814/4385 cut-off events. For 259490/259492 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 24256 event pairs, 536 based on Foata normal form. 1/4377 useless extension candidates. Maximal degree in co-relation 33328. Up to 3979 conditions per place. [2024-06-04 15:38:14,863 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 361 selfloop transitions, 98 changer transitions 0/463 dead transitions. [2024-06-04 15:38:14,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 463 transitions, 7093 flow [2024-06-04 15:38:14,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:38:14,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:38:14,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-04 15:38:14,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-04 15:38:14,864 INFO L175 Difference]: Start difference. First operand has 325 places, 447 transitions, 6119 flow. Second operand 6 states and 114 transitions. [2024-06-04 15:38:14,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 463 transitions, 7093 flow [2024-06-04 15:38:15,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 463 transitions, 6908 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-04 15:38:15,910 INFO L231 Difference]: Finished difference. Result has 325 places, 447 transitions, 6177 flow [2024-06-04 15:38:15,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5934, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6177, PETRI_PLACES=325, PETRI_TRANSITIONS=447} [2024-06-04 15:38:15,911 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 283 predicate places. [2024-06-04 15:38:15,911 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 447 transitions, 6177 flow [2024-06-04 15:38:15,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:15,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:15,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:38:15,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-04 15:38:15,912 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:38:15,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:15,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1663960711, now seen corresponding path program 1 times [2024-06-04 15:38:15,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:15,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378787953] [2024-06-04 15:38:15,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:15,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:15,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:16,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:38:16,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:16,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378787953] [2024-06-04 15:38:16,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378787953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:16,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:16,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:38:16,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988552656] [2024-06-04 15:38:16,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:16,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:38:16,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:16,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:38:16,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:38:16,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:38:16,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 447 transitions, 6177 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:16,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:16,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:38:16,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:17,777 INFO L124 PetriNetUnfolderBase]: 2929/4553 cut-off events. [2024-06-04 15:38:17,777 INFO L125 PetriNetUnfolderBase]: For 268438/268447 co-relation queries the response was YES. [2024-06-04 15:38:17,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35046 conditions, 4553 events. 2929/4553 cut-off events. For 268438/268447 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 25245 event pairs, 499 based on Foata normal form. 10/4558 useless extension candidates. Maximal degree in co-relation 34894. Up to 4098 conditions per place. [2024-06-04 15:38:17,832 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 395 selfloop transitions, 108 changer transitions 0/507 dead transitions. [2024-06-04 15:38:17,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 507 transitions, 8010 flow [2024-06-04 15:38:17,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:38:17,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:38:17,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-04 15:38:17,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-04 15:38:17,834 INFO L175 Difference]: Start difference. First operand has 325 places, 447 transitions, 6177 flow. Second operand 9 states and 163 transitions. [2024-06-04 15:38:17,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 507 transitions, 8010 flow [2024-06-04 15:38:18,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 507 transitions, 7715 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-04 15:38:18,901 INFO L231 Difference]: Finished difference. Result has 330 places, 472 transitions, 6678 flow [2024-06-04 15:38:18,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5928, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6678, PETRI_PLACES=330, PETRI_TRANSITIONS=472} [2024-06-04 15:38:18,902 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 288 predicate places. [2024-06-04 15:38:18,902 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 472 transitions, 6678 flow [2024-06-04 15:38:18,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:18,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:18,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:38:18,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-04 15:38:18,903 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:38:18,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:18,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1669094597, now seen corresponding path program 2 times [2024-06-04 15:38:18,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:18,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956677176] [2024-06-04 15:38:18,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:18,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:18,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:19,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:38:19,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:19,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956677176] [2024-06-04 15:38:19,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956677176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:19,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:19,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:38:19,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302411064] [2024-06-04 15:38:19,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:19,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:38:19,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:19,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:38:19,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:38:19,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:38:19,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 472 transitions, 6678 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:19,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:19,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:38:19,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:21,038 INFO L124 PetriNetUnfolderBase]: 2981/4635 cut-off events. [2024-06-04 15:38:21,039 INFO L125 PetriNetUnfolderBase]: For 280790/280799 co-relation queries the response was YES. [2024-06-04 15:38:21,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36390 conditions, 4635 events. 2981/4635 cut-off events. For 280790/280799 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 25793 event pairs, 509 based on Foata normal form. 10/4640 useless extension candidates. Maximal degree in co-relation 36236. Up to 4282 conditions per place. [2024-06-04 15:38:21,093 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 426 selfloop transitions, 79 changer transitions 0/509 dead transitions. [2024-06-04 15:38:21,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 509 transitions, 8173 flow [2024-06-04 15:38:21,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:38:21,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:38:21,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-04 15:38:21,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-04 15:38:21,096 INFO L175 Difference]: Start difference. First operand has 330 places, 472 transitions, 6678 flow. Second operand 9 states and 161 transitions. [2024-06-04 15:38:21,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 509 transitions, 8173 flow [2024-06-04 15:38:22,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 509 transitions, 8010 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-04 15:38:22,112 INFO L231 Difference]: Finished difference. Result has 335 places, 480 transitions, 6866 flow [2024-06-04 15:38:22,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6537, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6866, PETRI_PLACES=335, PETRI_TRANSITIONS=480} [2024-06-04 15:38:22,113 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 293 predicate places. [2024-06-04 15:38:22,113 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 480 transitions, 6866 flow [2024-06-04 15:38:22,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:22,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:22,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:38:22,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-04 15:38:22,114 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:38:22,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:22,114 INFO L85 PathProgramCache]: Analyzing trace with hash 145163423, now seen corresponding path program 3 times [2024-06-04 15:38:22,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:22,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503859662] [2024-06-04 15:38:22,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:22,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:22,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:22,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:38:22,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:22,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503859662] [2024-06-04 15:38:22,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503859662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:22,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:22,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:38:22,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647840071] [2024-06-04 15:38:22,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:22,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:38:22,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:22,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:38:22,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:38:22,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:38:22,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 480 transitions, 6866 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:22,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:22,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:38:22,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:24,196 INFO L124 PetriNetUnfolderBase]: 2969/4619 cut-off events. [2024-06-04 15:38:24,197 INFO L125 PetriNetUnfolderBase]: For 272297/272306 co-relation queries the response was YES. [2024-06-04 15:38:24,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36131 conditions, 4619 events. 2969/4619 cut-off events. For 272297/272306 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 25686 event pairs, 509 based on Foata normal form. 10/4624 useless extension candidates. Maximal degree in co-relation 35975. Up to 4274 conditions per place. [2024-06-04 15:38:24,248 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 424 selfloop transitions, 82 changer transitions 0/510 dead transitions. [2024-06-04 15:38:24,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 510 transitions, 8088 flow [2024-06-04 15:38:24,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:38:24,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:38:24,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 188 transitions. [2024-06-04 15:38:24,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41685144124168516 [2024-06-04 15:38:24,250 INFO L175 Difference]: Start difference. First operand has 335 places, 480 transitions, 6866 flow. Second operand 11 states and 188 transitions. [2024-06-04 15:38:24,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 510 transitions, 8088 flow [2024-06-04 15:38:25,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 510 transitions, 7949 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-04 15:38:25,420 INFO L231 Difference]: Finished difference. Result has 340 places, 480 transitions, 6901 flow [2024-06-04 15:38:25,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6727, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6901, PETRI_PLACES=340, PETRI_TRANSITIONS=480} [2024-06-04 15:38:25,421 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 298 predicate places. [2024-06-04 15:38:25,421 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 480 transitions, 6901 flow [2024-06-04 15:38:25,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:25,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:25,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:38:25,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-04 15:38:25,422 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:38:25,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:25,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1951402515, now seen corresponding path program 4 times [2024-06-04 15:38:25,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:25,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945152777] [2024-06-04 15:38:25,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:25,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:25,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:26,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:38:26,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:26,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945152777] [2024-06-04 15:38:26,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945152777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:26,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:26,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:38:26,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999195879] [2024-06-04 15:38:26,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:26,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:38:26,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:26,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:38:26,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:38:26,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:38:26,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 480 transitions, 6901 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:26,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:26,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:38:26,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:27,353 INFO L124 PetriNetUnfolderBase]: 3021/4693 cut-off events. [2024-06-04 15:38:27,353 INFO L125 PetriNetUnfolderBase]: For 280658/280667 co-relation queries the response was YES. [2024-06-04 15:38:27,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37140 conditions, 4693 events. 3021/4693 cut-off events. For 280658/280667 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 26109 event pairs, 541 based on Foata normal form. 10/4698 useless extension candidates. Maximal degree in co-relation 36983. Up to 4299 conditions per place. [2024-06-04 15:38:27,419 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 432 selfloop transitions, 79 changer transitions 0/515 dead transitions. [2024-06-04 15:38:27,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 515 transitions, 8502 flow [2024-06-04 15:38:27,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:38:27,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:38:27,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-04 15:38:27,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-04 15:38:27,421 INFO L175 Difference]: Start difference. First operand has 340 places, 480 transitions, 6901 flow. Second operand 8 states and 146 transitions. [2024-06-04 15:38:27,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 515 transitions, 8502 flow [2024-06-04 15:38:28,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 515 transitions, 8335 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-04 15:38:28,466 INFO L231 Difference]: Finished difference. Result has 340 places, 488 transitions, 7101 flow [2024-06-04 15:38:28,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6738, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7101, PETRI_PLACES=340, PETRI_TRANSITIONS=488} [2024-06-04 15:38:28,468 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 298 predicate places. [2024-06-04 15:38:28,468 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 488 transitions, 7101 flow [2024-06-04 15:38:28,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:28,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:28,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:38:28,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-04 15:38:28,469 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:38:28,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:28,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1958754165, now seen corresponding path program 5 times [2024-06-04 15:38:28,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:28,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948853702] [2024-06-04 15:38:28,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:28,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:28,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:29,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:38:29,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:29,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948853702] [2024-06-04 15:38:29,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948853702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:29,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:29,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:38:29,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381590921] [2024-06-04 15:38:29,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:29,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:38:29,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:29,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:38:29,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:38:29,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:38:29,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 488 transitions, 7101 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:29,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:29,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:38:29,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:30,474 INFO L124 PetriNetUnfolderBase]: 3009/4662 cut-off events. [2024-06-04 15:38:30,474 INFO L125 PetriNetUnfolderBase]: For 273035/273044 co-relation queries the response was YES. [2024-06-04 15:38:30,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36887 conditions, 4662 events. 3009/4662 cut-off events. For 273035/273044 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 25837 event pairs, 535 based on Foata normal form. 10/4667 useless extension candidates. Maximal degree in co-relation 36729. Up to 4464 conditions per place. [2024-06-04 15:38:30,540 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 463 selfloop transitions, 36 changer transitions 0/503 dead transitions. [2024-06-04 15:38:30,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 503 transitions, 8200 flow [2024-06-04 15:38:30,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:38:30,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:38:30,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-04 15:38:30,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42160278745644597 [2024-06-04 15:38:30,543 INFO L175 Difference]: Start difference. First operand has 340 places, 488 transitions, 7101 flow. Second operand 7 states and 121 transitions. [2024-06-04 15:38:30,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 503 transitions, 8200 flow [2024-06-04 15:38:31,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 503 transitions, 8046 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-04 15:38:31,792 INFO L231 Difference]: Finished difference. Result has 342 places, 488 transitions, 7029 flow [2024-06-04 15:38:31,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6947, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7029, PETRI_PLACES=342, PETRI_TRANSITIONS=488} [2024-06-04 15:38:31,793 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 300 predicate places. [2024-06-04 15:38:31,793 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 488 transitions, 7029 flow [2024-06-04 15:38:31,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:31,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:31,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:38:31,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-04 15:38:31,794 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:38:31,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:31,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1959021292, now seen corresponding path program 1 times [2024-06-04 15:38:31,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:31,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591122806] [2024-06-04 15:38:31,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:31,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:31,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:32,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:38:32,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:32,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591122806] [2024-06-04 15:38:32,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591122806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:32,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:32,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:38:32,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959909300] [2024-06-04 15:38:32,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:32,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:38:32,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:32,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:38:32,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:38:32,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:38:32,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 488 transitions, 7029 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:32,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:32,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:38:32,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:33,713 INFO L124 PetriNetUnfolderBase]: 3019/4686 cut-off events. [2024-06-04 15:38:33,713 INFO L125 PetriNetUnfolderBase]: For 269880/269889 co-relation queries the response was YES. [2024-06-04 15:38:33,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36790 conditions, 4686 events. 3019/4686 cut-off events. For 269880/269889 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 26025 event pairs, 538 based on Foata normal form. 8/4689 useless extension candidates. Maximal degree in co-relation 36632. Up to 4491 conditions per place. [2024-06-04 15:38:33,777 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 462 selfloop transitions, 40 changer transitions 0/506 dead transitions. [2024-06-04 15:38:33,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 506 transitions, 8209 flow [2024-06-04 15:38:33,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:38:33,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:38:33,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-04 15:38:33,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-04 15:38:33,779 INFO L175 Difference]: Start difference. First operand has 342 places, 488 transitions, 7029 flow. Second operand 6 states and 106 transitions. [2024-06-04 15:38:33,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 506 transitions, 8209 flow [2024-06-04 15:38:34,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 506 transitions, 8125 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-04 15:38:34,826 INFO L231 Difference]: Finished difference. Result has 344 places, 494 transitions, 7175 flow [2024-06-04 15:38:34,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6945, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7175, PETRI_PLACES=344, PETRI_TRANSITIONS=494} [2024-06-04 15:38:34,827 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 302 predicate places. [2024-06-04 15:38:34,827 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 494 transitions, 7175 flow [2024-06-04 15:38:34,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:34,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:34,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:38:34,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-04 15:38:34,828 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:38:34,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:34,828 INFO L85 PathProgramCache]: Analyzing trace with hash 144905883, now seen corresponding path program 6 times [2024-06-04 15:38:34,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:34,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417359878] [2024-06-04 15:38:34,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:34,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:34,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:35,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:38:35,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:35,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417359878] [2024-06-04 15:38:35,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417359878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:35,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:35,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:38:35,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003332110] [2024-06-04 15:38:35,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:35,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:38:35,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:35,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:38:35,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:38:35,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:38:35,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 494 transitions, 7175 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:35,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:35,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:38:35,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:36,611 INFO L124 PetriNetUnfolderBase]: 3007/4669 cut-off events. [2024-06-04 15:38:36,611 INFO L125 PetriNetUnfolderBase]: For 274713/274722 co-relation queries the response was YES. [2024-06-04 15:38:36,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36942 conditions, 4669 events. 3007/4669 cut-off events. For 274713/274722 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 25970 event pairs, 518 based on Foata normal form. 10/4674 useless extension candidates. Maximal degree in co-relation 36782. Up to 4297 conditions per place. [2024-06-04 15:38:36,676 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 434 selfloop transitions, 84 changer transitions 0/522 dead transitions. [2024-06-04 15:38:36,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 522 transitions, 8405 flow [2024-06-04 15:38:36,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:38:36,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:38:36,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-04 15:38:36,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-04 15:38:36,677 INFO L175 Difference]: Start difference. First operand has 344 places, 494 transitions, 7175 flow. Second operand 8 states and 147 transitions. [2024-06-04 15:38:36,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 522 transitions, 8405 flow [2024-06-04 15:38:37,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 522 transitions, 8284 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-04 15:38:37,760 INFO L231 Difference]: Finished difference. Result has 349 places, 494 transitions, 7233 flow [2024-06-04 15:38:37,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7054, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7233, PETRI_PLACES=349, PETRI_TRANSITIONS=494} [2024-06-04 15:38:37,761 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 307 predicate places. [2024-06-04 15:38:37,761 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 494 transitions, 7233 flow [2024-06-04 15:38:37,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:37,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:37,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:38:37,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-04 15:38:37,762 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:38:37,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:37,762 INFO L85 PathProgramCache]: Analyzing trace with hash -2004264701, now seen corresponding path program 1 times [2024-06-04 15:38:37,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:37,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424385772] [2024-06-04 15:38:37,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:37,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:37,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:38,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:38:38,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:38,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424385772] [2024-06-04 15:38:38,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424385772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:38,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:38,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:38:38,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710151445] [2024-06-04 15:38:38,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:38,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:38:38,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:38,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:38:38,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:38:38,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:38:38,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 494 transitions, 7233 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:38,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:38,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:38:38,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:39,903 INFO L124 PetriNetUnfolderBase]: 3051/4728 cut-off events. [2024-06-04 15:38:39,904 INFO L125 PetriNetUnfolderBase]: For 290830/290832 co-relation queries the response was YES. [2024-06-04 15:38:39,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37504 conditions, 4728 events. 3051/4728 cut-off events. For 290830/290832 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 26225 event pairs, 430 based on Foata normal form. 8/4727 useless extension candidates. Maximal degree in co-relation 37343. Up to 4266 conditions per place. [2024-06-04 15:38:39,971 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 464 selfloop transitions, 56 changer transitions 0/524 dead transitions. [2024-06-04 15:38:39,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 524 transitions, 8615 flow [2024-06-04 15:38:39,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:38:39,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:38:39,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-04 15:38:39,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-04 15:38:39,973 INFO L175 Difference]: Start difference. First operand has 349 places, 494 transitions, 7233 flow. Second operand 8 states and 144 transitions. [2024-06-04 15:38:39,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 524 transitions, 8615 flow [2024-06-04 15:38:41,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 524 transitions, 8360 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-04 15:38:41,303 INFO L231 Difference]: Finished difference. Result has 350 places, 499 transitions, 7156 flow [2024-06-04 15:38:41,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6980, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7156, PETRI_PLACES=350, PETRI_TRANSITIONS=499} [2024-06-04 15:38:41,304 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 308 predicate places. [2024-06-04 15:38:41,304 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 499 transitions, 7156 flow [2024-06-04 15:38:41,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:41,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:41,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:38:41,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-04 15:38:41,304 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:38:41,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:41,305 INFO L85 PathProgramCache]: Analyzing trace with hash -855053117, now seen corresponding path program 2 times [2024-06-04 15:38:41,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:41,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748448954] [2024-06-04 15:38:41,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:41,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:41,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:42,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:38:42,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:42,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748448954] [2024-06-04 15:38:42,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748448954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:42,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:42,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:38:42,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544795335] [2024-06-04 15:38:42,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:42,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:38:42,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:42,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:38:42,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:38:42,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:38:42,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 499 transitions, 7156 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:42,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:42,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:38:42,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:43,488 INFO L124 PetriNetUnfolderBase]: 3033/4702 cut-off events. [2024-06-04 15:38:43,488 INFO L125 PetriNetUnfolderBase]: For 273902/273904 co-relation queries the response was YES. [2024-06-04 15:38:43,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36590 conditions, 4702 events. 3033/4702 cut-off events. For 273902/273904 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 26063 event pairs, 414 based on Foata normal form. 8/4701 useless extension candidates. Maximal degree in co-relation 36429. Up to 4258 conditions per place. [2024-06-04 15:38:43,547 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 460 selfloop transitions, 57 changer transitions 0/521 dead transitions. [2024-06-04 15:38:43,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 521 transitions, 8346 flow [2024-06-04 15:38:43,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:38:43,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:38:43,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-04 15:38:43,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-04 15:38:43,549 INFO L175 Difference]: Start difference. First operand has 350 places, 499 transitions, 7156 flow. Second operand 7 states and 130 transitions. [2024-06-04 15:38:43,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 521 transitions, 8346 flow [2024-06-04 15:38:44,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 521 transitions, 8250 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-04 15:38:44,682 INFO L231 Difference]: Finished difference. Result has 353 places, 499 transitions, 7182 flow [2024-06-04 15:38:44,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7060, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7182, PETRI_PLACES=353, PETRI_TRANSITIONS=499} [2024-06-04 15:38:44,683 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 311 predicate places. [2024-06-04 15:38:44,683 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 499 transitions, 7182 flow [2024-06-04 15:38:44,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:44,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:44,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:38:44,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-04 15:38:44,684 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:38:44,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:44,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1838841863, now seen corresponding path program 7 times [2024-06-04 15:38:44,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:44,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626373233] [2024-06-04 15:38:44,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:44,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:44,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:45,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:38:45,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:45,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626373233] [2024-06-04 15:38:45,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626373233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:45,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:45,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:38:45,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839522012] [2024-06-04 15:38:45,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:45,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:38:45,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:45,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:38:45,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:38:45,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:38:45,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 499 transitions, 7182 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:45,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:45,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:38:45,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:46,743 INFO L124 PetriNetUnfolderBase]: 3169/4908 cut-off events. [2024-06-04 15:38:46,743 INFO L125 PetriNetUnfolderBase]: For 294646/294655 co-relation queries the response was YES. [2024-06-04 15:38:46,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38886 conditions, 4908 events. 3169/4908 cut-off events. For 294646/294655 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 27422 event pairs, 542 based on Foata normal form. 10/4913 useless extension candidates. Maximal degree in co-relation 38724. Up to 4339 conditions per place. [2024-06-04 15:38:46,816 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 427 selfloop transitions, 136 changer transitions 0/567 dead transitions. [2024-06-04 15:38:46,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 567 transitions, 9318 flow [2024-06-04 15:38:46,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:38:46,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:38:46,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 194 transitions. [2024-06-04 15:38:46,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43015521064301554 [2024-06-04 15:38:46,817 INFO L175 Difference]: Start difference. First operand has 353 places, 499 transitions, 7182 flow. Second operand 11 states and 194 transitions. [2024-06-04 15:38:46,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 567 transitions, 9318 flow [2024-06-04 15:38:48,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 567 transitions, 9156 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-04 15:38:48,076 INFO L231 Difference]: Finished difference. Result has 358 places, 528 transitions, 7846 flow [2024-06-04 15:38:48,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7024, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7846, PETRI_PLACES=358, PETRI_TRANSITIONS=528} [2024-06-04 15:38:48,077 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 316 predicate places. [2024-06-04 15:38:48,077 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 528 transitions, 7846 flow [2024-06-04 15:38:48,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:48,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:48,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:38:48,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-04 15:38:48,078 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:38:48,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:48,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1842566513, now seen corresponding path program 8 times [2024-06-04 15:38:48,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:48,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520259826] [2024-06-04 15:38:48,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:48,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:48,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:48,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:38:48,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:48,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520259826] [2024-06-04 15:38:48,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520259826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:48,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:48,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:38:48,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235147617] [2024-06-04 15:38:48,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:48,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:38:48,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:48,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:38:48,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:38:49,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:38:49,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 528 transitions, 7846 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:49,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:49,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:38:49,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:50,311 INFO L124 PetriNetUnfolderBase]: 3231/5000 cut-off events. [2024-06-04 15:38:50,311 INFO L125 PetriNetUnfolderBase]: For 308618/308627 co-relation queries the response was YES. [2024-06-04 15:38:50,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40269 conditions, 5000 events. 3231/5000 cut-off events. For 308618/308627 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 28002 event pairs, 554 based on Foata normal form. 10/5005 useless extension candidates. Maximal degree in co-relation 40107. Up to 4641 conditions per place. [2024-06-04 15:38:50,389 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 492 selfloop transitions, 78 changer transitions 0/574 dead transitions. [2024-06-04 15:38:50,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 574 transitions, 9573 flow [2024-06-04 15:38:50,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 15:38:50,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 15:38:50,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 201 transitions. [2024-06-04 15:38:50,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-04 15:38:50,391 INFO L175 Difference]: Start difference. First operand has 358 places, 528 transitions, 7846 flow. Second operand 12 states and 201 transitions. [2024-06-04 15:38:50,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 574 transitions, 9573 flow [2024-06-04 15:38:51,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 574 transitions, 9227 flow, removed 125 selfloop flow, removed 5 redundant places. [2024-06-04 15:38:51,716 INFO L231 Difference]: Finished difference. Result has 366 places, 539 transitions, 7908 flow [2024-06-04 15:38:51,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7570, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7908, PETRI_PLACES=366, PETRI_TRANSITIONS=539} [2024-06-04 15:38:51,717 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 324 predicate places. [2024-06-04 15:38:51,717 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 539 transitions, 7908 flow [2024-06-04 15:38:51,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:51,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:51,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:38:51,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-04 15:38:51,718 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:38:51,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:51,718 INFO L85 PathProgramCache]: Analyzing trace with hash -809074113, now seen corresponding path program 9 times [2024-06-04 15:38:51,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:51,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552962199] [2024-06-04 15:38:51,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:51,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:51,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:52,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:38:52,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:52,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552962199] [2024-06-04 15:38:52,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552962199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:52,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:52,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:38:52,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155112875] [2024-06-04 15:38:52,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:52,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:38:52,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:52,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:38:52,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:38:52,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:38:52,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 539 transitions, 7908 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:52,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:52,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:38:52,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:53,837 INFO L124 PetriNetUnfolderBase]: 3261/5040 cut-off events. [2024-06-04 15:38:53,838 INFO L125 PetriNetUnfolderBase]: For 314012/314021 co-relation queries the response was YES. [2024-06-04 15:38:53,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40143 conditions, 5040 events. 3261/5040 cut-off events. For 314012/314021 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 28227 event pairs, 556 based on Foata normal form. 10/5045 useless extension candidates. Maximal degree in co-relation 39981. Up to 4559 conditions per place. [2024-06-04 15:38:53,912 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 434 selfloop transitions, 140 changer transitions 0/578 dead transitions. [2024-06-04 15:38:53,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 578 transitions, 9468 flow [2024-06-04 15:38:53,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:38:53,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:38:53,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-04 15:38:53,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292682926829268 [2024-06-04 15:38:53,914 INFO L175 Difference]: Start difference. First operand has 366 places, 539 transitions, 7908 flow. Second operand 10 states and 176 transitions. [2024-06-04 15:38:53,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 578 transitions, 9468 flow [2024-06-04 15:38:55,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 578 transitions, 9347 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-04 15:38:55,095 INFO L231 Difference]: Finished difference. Result has 368 places, 547 transitions, 8186 flow [2024-06-04 15:38:55,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7789, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8186, PETRI_PLACES=368, PETRI_TRANSITIONS=547} [2024-06-04 15:38:55,095 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 326 predicate places. [2024-06-04 15:38:55,096 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 547 transitions, 8186 flow [2024-06-04 15:38:55,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:55,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:55,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:38:55,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-04 15:38:55,096 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:38:55,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:55,097 INFO L85 PathProgramCache]: Analyzing trace with hash 668105961, now seen corresponding path program 10 times [2024-06-04 15:38:55,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:55,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498220668] [2024-06-04 15:38:55,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:55,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:55,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:55,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:38:55,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:55,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498220668] [2024-06-04 15:38:55,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498220668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:55,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:55,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:38:55,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592321167] [2024-06-04 15:38:55,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:55,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:38:55,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:55,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:38:55,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:38:55,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:38:55,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 547 transitions, 8186 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:55,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:55,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:38:55,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:57,238 INFO L124 PetriNetUnfolderBase]: 3281/5072 cut-off events. [2024-06-04 15:38:57,239 INFO L125 PetriNetUnfolderBase]: For 314763/314772 co-relation queries the response was YES. [2024-06-04 15:38:57,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40652 conditions, 5072 events. 3281/5072 cut-off events. For 314763/314772 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 28436 event pairs, 558 based on Foata normal form. 10/5077 useless extension candidates. Maximal degree in co-relation 40489. Up to 4619 conditions per place. [2024-06-04 15:38:57,313 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 427 selfloop transitions, 142 changer transitions 0/573 dead transitions. [2024-06-04 15:38:57,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 573 transitions, 9487 flow [2024-06-04 15:38:57,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:38:57,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:38:57,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-04 15:38:57,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-04 15:38:57,315 INFO L175 Difference]: Start difference. First operand has 368 places, 547 transitions, 8186 flow. Second operand 9 states and 157 transitions. [2024-06-04 15:38:57,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 573 transitions, 9487 flow [2024-06-04 15:38:58,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 573 transitions, 9080 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-04 15:38:58,657 INFO L231 Difference]: Finished difference. Result has 369 places, 550 transitions, 8128 flow [2024-06-04 15:38:58,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7789, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8128, PETRI_PLACES=369, PETRI_TRANSITIONS=550} [2024-06-04 15:38:58,658 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 327 predicate places. [2024-06-04 15:38:58,658 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 550 transitions, 8128 flow [2024-06-04 15:38:58,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:58,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:58,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:38:58,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-04 15:38:58,659 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:38:58,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:58,659 INFO L85 PathProgramCache]: Analyzing trace with hash 885678981, now seen corresponding path program 11 times [2024-06-04 15:38:58,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:58,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340498584] [2024-06-04 15:38:58,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:58,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:58,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:59,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:38:59,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:59,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340498584] [2024-06-04 15:38:59,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340498584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:59,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:59,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:38:59,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104272690] [2024-06-04 15:38:59,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:59,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:38:59,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:59,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:38:59,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:38:59,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:38:59,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 550 transitions, 8128 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:59,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:59,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:38:59,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:39:00,710 INFO L124 PetriNetUnfolderBase]: 3325/5135 cut-off events. [2024-06-04 15:39:00,710 INFO L125 PetriNetUnfolderBase]: For 329790/329799 co-relation queries the response was YES. [2024-06-04 15:39:00,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41235 conditions, 5135 events. 3325/5135 cut-off events. For 329790/329799 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 28805 event pairs, 525 based on Foata normal form. 10/5140 useless extension candidates. Maximal degree in co-relation 41073. Up to 4109 conditions per place. [2024-06-04 15:39:00,779 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 372 selfloop transitions, 209 changer transitions 0/585 dead transitions. [2024-06-04 15:39:00,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 585 transitions, 9772 flow [2024-06-04 15:39:00,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:39:00,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:39:00,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-04 15:39:00,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-04 15:39:00,780 INFO L175 Difference]: Start difference. First operand has 369 places, 550 transitions, 8128 flow. Second operand 9 states and 165 transitions. [2024-06-04 15:39:00,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 585 transitions, 9772 flow [2024-06-04 15:39:02,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 585 transitions, 9440 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-04 15:39:02,228 INFO L231 Difference]: Finished difference. Result has 371 places, 556 transitions, 8370 flow [2024-06-04 15:39:02,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7796, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8370, PETRI_PLACES=371, PETRI_TRANSITIONS=556} [2024-06-04 15:39:02,228 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 329 predicate places. [2024-06-04 15:39:02,229 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 556 transitions, 8370 flow [2024-06-04 15:39:02,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:39:02,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:39:02,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:39:02,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-04 15:39:02,229 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:39:02,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:39:02,230 INFO L85 PathProgramCache]: Analyzing trace with hash -213927355, now seen corresponding path program 12 times [2024-06-04 15:39:02,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:39:02,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336628883] [2024-06-04 15:39:02,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:39:02,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:39:02,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:39:03,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:39:03,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:39:03,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336628883] [2024-06-04 15:39:03,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336628883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:39:03,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:39:03,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:39:03,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316271661] [2024-06-04 15:39:03,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:39:03,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:39:03,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:39:03,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:39:03,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:39:03,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:39:03,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 556 transitions, 8370 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:39:03,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:39:03,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:39:03,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:39:04,552 INFO L124 PetriNetUnfolderBase]: 3313/5135 cut-off events. [2024-06-04 15:39:04,552 INFO L125 PetriNetUnfolderBase]: For 332788/332797 co-relation queries the response was YES. [2024-06-04 15:39:04,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41627 conditions, 5135 events. 3313/5135 cut-off events. For 332788/332797 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 28944 event pairs, 572 based on Foata normal form. 10/5140 useless extension candidates. Maximal degree in co-relation 41464. Up to 4764 conditions per place. [2024-06-04 15:39:04,620 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 507 selfloop transitions, 78 changer transitions 0/589 dead transitions. [2024-06-04 15:39:04,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 589 transitions, 9768 flow [2024-06-04 15:39:04,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:39:04,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:39:04,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-04 15:39:04,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-04 15:39:04,621 INFO L175 Difference]: Start difference. First operand has 371 places, 556 transitions, 8370 flow. Second operand 11 states and 187 transitions. [2024-06-04 15:39:04,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 589 transitions, 9768 flow [2024-06-04 15:39:05,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 589 transitions, 9511 flow, removed 54 selfloop flow, removed 5 redundant places. [2024-06-04 15:39:05,902 INFO L231 Difference]: Finished difference. Result has 377 places, 556 transitions, 8276 flow [2024-06-04 15:39:05,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8113, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8276, PETRI_PLACES=377, PETRI_TRANSITIONS=556} [2024-06-04 15:39:05,903 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 335 predicate places. [2024-06-04 15:39:05,903 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 556 transitions, 8276 flow [2024-06-04 15:39:05,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:39:05,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:39:05,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:39:05,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-04 15:39:05,904 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:39:05,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:39:05,904 INFO L85 PathProgramCache]: Analyzing trace with hash 170100335, now seen corresponding path program 13 times [2024-06-04 15:39:05,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:39:05,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461853590] [2024-06-04 15:39:05,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:39:05,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:39:05,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:39:06,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:39:06,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:39:06,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461853590] [2024-06-04 15:39:06,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461853590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:39:06,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:39:06,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:39:06,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081928780] [2024-06-04 15:39:06,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:39:06,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:39:06,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:39:06,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:39:06,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:39:06,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:39:06,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 556 transitions, 8276 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:39:06,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:39:06,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:39:06,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:39:08,367 INFO L124 PetriNetUnfolderBase]: 3493/5387 cut-off events. [2024-06-04 15:39:08,367 INFO L125 PetriNetUnfolderBase]: For 389363/389372 co-relation queries the response was YES. [2024-06-04 15:39:08,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44941 conditions, 5387 events. 3493/5387 cut-off events. For 389363/389372 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 30512 event pairs, 551 based on Foata normal form. 10/5392 useless extension candidates. Maximal degree in co-relation 44776. Up to 4656 conditions per place. [2024-06-04 15:39:08,432 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 450 selfloop transitions, 152 changer transitions 0/606 dead transitions. [2024-06-04 15:39:08,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 606 transitions, 10363 flow [2024-06-04 15:39:08,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:39:08,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:39:08,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 192 transitions. [2024-06-04 15:39:08,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42572062084257206 [2024-06-04 15:39:08,434 INFO L175 Difference]: Start difference. First operand has 377 places, 556 transitions, 8276 flow. Second operand 11 states and 192 transitions. [2024-06-04 15:39:08,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 606 transitions, 10363 flow [2024-06-04 15:39:09,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 606 transitions, 10207 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-04 15:39:09,884 INFO L231 Difference]: Finished difference. Result has 379 places, 574 transitions, 8840 flow [2024-06-04 15:39:09,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8120, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8840, PETRI_PLACES=379, PETRI_TRANSITIONS=574} [2024-06-04 15:39:09,885 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 337 predicate places. [2024-06-04 15:39:09,885 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 574 transitions, 8840 flow [2024-06-04 15:39:09,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:39:09,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:39:09,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:39:09,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-04 15:39:09,886 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:39:09,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:39:09,886 INFO L85 PathProgramCache]: Analyzing trace with hash -47294125, now seen corresponding path program 14 times [2024-06-04 15:39:09,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:39:09,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715873324] [2024-06-04 15:39:09,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:39:09,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:39:09,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:39:10,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:39:10,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:39:10,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715873324] [2024-06-04 15:39:10,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715873324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:39:10,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:39:10,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:39:10,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356113209] [2024-06-04 15:39:10,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:39:10,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:39:10,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:39:10,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:39:10,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:39:10,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:39:10,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 574 transitions, 8840 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:39:10,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:39:10,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:39:10,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:39:12,292 INFO L124 PetriNetUnfolderBase]: 3481/5375 cut-off events. [2024-06-04 15:39:12,292 INFO L125 PetriNetUnfolderBase]: For 390945/390954 co-relation queries the response was YES. [2024-06-04 15:39:12,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45193 conditions, 5375 events. 3481/5375 cut-off events. For 390945/390954 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 30474 event pairs, 535 based on Foata normal form. 10/5380 useless extension candidates. Maximal degree in co-relation 45026. Up to 4648 conditions per place. [2024-06-04 15:39:12,379 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 451 selfloop transitions, 154 changer transitions 0/609 dead transitions. [2024-06-04 15:39:12,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 609 transitions, 10605 flow [2024-06-04 15:39:12,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 15:39:12,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 15:39:12,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 206 transitions. [2024-06-04 15:39:12,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186991869918699 [2024-06-04 15:39:12,381 INFO L175 Difference]: Start difference. First operand has 379 places, 574 transitions, 8840 flow. Second operand 12 states and 206 transitions. [2024-06-04 15:39:12,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 609 transitions, 10605 flow [2024-06-04 15:39:13,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 609 transitions, 10386 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-04 15:39:13,912 INFO L231 Difference]: Finished difference. Result has 385 places, 574 transitions, 8935 flow [2024-06-04 15:39:13,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8621, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8935, PETRI_PLACES=385, PETRI_TRANSITIONS=574} [2024-06-04 15:39:13,913 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 343 predicate places. [2024-06-04 15:39:13,913 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 574 transitions, 8935 flow [2024-06-04 15:39:13,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:39:13,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:39:13,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:39:13,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-04 15:39:13,914 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:39:13,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:39:13,914 INFO L85 PathProgramCache]: Analyzing trace with hash -60186715, now seen corresponding path program 15 times [2024-06-04 15:39:13,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:39:13,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726706236] [2024-06-04 15:39:13,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:39:13,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:39:13,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:39:14,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:39:14,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:39:14,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726706236] [2024-06-04 15:39:14,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726706236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:39:14,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:39:14,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:39:14,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134737284] [2024-06-04 15:39:14,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:39:14,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:39:14,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:39:14,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:39:14,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:39:14,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:39:14,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 574 transitions, 8935 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:39:14,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:39:14,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:39:14,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:39:16,393 INFO L124 PetriNetUnfolderBase]: 3469/5365 cut-off events. [2024-06-04 15:39:16,393 INFO L125 PetriNetUnfolderBase]: For 389244/389253 co-relation queries the response was YES. [2024-06-04 15:39:16,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45228 conditions, 5365 events. 3469/5365 cut-off events. For 389244/389253 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 30502 event pairs, 608 based on Foata normal form. 10/5370 useless extension candidates. Maximal degree in co-relation 45059. Up to 4955 conditions per place. [2024-06-04 15:39:16,474 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 508 selfloop transitions, 95 changer transitions 0/607 dead transitions. [2024-06-04 15:39:16,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 607 transitions, 10627 flow [2024-06-04 15:39:16,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 15:39:16,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 15:39:16,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 214 transitions. [2024-06-04 15:39:16,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40150093808630394 [2024-06-04 15:39:16,475 INFO L175 Difference]: Start difference. First operand has 385 places, 574 transitions, 8935 flow. Second operand 13 states and 214 transitions. [2024-06-04 15:39:16,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 607 transitions, 10627 flow [2024-06-04 15:39:18,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 607 transitions, 10303 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-04 15:39:18,209 INFO L231 Difference]: Finished difference. Result has 390 places, 574 transitions, 8808 flow [2024-06-04 15:39:18,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8611, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8808, PETRI_PLACES=390, PETRI_TRANSITIONS=574} [2024-06-04 15:39:18,209 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 348 predicate places. [2024-06-04 15:39:18,210 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 574 transitions, 8808 flow [2024-06-04 15:39:18,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:39:18,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:39:18,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:39:18,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-04 15:39:18,210 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:39:18,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:39:18,211 INFO L85 PathProgramCache]: Analyzing trace with hash -52419355, now seen corresponding path program 16 times [2024-06-04 15:39:18,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:39:18,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568392329] [2024-06-04 15:39:18,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:39:18,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:39:18,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:39:19,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:39:19,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:39:19,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568392329] [2024-06-04 15:39:19,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568392329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:39:19,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:39:19,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:39:19,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82505220] [2024-06-04 15:39:19,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:39:19,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:39:19,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:39:19,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:39:19,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:39:19,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:39:19,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 574 transitions, 8808 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:39:19,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:39:19,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:39:19,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:39:20,497 INFO L124 PetriNetUnfolderBase]: 3457/5339 cut-off events. [2024-06-04 15:39:20,497 INFO L125 PetriNetUnfolderBase]: For 386393/386402 co-relation queries the response was YES. [2024-06-04 15:39:20,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44508 conditions, 5339 events. 3457/5339 cut-off events. For 386393/386402 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 30281 event pairs, 535 based on Foata normal form. 10/5344 useless extension candidates. Maximal degree in co-relation 44338. Up to 4632 conditions per place. [2024-06-04 15:39:20,580 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 455 selfloop transitions, 145 changer transitions 0/604 dead transitions. [2024-06-04 15:39:20,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 604 transitions, 10533 flow [2024-06-04 15:39:20,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:39:20,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:39:20,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-04 15:39:20,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-04 15:39:20,581 INFO L175 Difference]: Start difference. First operand has 390 places, 574 transitions, 8808 flow. Second operand 9 states and 164 transitions. [2024-06-04 15:39:20,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 604 transitions, 10533 flow [2024-06-04 15:39:22,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 604 transitions, 10186 flow, removed 39 selfloop flow, removed 11 redundant places. [2024-06-04 15:39:22,372 INFO L231 Difference]: Finished difference. Result has 388 places, 574 transitions, 8757 flow [2024-06-04 15:39:22,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8461, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8757, PETRI_PLACES=388, PETRI_TRANSITIONS=574} [2024-06-04 15:39:22,373 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 346 predicate places. [2024-06-04 15:39:22,373 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 574 transitions, 8757 flow [2024-06-04 15:39:22,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:39:22,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:39:22,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:39:22,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-04 15:39:22,374 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:39:22,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:39:22,374 INFO L85 PathProgramCache]: Analyzing trace with hash 156976175, now seen corresponding path program 17 times [2024-06-04 15:39:22,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:39:22,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842970595] [2024-06-04 15:39:22,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:39:22,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:39:22,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:39:23,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:39:23,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:39:23,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842970595] [2024-06-04 15:39:23,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842970595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:39:23,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:39:23,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:39:23,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143631304] [2024-06-04 15:39:23,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:39:23,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:39:23,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:39:23,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:39:23,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:39:23,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:39:23,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 574 transitions, 8757 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:39:23,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:39:23,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:39:23,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:39:24,796 INFO L124 PetriNetUnfolderBase]: 3445/5329 cut-off events. [2024-06-04 15:39:24,797 INFO L125 PetriNetUnfolderBase]: For 385325/385334 co-relation queries the response was YES. [2024-06-04 15:39:24,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44108 conditions, 5329 events. 3445/5329 cut-off events. For 385325/385334 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 30273 event pairs, 606 based on Foata normal form. 10/5334 useless extension candidates. Maximal degree in co-relation 43939. Up to 4931 conditions per place. [2024-06-04 15:39:24,877 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 502 selfloop transitions, 95 changer transitions 0/601 dead transitions. [2024-06-04 15:39:24,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 601 transitions, 10252 flow [2024-06-04 15:39:24,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:39:24,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:39:24,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-04 15:39:24,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4079822616407982 [2024-06-04 15:39:24,881 INFO L175 Difference]: Start difference. First operand has 388 places, 574 transitions, 8757 flow. Second operand 11 states and 184 transitions. [2024-06-04 15:39:24,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 601 transitions, 10252 flow [2024-06-04 15:39:26,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 601 transitions, 9888 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-04 15:39:26,739 INFO L231 Difference]: Finished difference. Result has 390 places, 574 transitions, 8589 flow [2024-06-04 15:39:26,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8393, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8589, PETRI_PLACES=390, PETRI_TRANSITIONS=574} [2024-06-04 15:39:26,739 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 348 predicate places. [2024-06-04 15:39:26,740 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 574 transitions, 8589 flow [2024-06-04 15:39:26,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:39:26,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:39:26,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:39:26,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-04 15:39:26,740 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:39:26,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:39:26,741 INFO L85 PathProgramCache]: Analyzing trace with hash -52835065, now seen corresponding path program 18 times [2024-06-04 15:39:26,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:39:26,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783209835] [2024-06-04 15:39:26,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:39:26,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:39:26,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:39:27,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:39:27,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:39:27,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783209835] [2024-06-04 15:39:27,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783209835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:39:27,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:39:27,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:39:27,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710960226] [2024-06-04 15:39:27,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:39:27,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:39:27,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:39:27,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:39:27,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:39:27,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:39:27,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 574 transitions, 8589 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:39:27,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:39:27,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:39:27,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:39:29,032 INFO L124 PetriNetUnfolderBase]: 3433/5305 cut-off events. [2024-06-04 15:39:29,033 INFO L125 PetriNetUnfolderBase]: For 381138/381147 co-relation queries the response was YES. [2024-06-04 15:39:29,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43408 conditions, 5305 events. 3433/5305 cut-off events. For 381138/381147 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 30080 event pairs, 596 based on Foata normal form. 10/5310 useless extension candidates. Maximal degree in co-relation 43238. Up to 4975 conditions per place. [2024-06-04 15:39:29,110 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 506 selfloop transitions, 85 changer transitions 0/595 dead transitions. [2024-06-04 15:39:29,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 595 transitions, 9879 flow [2024-06-04 15:39:29,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:39:29,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:39:29,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-04 15:39:29,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-04 15:39:29,111 INFO L175 Difference]: Start difference. First operand has 390 places, 574 transitions, 8589 flow. Second operand 9 states and 153 transitions. [2024-06-04 15:39:29,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 595 transitions, 9879 flow [2024-06-04 15:39:30,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 595 transitions, 9655 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-04 15:39:30,985 INFO L231 Difference]: Finished difference. Result has 389 places, 574 transitions, 8542 flow [2024-06-04 15:39:30,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8365, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8542, PETRI_PLACES=389, PETRI_TRANSITIONS=574} [2024-06-04 15:39:30,986 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 347 predicate places. [2024-06-04 15:39:30,986 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 574 transitions, 8542 flow [2024-06-04 15:39:30,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:39:30,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:39:30,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:39:30,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-04 15:39:30,987 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:39:30,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:39:30,987 INFO L85 PathProgramCache]: Analyzing trace with hash 261577271, now seen corresponding path program 19 times [2024-06-04 15:39:30,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:39:30,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968833622] [2024-06-04 15:39:30,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:39:30,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:39:30,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:39:31,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:39:31,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:39:31,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968833622] [2024-06-04 15:39:31,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968833622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:39:31,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:39:31,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:39:31,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545447487] [2024-06-04 15:39:31,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:39:31,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:39:31,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:39:31,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:39:31,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:39:31,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:39:31,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 574 transitions, 8542 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:39:31,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:39:31,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:39:31,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:39:33,270 INFO L124 PetriNetUnfolderBase]: 3453/5343 cut-off events. [2024-06-04 15:39:33,270 INFO L125 PetriNetUnfolderBase]: For 390155/390164 co-relation queries the response was YES. [2024-06-04 15:39:33,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43648 conditions, 5343 events. 3453/5343 cut-off events. For 390155/390164 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 30390 event pairs, 604 based on Foata normal form. 10/5348 useless extension candidates. Maximal degree in co-relation 43477. Up to 4887 conditions per place. [2024-06-04 15:39:33,350 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 522 selfloop transitions, 90 changer transitions 0/616 dead transitions. [2024-06-04 15:39:33,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 616 transitions, 10368 flow [2024-06-04 15:39:33,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:39:33,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:39:33,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-04 15:39:33,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-04 15:39:33,351 INFO L175 Difference]: Start difference. First operand has 389 places, 574 transitions, 8542 flow. Second operand 10 states and 180 transitions. [2024-06-04 15:39:33,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 616 transitions, 10368 flow [2024-06-04 15:39:34,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 616 transitions, 10169 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-04 15:39:34,989 INFO L231 Difference]: Finished difference. Result has 390 places, 577 transitions, 8584 flow [2024-06-04 15:39:34,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8343, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8584, PETRI_PLACES=390, PETRI_TRANSITIONS=577} [2024-06-04 15:39:34,990 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 348 predicate places. [2024-06-04 15:39:34,990 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 577 transitions, 8584 flow [2024-06-04 15:39:34,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:39:34,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:39:34,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:39:34,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-04 15:39:34,991 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:39:34,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:39:34,991 INFO L85 PathProgramCache]: Analyzing trace with hash 2009064211, now seen corresponding path program 20 times [2024-06-04 15:39:34,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:39:34,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792376734] [2024-06-04 15:39:34,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:39:34,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:39:34,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:39:35,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:39:35,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:39:35,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792376734] [2024-06-04 15:39:35,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792376734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:39:35,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:39:35,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:39:35,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027324621] [2024-06-04 15:39:35,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:39:35,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:39:35,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:39:35,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:39:35,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:39:35,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:39:35,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 577 transitions, 8584 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:39:35,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:39:35,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:39:35,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:39:37,320 INFO L124 PetriNetUnfolderBase]: 3441/5329 cut-off events. [2024-06-04 15:39:37,321 INFO L125 PetriNetUnfolderBase]: For 387637/387646 co-relation queries the response was YES. [2024-06-04 15:39:37,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43425 conditions, 5329 events. 3441/5329 cut-off events. For 387637/387646 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 30334 event pairs, 596 based on Foata normal form. 10/5334 useless extension candidates. Maximal degree in co-relation 43253. Up to 4879 conditions per place. [2024-06-04 15:39:37,403 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 516 selfloop transitions, 86 changer transitions 0/606 dead transitions. [2024-06-04 15:39:37,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 606 transitions, 10120 flow [2024-06-04 15:39:37,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:39:37,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:39:37,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-04 15:39:37,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-04 15:39:37,405 INFO L175 Difference]: Start difference. First operand has 390 places, 577 transitions, 8584 flow. Second operand 8 states and 146 transitions. [2024-06-04 15:39:37,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 606 transitions, 10120 flow [2024-06-04 15:39:39,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 606 transitions, 9780 flow, removed 37 selfloop flow, removed 8 redundant places. [2024-06-04 15:39:39,277 INFO L231 Difference]: Finished difference. Result has 390 places, 577 transitions, 8422 flow [2024-06-04 15:39:39,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8244, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8422, PETRI_PLACES=390, PETRI_TRANSITIONS=577} [2024-06-04 15:39:39,292 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 348 predicate places. [2024-06-04 15:39:39,292 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 577 transitions, 8422 flow [2024-06-04 15:39:39,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:39:39,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:39:39,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:39:39,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-04 15:39:39,293 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:39:39,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:39:39,294 INFO L85 PathProgramCache]: Analyzing trace with hash 2016410281, now seen corresponding path program 21 times [2024-06-04 15:39:39,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:39:39,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753480203] [2024-06-04 15:39:39,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:39:39,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:39:39,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:39:40,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:39:40,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:39:40,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753480203] [2024-06-04 15:39:40,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753480203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:39:40,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:39:40,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:39:40,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373224849] [2024-06-04 15:39:40,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:39:40,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:39:40,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:39:40,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:39:40,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:39:40,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:39:40,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 577 transitions, 8422 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:39:40,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:39:40,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:39:40,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:39:41,558 INFO L124 PetriNetUnfolderBase]: 3429/5307 cut-off events. [2024-06-04 15:39:41,559 INFO L125 PetriNetUnfolderBase]: For 382686/382695 co-relation queries the response was YES. [2024-06-04 15:39:41,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42786 conditions, 5307 events. 3429/5307 cut-off events. For 382686/382695 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 30139 event pairs, 600 based on Foata normal form. 10/5312 useless extension candidates. Maximal degree in co-relation 42614. Up to 4923 conditions per place. [2024-06-04 15:39:41,638 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 514 selfloop transitions, 86 changer transitions 0/604 dead transitions. [2024-06-04 15:39:41,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 604 transitions, 9759 flow [2024-06-04 15:39:41,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:39:41,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:39:41,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-04 15:39:41,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-04 15:39:41,639 INFO L175 Difference]: Start difference. First operand has 390 places, 577 transitions, 8422 flow. Second operand 8 states and 146 transitions. [2024-06-04 15:39:41,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 604 transitions, 9759 flow [2024-06-04 15:39:43,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 604 transitions, 9587 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-04 15:39:43,817 INFO L231 Difference]: Finished difference. Result has 392 places, 577 transitions, 8429 flow [2024-06-04 15:39:43,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8250, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8429, PETRI_PLACES=392, PETRI_TRANSITIONS=577} [2024-06-04 15:39:43,818 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 350 predicate places. [2024-06-04 15:39:43,818 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 577 transitions, 8429 flow [2024-06-04 15:39:43,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:39:43,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:39:43,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:39:43,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-04 15:39:43,818 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:39:43,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:39:43,819 INFO L85 PathProgramCache]: Analyzing trace with hash 320087886, now seen corresponding path program 2 times [2024-06-04 15:39:43,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:39:43,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083661224] [2024-06-04 15:39:43,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:39:43,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:39:43,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:39:44,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:39:44,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:39:44,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083661224] [2024-06-04 15:39:44,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083661224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:39:44,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:39:44,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:39:44,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075203061] [2024-06-04 15:39:44,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:39:44,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:39:44,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:39:44,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:39:44,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:39:44,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:39:44,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 577 transitions, 8429 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:39:44,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:39:44,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:39:44,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:39:46,063 INFO L124 PetriNetUnfolderBase]: 3439/5300 cut-off events. [2024-06-04 15:39:46,063 INFO L125 PetriNetUnfolderBase]: For 384786/384795 co-relation queries the response was YES. [2024-06-04 15:39:46,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42977 conditions, 5300 events. 3439/5300 cut-off events. For 384786/384795 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 29870 event pairs, 586 based on Foata normal form. 8/5303 useless extension candidates. Maximal degree in co-relation 42804. Up to 5087 conditions per place. [2024-06-04 15:39:46,140 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 553 selfloop transitions, 39 changer transitions 0/596 dead transitions. [2024-06-04 15:39:46,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 596 transitions, 9798 flow [2024-06-04 15:39:46,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:39:46,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:39:46,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-04 15:39:46,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-04 15:39:46,151 INFO L175 Difference]: Start difference. First operand has 392 places, 577 transitions, 8429 flow. Second operand 7 states and 119 transitions. [2024-06-04 15:39:46,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 596 transitions, 9798 flow [2024-06-04 15:39:47,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 596 transitions, 9523 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-04 15:39:47,927 INFO L231 Difference]: Finished difference. Result has 392 places, 583 transitions, 8373 flow [2024-06-04 15:39:47,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8154, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8373, PETRI_PLACES=392, PETRI_TRANSITIONS=583} [2024-06-04 15:39:47,928 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 350 predicate places. [2024-06-04 15:39:47,928 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 583 transitions, 8373 flow [2024-06-04 15:39:47,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:39:47,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:39:47,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:39:47,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-04 15:39:47,928 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:39:47,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:39:47,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1504659951, now seen corresponding path program 22 times [2024-06-04 15:39:47,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:39:47,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483585539] [2024-06-04 15:39:47,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:39:47,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:39:47,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:39:48,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:39:48,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:39:48,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483585539] [2024-06-04 15:39:48,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483585539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:39:48,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:39:48,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:39:48,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575165573] [2024-06-04 15:39:48,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:39:48,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:39:48,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:39:48,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:39:48,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:39:48,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:39:48,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 583 transitions, 8373 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:39:48,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:39:48,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:39:48,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:39:50,046 INFO L124 PetriNetUnfolderBase]: 3491/5397 cut-off events. [2024-06-04 15:39:50,046 INFO L125 PetriNetUnfolderBase]: For 416696/416705 co-relation queries the response was YES. [2024-06-04 15:39:50,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44448 conditions, 5397 events. 3491/5397 cut-off events. For 416696/416705 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 30763 event pairs, 589 based on Foata normal form. 10/5402 useless extension candidates. Maximal degree in co-relation 44273. Up to 4692 conditions per place. [2024-06-04 15:39:50,127 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 484 selfloop transitions, 128 changer transitions 0/616 dead transitions. [2024-06-04 15:39:50,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 616 transitions, 10272 flow [2024-06-04 15:39:50,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:39:50,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:39:50,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-04 15:39:50,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-04 15:39:50,129 INFO L175 Difference]: Start difference. First operand has 392 places, 583 transitions, 8373 flow. Second operand 8 states and 148 transitions. [2024-06-04 15:39:50,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 616 transitions, 10272 flow [2024-06-04 15:39:52,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 616 transitions, 10121 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-04 15:39:52,354 INFO L231 Difference]: Finished difference. Result has 395 places, 589 transitions, 8636 flow [2024-06-04 15:39:52,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8226, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8636, PETRI_PLACES=395, PETRI_TRANSITIONS=589} [2024-06-04 15:39:52,354 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 353 predicate places. [2024-06-04 15:39:52,355 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 589 transitions, 8636 flow [2024-06-04 15:39:52,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:39:52,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:39:52,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:39:52,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-04 15:39:52,355 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:39:52,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:39:52,356 INFO L85 PathProgramCache]: Analyzing trace with hash 496952279, now seen corresponding path program 23 times [2024-06-04 15:39:52,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:39:52,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425279465] [2024-06-04 15:39:52,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:39:52,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:39:52,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:39:53,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:39:53,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:39:53,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425279465] [2024-06-04 15:39:53,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425279465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:39:53,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:39:53,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:39:53,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123017533] [2024-06-04 15:39:53,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:39:53,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:39:53,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:39:53,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:39:53,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:39:53,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:39:53,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 589 transitions, 8636 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:39:53,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:39:53,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:39:53,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:39:54,462 INFO L124 PetriNetUnfolderBase]: 3543/5458 cut-off events. [2024-06-04 15:39:54,463 INFO L125 PetriNetUnfolderBase]: For 432505/432514 co-relation queries the response was YES. [2024-06-04 15:39:54,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45783 conditions, 5458 events. 3543/5458 cut-off events. For 432505/432514 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 30961 event pairs, 596 based on Foata normal form. 10/5463 useless extension candidates. Maximal degree in co-relation 45608. Up to 5112 conditions per place. [2024-06-04 15:39:54,553 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 561 selfloop transitions, 50 changer transitions 0/615 dead transitions. [2024-06-04 15:39:54,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 615 transitions, 10487 flow [2024-06-04 15:39:54,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:39:54,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:39:54,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-04 15:39:54,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-04 15:39:54,554 INFO L175 Difference]: Start difference. First operand has 395 places, 589 transitions, 8636 flow. Second operand 8 states and 139 transitions. [2024-06-04 15:39:54,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 615 transitions, 10487 flow [2024-06-04 15:39:56,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 615 transitions, 10229 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-04 15:39:56,590 INFO L231 Difference]: Finished difference. Result has 399 places, 595 transitions, 8644 flow [2024-06-04 15:39:56,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8384, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8644, PETRI_PLACES=399, PETRI_TRANSITIONS=595} [2024-06-04 15:39:56,590 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 357 predicate places. [2024-06-04 15:39:56,590 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 595 transitions, 8644 flow [2024-06-04 15:39:56,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:39:56,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:39:56,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:39:56,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-04 15:39:56,591 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:39:56,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:39:56,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1317149631, now seen corresponding path program 24 times [2024-06-04 15:39:56,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:39:56,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208897357] [2024-06-04 15:39:56,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:39:56,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:39:56,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:39:57,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:39:57,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:39:57,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208897357] [2024-06-04 15:39:57,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208897357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:39:57,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:39:57,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:39:57,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008602500] [2024-06-04 15:39:57,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:39:57,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:39:57,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:39:57,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:39:57,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:39:57,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:39:57,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 595 transitions, 8644 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:39:57,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:39:57,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:39:57,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:39:58,713 INFO L124 PetriNetUnfolderBase]: 3531/5436 cut-off events. [2024-06-04 15:39:58,713 INFO L125 PetriNetUnfolderBase]: For 427320/427329 co-relation queries the response was YES. [2024-06-04 15:39:58,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44891 conditions, 5436 events. 3531/5436 cut-off events. For 427320/427329 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 30803 event pairs, 604 based on Foata normal form. 10/5441 useless extension candidates. Maximal degree in co-relation 44715. Up to 5212 conditions per place. [2024-06-04 15:39:58,795 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 574 selfloop transitions, 33 changer transitions 0/611 dead transitions. [2024-06-04 15:39:58,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 611 transitions, 9969 flow [2024-06-04 15:39:58,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:39:58,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:39:58,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-04 15:39:58,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-04 15:39:58,796 INFO L175 Difference]: Start difference. First operand has 399 places, 595 transitions, 8644 flow. Second operand 8 states and 132 transitions. [2024-06-04 15:39:58,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 611 transitions, 9969 flow [2024-06-04 15:40:00,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 611 transitions, 9546 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-04 15:40:00,972 INFO L231 Difference]: Finished difference. Result has 400 places, 595 transitions, 8293 flow [2024-06-04 15:40:00,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8221, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=562, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8293, PETRI_PLACES=400, PETRI_TRANSITIONS=595} [2024-06-04 15:40:00,973 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 358 predicate places. [2024-06-04 15:40:00,973 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 595 transitions, 8293 flow [2024-06-04 15:40:00,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:00,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:40:00,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:40:00,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-04 15:40:00,974 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:40:00,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:40:00,974 INFO L85 PathProgramCache]: Analyzing trace with hash 292308727, now seen corresponding path program 4 times [2024-06-04 15:40:00,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:40:00,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660276847] [2024-06-04 15:40:00,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:40:00,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:40:00,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:40:01,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:40:01,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:40:01,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660276847] [2024-06-04 15:40:01,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660276847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:40:01,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:40:01,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:40:01,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250402973] [2024-06-04 15:40:01,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:40:01,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:40:01,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:40:01,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:40:01,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:40:01,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:40:01,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 595 transitions, 8293 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:01,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:40:01,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:40:01,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:40:03,249 INFO L124 PetriNetUnfolderBase]: 3533/5437 cut-off events. [2024-06-04 15:40:03,250 INFO L125 PetriNetUnfolderBase]: For 422538/422540 co-relation queries the response was YES. [2024-06-04 15:40:03,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44092 conditions, 5437 events. 3533/5437 cut-off events. For 422538/422540 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 30710 event pairs, 620 based on Foata normal form. 2/5430 useless extension candidates. Maximal degree in co-relation 43916. Up to 5179 conditions per place. [2024-06-04 15:40:03,329 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 562 selfloop transitions, 46 changer transitions 0/612 dead transitions. [2024-06-04 15:40:03,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 612 transitions, 9653 flow [2024-06-04 15:40:03,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:40:03,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:40:03,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-04 15:40:03,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-04 15:40:03,330 INFO L175 Difference]: Start difference. First operand has 400 places, 595 transitions, 8293 flow. Second operand 8 states and 131 transitions. [2024-06-04 15:40:03,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 612 transitions, 9653 flow [2024-06-04 15:40:05,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 612 transitions, 9547 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-04 15:40:05,583 INFO L231 Difference]: Finished difference. Result has 402 places, 601 transitions, 8409 flow [2024-06-04 15:40:05,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8187, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8409, PETRI_PLACES=402, PETRI_TRANSITIONS=601} [2024-06-04 15:40:05,584 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 360 predicate places. [2024-06-04 15:40:05,584 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 601 transitions, 8409 flow [2024-06-04 15:40:05,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:05,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:40:05,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:40:05,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-04 15:40:05,585 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:40:05,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:40:05,585 INFO L85 PathProgramCache]: Analyzing trace with hash 274707011, now seen corresponding path program 25 times [2024-06-04 15:40:05,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:40:05,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277008311] [2024-06-04 15:40:05,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:40:05,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:40:05,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:40:06,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:40:06,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:40:06,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277008311] [2024-06-04 15:40:06,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277008311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:40:06,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:40:06,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:40:06,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613701116] [2024-06-04 15:40:06,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:40:06,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:40:06,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:40:06,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:40:06,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:40:06,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:40:06,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 601 transitions, 8409 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:06,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:40:06,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:40:06,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:40:07,817 INFO L124 PetriNetUnfolderBase]: 3553/5486 cut-off events. [2024-06-04 15:40:07,818 INFO L125 PetriNetUnfolderBase]: For 441464/441473 co-relation queries the response was YES. [2024-06-04 15:40:07,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44942 conditions, 5486 events. 3553/5486 cut-off events. For 441464/441473 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 31274 event pairs, 597 based on Foata normal form. 10/5491 useless extension candidates. Maximal degree in co-relation 44764. Up to 4743 conditions per place. [2024-06-04 15:40:07,892 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 489 selfloop transitions, 138 changer transitions 0/631 dead transitions. [2024-06-04 15:40:07,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 631 transitions, 10261 flow [2024-06-04 15:40:07,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:40:07,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:40:07,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-04 15:40:07,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-04 15:40:07,893 INFO L175 Difference]: Start difference. First operand has 402 places, 601 transitions, 8409 flow. Second operand 8 states and 148 transitions. [2024-06-04 15:40:07,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 631 transitions, 10261 flow [2024-06-04 15:40:10,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 631 transitions, 10087 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-04 15:40:10,091 INFO L231 Difference]: Finished difference. Result has 405 places, 604 transitions, 8568 flow [2024-06-04 15:40:10,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8235, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8568, PETRI_PLACES=405, PETRI_TRANSITIONS=604} [2024-06-04 15:40:10,092 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 363 predicate places. [2024-06-04 15:40:10,093 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 604 transitions, 8568 flow [2024-06-04 15:40:10,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:10,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:40:10,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:40:10,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-04 15:40:10,093 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:40:10,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:40:10,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1310483391, now seen corresponding path program 26 times [2024-06-04 15:40:10,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:40:10,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487332172] [2024-06-04 15:40:10,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:40:10,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:40:10,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:40:10,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:40:10,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:40:10,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487332172] [2024-06-04 15:40:10,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487332172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:40:10,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:40:10,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:40:10,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857935205] [2024-06-04 15:40:10,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:40:10,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:40:10,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:40:10,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:40:10,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:40:11,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:40:11,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 604 transitions, 8568 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:11,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:40:11,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:40:11,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:40:12,312 INFO L124 PetriNetUnfolderBase]: 3541/5457 cut-off events. [2024-06-04 15:40:12,312 INFO L125 PetriNetUnfolderBase]: For 437499/437508 co-relation queries the response was YES. [2024-06-04 15:40:12,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44858 conditions, 5457 events. 3541/5457 cut-off events. For 437499/437508 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 31003 event pairs, 582 based on Foata normal form. 10/5462 useless extension candidates. Maximal degree in co-relation 44679. Up to 5127 conditions per place. [2024-06-04 15:40:12,396 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 566 selfloop transitions, 52 changer transitions 0/622 dead transitions. [2024-06-04 15:40:12,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 622 transitions, 9955 flow [2024-06-04 15:40:12,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:40:12,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:40:12,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-04 15:40:12,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-04 15:40:12,397 INFO L175 Difference]: Start difference. First operand has 405 places, 604 transitions, 8568 flow. Second operand 8 states and 136 transitions. [2024-06-04 15:40:12,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 622 transitions, 9955 flow [2024-06-04 15:40:14,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 622 transitions, 9658 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-04 15:40:14,586 INFO L231 Difference]: Finished difference. Result has 408 places, 604 transitions, 8381 flow [2024-06-04 15:40:14,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8271, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8381, PETRI_PLACES=408, PETRI_TRANSITIONS=604} [2024-06-04 15:40:14,587 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 366 predicate places. [2024-06-04 15:40:14,587 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 604 transitions, 8381 flow [2024-06-04 15:40:14,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:14,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:40:14,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:40:14,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-04 15:40:14,587 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:40:14,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:40:14,588 INFO L85 PathProgramCache]: Analyzing trace with hash 753898476, now seen corresponding path program 3 times [2024-06-04 15:40:14,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:40:14,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105216889] [2024-06-04 15:40:14,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:40:14,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:40:14,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:40:15,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:40:15,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:40:15,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105216889] [2024-06-04 15:40:15,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105216889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:40:15,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:40:15,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:40:15,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719107370] [2024-06-04 15:40:15,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:40:15,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:40:15,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:40:15,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:40:15,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:40:15,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:40:15,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 604 transitions, 8381 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:15,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:40:15,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:40:15,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:40:16,694 INFO L124 PetriNetUnfolderBase]: 3543/5468 cut-off events. [2024-06-04 15:40:16,694 INFO L125 PetriNetUnfolderBase]: For 435175/435184 co-relation queries the response was YES. [2024-06-04 15:40:16,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44517 conditions, 5468 events. 3543/5468 cut-off events. For 435175/435184 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 31159 event pairs, 590 based on Foata normal form. 8/5471 useless extension candidates. Maximal degree in co-relation 44337. Up to 5182 conditions per place. [2024-06-04 15:40:16,776 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 563 selfloop transitions, 55 changer transitions 0/622 dead transitions. [2024-06-04 15:40:16,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 622 transitions, 9820 flow [2024-06-04 15:40:16,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:40:16,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:40:16,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-04 15:40:16,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42160278745644597 [2024-06-04 15:40:16,777 INFO L175 Difference]: Start difference. First operand has 408 places, 604 transitions, 8381 flow. Second operand 7 states and 121 transitions. [2024-06-04 15:40:16,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 622 transitions, 9820 flow [2024-06-04 15:40:19,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 622 transitions, 9706 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-04 15:40:19,130 INFO L231 Difference]: Finished difference. Result has 408 places, 607 transitions, 8483 flow [2024-06-04 15:40:19,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8267, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8483, PETRI_PLACES=408, PETRI_TRANSITIONS=607} [2024-06-04 15:40:19,131 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 366 predicate places. [2024-06-04 15:40:19,131 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 607 transitions, 8483 flow [2024-06-04 15:40:19,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:19,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:40:19,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:40:19,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-04 15:40:19,132 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:40:19,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:40:19,132 INFO L85 PathProgramCache]: Analyzing trace with hash 269344631, now seen corresponding path program 27 times [2024-06-04 15:40:19,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:40:19,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099116354] [2024-06-04 15:40:19,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:40:19,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:40:19,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:40:19,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:40:19,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:40:19,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099116354] [2024-06-04 15:40:19,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099116354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:40:19,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:40:19,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:40:19,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26516867] [2024-06-04 15:40:19,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:40:19,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:40:19,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:40:19,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:40:19,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:40:19,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:40:19,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 607 transitions, 8483 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:19,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:40:19,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:40:19,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:40:21,328 INFO L124 PetriNetUnfolderBase]: 3531/5453 cut-off events. [2024-06-04 15:40:21,329 INFO L125 PetriNetUnfolderBase]: For 438069/438078 co-relation queries the response was YES. [2024-06-04 15:40:21,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44396 conditions, 5453 events. 3531/5453 cut-off events. For 438069/438078 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 31046 event pairs, 551 based on Foata normal form. 10/5458 useless extension candidates. Maximal degree in co-relation 44215. Up to 4730 conditions per place. [2024-06-04 15:40:21,411 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 484 selfloop transitions, 147 changer transitions 0/635 dead transitions. [2024-06-04 15:40:21,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 635 transitions, 9966 flow [2024-06-04 15:40:21,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:40:21,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:40:21,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-04 15:40:21,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-04 15:40:21,412 INFO L175 Difference]: Start difference. First operand has 408 places, 607 transitions, 8483 flow. Second operand 8 states and 149 transitions. [2024-06-04 15:40:21,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 635 transitions, 9966 flow [2024-06-04 15:40:23,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 635 transitions, 9758 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-04 15:40:23,556 INFO L231 Difference]: Finished difference. Result has 410 places, 607 transitions, 8575 flow [2024-06-04 15:40:23,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8275, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8575, PETRI_PLACES=410, PETRI_TRANSITIONS=607} [2024-06-04 15:40:23,557 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 368 predicate places. [2024-06-04 15:40:23,557 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 607 transitions, 8575 flow [2024-06-04 15:40:23,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:23,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:40:23,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:40:23,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-04 15:40:23,558 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:40:23,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:40:23,558 INFO L85 PathProgramCache]: Analyzing trace with hash 579816969, now seen corresponding path program 1 times [2024-06-04 15:40:23,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:40:23,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67750798] [2024-06-04 15:40:23,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:40:23,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:40:23,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:40:24,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:40:24,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:40:24,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67750798] [2024-06-04 15:40:24,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67750798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:40:24,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:40:24,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:40:24,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773987582] [2024-06-04 15:40:24,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:40:24,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:40:24,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:40:24,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:40:24,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:40:24,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:40:24,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 607 transitions, 8575 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:24,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:40:24,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:40:24,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:40:26,116 INFO L124 PetriNetUnfolderBase]: 3618/5577 cut-off events. [2024-06-04 15:40:26,116 INFO L125 PetriNetUnfolderBase]: For 490383/490385 co-relation queries the response was YES. [2024-06-04 15:40:26,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46336 conditions, 5577 events. 3618/5577 cut-off events. For 490383/490385 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 31705 event pairs, 644 based on Foata normal form. 8/5583 useless extension candidates. Maximal degree in co-relation 46155. Up to 5013 conditions per place. [2024-06-04 15:40:26,197 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 564 selfloop transitions, 87 changer transitions 0/655 dead transitions. [2024-06-04 15:40:26,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 655 transitions, 10376 flow [2024-06-04 15:40:26,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:40:26,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:40:26,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-04 15:40:26,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44634146341463415 [2024-06-04 15:40:26,198 INFO L175 Difference]: Start difference. First operand has 410 places, 607 transitions, 8575 flow. Second operand 10 states and 183 transitions. [2024-06-04 15:40:26,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 655 transitions, 10376 flow [2024-06-04 15:40:27,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 655 transitions, 9821 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-04 15:40:27,761 INFO L231 Difference]: Finished difference. Result has 414 places, 612 transitions, 8307 flow [2024-06-04 15:40:27,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8020, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8307, PETRI_PLACES=414, PETRI_TRANSITIONS=612} [2024-06-04 15:40:27,761 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 372 predicate places. [2024-06-04 15:40:27,761 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 612 transitions, 8307 flow [2024-06-04 15:40:27,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:27,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:40:27,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:40:27,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-04 15:40:27,762 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:40:27,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:40:27,762 INFO L85 PathProgramCache]: Analyzing trace with hash 581694639, now seen corresponding path program 2 times [2024-06-04 15:40:27,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:40:27,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78876498] [2024-06-04 15:40:27,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:40:27,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:40:27,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:40:28,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:40:28,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:40:28,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78876498] [2024-06-04 15:40:28,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78876498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:40:28,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:40:28,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:40:28,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686988165] [2024-06-04 15:40:28,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:40:28,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:40:28,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:40:28,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:40:28,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:40:28,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:40:28,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 612 transitions, 8307 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:28,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:40:28,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:40:28,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:40:30,303 INFO L124 PetriNetUnfolderBase]: 3654/5633 cut-off events. [2024-06-04 15:40:30,304 INFO L125 PetriNetUnfolderBase]: For 507173/507175 co-relation queries the response was YES. [2024-06-04 15:40:30,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46191 conditions, 5633 events. 3654/5633 cut-off events. For 507173/507175 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 32076 event pairs, 664 based on Foata normal form. 10/5641 useless extension candidates. Maximal degree in co-relation 46008. Up to 5244 conditions per place. [2024-06-04 15:40:30,384 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 544 selfloop transitions, 96 changer transitions 0/644 dead transitions. [2024-06-04 15:40:30,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 644 transitions, 9950 flow [2024-06-04 15:40:30,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:40:30,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:40:30,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-04 15:40:30,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4317073170731707 [2024-06-04 15:40:30,386 INFO L175 Difference]: Start difference. First operand has 414 places, 612 transitions, 8307 flow. Second operand 10 states and 177 transitions. [2024-06-04 15:40:30,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 644 transitions, 9950 flow [2024-06-04 15:40:32,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 644 transitions, 9824 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-04 15:40:32,686 INFO L231 Difference]: Finished difference. Result has 419 places, 613 transitions, 8401 flow [2024-06-04 15:40:32,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8181, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8401, PETRI_PLACES=419, PETRI_TRANSITIONS=613} [2024-06-04 15:40:32,686 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 377 predicate places. [2024-06-04 15:40:32,686 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 613 transitions, 8401 flow [2024-06-04 15:40:32,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:32,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:40:32,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:40:32,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-04 15:40:32,687 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:40:32,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:40:32,687 INFO L85 PathProgramCache]: Analyzing trace with hash 581690919, now seen corresponding path program 3 times [2024-06-04 15:40:32,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:40:32,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946742090] [2024-06-04 15:40:32,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:40:32,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:40:32,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:40:33,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:40:33,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:40:33,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946742090] [2024-06-04 15:40:33,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946742090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:40:33,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:40:33,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:40:33,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95090177] [2024-06-04 15:40:33,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:40:33,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:40:33,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:40:33,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:40:33,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:40:33,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:40:33,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 613 transitions, 8401 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:33,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:40:33,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:40:33,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:40:35,249 INFO L124 PetriNetUnfolderBase]: 3682/5677 cut-off events. [2024-06-04 15:40:35,249 INFO L125 PetriNetUnfolderBase]: For 511881/511883 co-relation queries the response was YES. [2024-06-04 15:40:35,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46873 conditions, 5677 events. 3682/5677 cut-off events. For 511881/511883 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 32414 event pairs, 662 based on Foata normal form. 8/5683 useless extension candidates. Maximal degree in co-relation 46688. Up to 5250 conditions per place. [2024-06-04 15:40:35,341 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 549 selfloop transitions, 98 changer transitions 0/651 dead transitions. [2024-06-04 15:40:35,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 651 transitions, 10137 flow [2024-06-04 15:40:35,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:40:35,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:40:35,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-04 15:40:35,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44146341463414634 [2024-06-04 15:40:35,342 INFO L175 Difference]: Start difference. First operand has 419 places, 613 transitions, 8401 flow. Second operand 10 states and 181 transitions. [2024-06-04 15:40:35,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 651 transitions, 10137 flow [2024-06-04 15:40:37,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 651 transitions, 9940 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-04 15:40:37,217 INFO L231 Difference]: Finished difference. Result has 422 places, 616 transitions, 8466 flow [2024-06-04 15:40:37,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8204, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8466, PETRI_PLACES=422, PETRI_TRANSITIONS=616} [2024-06-04 15:40:37,217 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 380 predicate places. [2024-06-04 15:40:37,218 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 616 transitions, 8466 flow [2024-06-04 15:40:37,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:37,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:40:37,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:40:37,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-04 15:40:37,218 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:40:37,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:40:37,219 INFO L85 PathProgramCache]: Analyzing trace with hash 668386449, now seen corresponding path program 4 times [2024-06-04 15:40:37,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:40:37,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681369158] [2024-06-04 15:40:37,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:40:37,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:40:37,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:40:38,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:40:38,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:40:38,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681369158] [2024-06-04 15:40:38,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681369158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:40:38,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:40:38,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:40:38,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475474799] [2024-06-04 15:40:38,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:40:38,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:40:38,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:40:38,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:40:38,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:40:38,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:40:38,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 616 transitions, 8466 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:38,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:40:38,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:40:38,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:40:39,820 INFO L124 PetriNetUnfolderBase]: 3726/5745 cut-off events. [2024-06-04 15:40:39,820 INFO L125 PetriNetUnfolderBase]: For 539092/539094 co-relation queries the response was YES. [2024-06-04 15:40:39,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47592 conditions, 5745 events. 3726/5745 cut-off events. For 539092/539094 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 32842 event pairs, 680 based on Foata normal form. 12/5755 useless extension candidates. Maximal degree in co-relation 47405. Up to 5431 conditions per place. [2024-06-04 15:40:39,912 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 584 selfloop transitions, 58 changer transitions 0/646 dead transitions. [2024-06-04 15:40:39,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 646 transitions, 9951 flow [2024-06-04 15:40:39,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:40:39,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:40:39,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-04 15:40:39,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4079822616407982 [2024-06-04 15:40:39,914 INFO L175 Difference]: Start difference. First operand has 422 places, 616 transitions, 8466 flow. Second operand 11 states and 184 transitions. [2024-06-04 15:40:39,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 646 transitions, 9951 flow [2024-06-04 15:40:42,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 646 transitions, 9815 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-04 15:40:42,135 INFO L231 Difference]: Finished difference. Result has 427 places, 617 transitions, 8479 flow [2024-06-04 15:40:42,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8330, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8479, PETRI_PLACES=427, PETRI_TRANSITIONS=617} [2024-06-04 15:40:42,135 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 385 predicate places. [2024-06-04 15:40:42,135 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 617 transitions, 8479 flow [2024-06-04 15:40:42,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:42,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:40:42,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:40:42,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-04 15:40:42,136 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:40:42,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:40:42,137 INFO L85 PathProgramCache]: Analyzing trace with hash 668382729, now seen corresponding path program 5 times [2024-06-04 15:40:42,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:40:42,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182574224] [2024-06-04 15:40:42,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:40:42,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:40:42,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:40:43,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:40:43,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:40:43,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182574224] [2024-06-04 15:40:43,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182574224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:40:43,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:40:43,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:40:43,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362398929] [2024-06-04 15:40:43,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:40:43,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:40:43,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:40:43,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:40:43,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:40:43,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:40:43,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 617 transitions, 8479 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:43,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:40:43,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:40:43,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:40:44,701 INFO L124 PetriNetUnfolderBase]: 3754/5789 cut-off events. [2024-06-04 15:40:44,701 INFO L125 PetriNetUnfolderBase]: For 535704/535706 co-relation queries the response was YES. [2024-06-04 15:40:44,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48187 conditions, 5789 events. 3754/5789 cut-off events. For 535704/535706 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 33172 event pairs, 674 based on Foata normal form. 8/5795 useless extension candidates. Maximal degree in co-relation 47998. Up to 5437 conditions per place. [2024-06-04 15:40:44,789 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 589 selfloop transitions, 59 changer transitions 0/652 dead transitions. [2024-06-04 15:40:44,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 652 transitions, 10055 flow [2024-06-04 15:40:44,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:40:44,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:40:44,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-04 15:40:44,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292682926829268 [2024-06-04 15:40:44,791 INFO L175 Difference]: Start difference. First operand has 427 places, 617 transitions, 8479 flow. Second operand 10 states and 176 transitions. [2024-06-04 15:40:44,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 652 transitions, 10055 flow [2024-06-04 15:40:47,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 652 transitions, 9931 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-04 15:40:47,395 INFO L231 Difference]: Finished difference. Result has 429 places, 620 transitions, 8548 flow [2024-06-04 15:40:47,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8355, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8548, PETRI_PLACES=429, PETRI_TRANSITIONS=620} [2024-06-04 15:40:47,395 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 387 predicate places. [2024-06-04 15:40:47,395 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 620 transitions, 8548 flow [2024-06-04 15:40:47,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:47,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:40:47,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:40:47,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-04 15:40:47,396 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:40:47,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:40:47,396 INFO L85 PathProgramCache]: Analyzing trace with hash -46840285, now seen corresponding path program 1 times [2024-06-04 15:40:47,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:40:47,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857587857] [2024-06-04 15:40:47,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:40:47,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:40:47,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:40:48,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:40:48,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:40:48,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857587857] [2024-06-04 15:40:48,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857587857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:40:48,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:40:48,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:40:48,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842144846] [2024-06-04 15:40:48,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:40:48,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:40:48,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:40:48,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:40:48,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:40:48,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:40:48,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 620 transitions, 8548 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:48,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:40:48,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:40:48,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:40:50,224 INFO L124 PetriNetUnfolderBase]: 3762/5801 cut-off events. [2024-06-04 15:40:50,224 INFO L125 PetriNetUnfolderBase]: For 522676/522678 co-relation queries the response was YES. [2024-06-04 15:40:50,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48402 conditions, 5801 events. 3762/5801 cut-off events. For 522676/522678 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 33305 event pairs, 698 based on Foata normal form. 2/5801 useless extension candidates. Maximal degree in co-relation 48211. Up to 5589 conditions per place. [2024-06-04 15:40:50,316 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 602 selfloop transitions, 37 changer transitions 0/643 dead transitions. [2024-06-04 15:40:50,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 643 transitions, 9965 flow [2024-06-04 15:40:50,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:40:50,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:40:50,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 175 transitions. [2024-06-04 15:40:50,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38802660753880264 [2024-06-04 15:40:50,317 INFO L175 Difference]: Start difference. First operand has 429 places, 620 transitions, 8548 flow. Second operand 11 states and 175 transitions. [2024-06-04 15:40:50,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 643 transitions, 9965 flow [2024-06-04 15:40:53,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 643 transitions, 9871 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-04 15:40:53,032 INFO L231 Difference]: Finished difference. Result has 434 places, 622 transitions, 8584 flow [2024-06-04 15:40:53,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8454, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8584, PETRI_PLACES=434, PETRI_TRANSITIONS=622} [2024-06-04 15:40:53,032 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 392 predicate places. [2024-06-04 15:40:53,033 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 622 transitions, 8584 flow [2024-06-04 15:40:53,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:53,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:40:53,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:40:53,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-04 15:40:53,033 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:40:53,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:40:53,034 INFO L85 PathProgramCache]: Analyzing trace with hash -46832845, now seen corresponding path program 2 times [2024-06-04 15:40:53,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:40:53,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132249979] [2024-06-04 15:40:53,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:40:53,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:40:53,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:40:54,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:40:54,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:40:54,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132249979] [2024-06-04 15:40:54,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132249979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:40:54,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:40:54,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:40:54,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352577930] [2024-06-04 15:40:54,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:40:54,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:40:54,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:40:54,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:40:54,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:40:54,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:40:54,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 622 transitions, 8584 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:54,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:40:54,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:40:54,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:40:55,775 INFO L124 PetriNetUnfolderBase]: 3783/5832 cut-off events. [2024-06-04 15:40:55,775 INFO L125 PetriNetUnfolderBase]: For 541412/541414 co-relation queries the response was YES. [2024-06-04 15:40:55,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49053 conditions, 5832 events. 3783/5832 cut-off events. For 541412/541414 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 33526 event pairs, 703 based on Foata normal form. 2/5832 useless extension candidates. Maximal degree in co-relation 48860. Up to 5597 conditions per place. [2024-06-04 15:40:55,869 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 601 selfloop transitions, 43 changer transitions 0/648 dead transitions. [2024-06-04 15:40:55,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 648 transitions, 10231 flow [2024-06-04 15:40:55,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:40:55,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:40:55,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2024-06-04 15:40:55,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-04 15:40:55,870 INFO L175 Difference]: Start difference. First operand has 434 places, 622 transitions, 8584 flow. Second operand 11 states and 176 transitions. [2024-06-04 15:40:55,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 648 transitions, 10231 flow [2024-06-04 15:40:58,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 648 transitions, 10120 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-04 15:40:58,910 INFO L231 Difference]: Finished difference. Result has 437 places, 626 transitions, 8670 flow [2024-06-04 15:40:58,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8473, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8670, PETRI_PLACES=437, PETRI_TRANSITIONS=626} [2024-06-04 15:40:58,910 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 395 predicate places. [2024-06-04 15:40:58,910 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 626 transitions, 8670 flow [2024-06-04 15:40:58,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:58,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:40:58,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:40:58,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-04 15:40:58,911 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:40:58,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:40:58,911 INFO L85 PathProgramCache]: Analyzing trace with hash -52404475, now seen corresponding path program 3 times [2024-06-04 15:40:58,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:40:58,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23970944] [2024-06-04 15:40:58,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:40:58,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:40:58,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:40:59,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:40:59,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:40:59,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23970944] [2024-06-04 15:40:59,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23970944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:40:59,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:40:59,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:40:59,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889494802] [2024-06-04 15:40:59,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:40:59,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:40:59,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:40:59,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:40:59,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:40:59,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:40:59,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 626 transitions, 8670 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:59,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:40:59,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:40:59,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:01,388 INFO L124 PetriNetUnfolderBase]: 3778/5825 cut-off events. [2024-06-04 15:41:01,389 INFO L125 PetriNetUnfolderBase]: For 543866/543868 co-relation queries the response was YES. [2024-06-04 15:41:01,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49061 conditions, 5825 events. 3778/5825 cut-off events. For 543866/543868 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 33435 event pairs, 706 based on Foata normal form. 2/5825 useless extension candidates. Maximal degree in co-relation 48866. Up to 5613 conditions per place. [2024-06-04 15:41:01,482 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 605 selfloop transitions, 36 changer transitions 0/645 dead transitions. [2024-06-04 15:41:01,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 645 transitions, 10040 flow [2024-06-04 15:41:01,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:41:01,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:41:01,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-04 15:41:01,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-04 15:41:01,483 INFO L175 Difference]: Start difference. First operand has 437 places, 626 transitions, 8670 flow. Second operand 9 states and 151 transitions. [2024-06-04 15:41:01,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 645 transitions, 10040 flow [2024-06-04 15:41:04,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 645 transitions, 9922 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-04 15:41:04,431 INFO L231 Difference]: Finished difference. Result has 439 places, 626 transitions, 8629 flow [2024-06-04 15:41:04,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8552, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=590, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8629, PETRI_PLACES=439, PETRI_TRANSITIONS=626} [2024-06-04 15:41:04,432 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 397 predicate places. [2024-06-04 15:41:04,432 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 626 transitions, 8629 flow [2024-06-04 15:41:04,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:04,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:04,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:41:04,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-04 15:41:04,433 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:41:04,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:04,433 INFO L85 PathProgramCache]: Analyzing trace with hash -52554577, now seen corresponding path program 6 times [2024-06-04 15:41:04,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:04,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15491462] [2024-06-04 15:41:04,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:04,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:04,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:05,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:05,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:05,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15491462] [2024-06-04 15:41:05,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15491462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:05,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:05,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:41:05,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877117894] [2024-06-04 15:41:05,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:05,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:41:05,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:05,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:41:05,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:41:05,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:41:05,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 626 transitions, 8629 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:05,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:05,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:41:05,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:07,196 INFO L124 PetriNetUnfolderBase]: 3814/5881 cut-off events. [2024-06-04 15:41:07,200 INFO L125 PetriNetUnfolderBase]: For 590778/590780 co-relation queries the response was YES. [2024-06-04 15:41:07,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49648 conditions, 5881 events. 3814/5881 cut-off events. For 590778/590780 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 33853 event pairs, 704 based on Foata normal form. 10/5889 useless extension candidates. Maximal degree in co-relation 49451. Up to 5592 conditions per place. [2024-06-04 15:41:07,296 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 602 selfloop transitions, 48 changer transitions 0/654 dead transitions. [2024-06-04 15:41:07,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 654 transitions, 10134 flow [2024-06-04 15:41:07,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:41:07,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:41:07,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-04 15:41:07,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4079822616407982 [2024-06-04 15:41:07,297 INFO L175 Difference]: Start difference. First operand has 439 places, 626 transitions, 8629 flow. Second operand 11 states and 184 transitions. [2024-06-04 15:41:07,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 654 transitions, 10134 flow [2024-06-04 15:41:11,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 654 transitions, 10050 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-04 15:41:11,059 INFO L231 Difference]: Finished difference. Result has 442 places, 627 transitions, 8685 flow [2024-06-04 15:41:11,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8545, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8685, PETRI_PLACES=442, PETRI_TRANSITIONS=627} [2024-06-04 15:41:11,060 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 400 predicate places. [2024-06-04 15:41:11,060 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 627 transitions, 8685 flow [2024-06-04 15:41:11,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:11,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:11,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:41:11,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-04 15:41:11,061 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:41:11,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:11,061 INFO L85 PathProgramCache]: Analyzing trace with hash 170109263, now seen corresponding path program 7 times [2024-06-04 15:41:11,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:11,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650054651] [2024-06-04 15:41:11,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:11,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:11,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:11,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:11,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:11,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650054651] [2024-06-04 15:41:11,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650054651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:11,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:11,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:41:11,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798123977] [2024-06-04 15:41:11,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:11,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:41:11,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:11,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:41:11,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:41:12,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:41:12,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 627 transitions, 8685 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:12,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:12,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:41:12,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:13,749 INFO L124 PetriNetUnfolderBase]: 3850/5937 cut-off events. [2024-06-04 15:41:13,750 INFO L125 PetriNetUnfolderBase]: For 605153/605155 co-relation queries the response was YES. [2024-06-04 15:41:13,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50422 conditions, 5937 events. 3850/5937 cut-off events. For 605153/605155 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 34212 event pairs, 721 based on Foata normal form. 10/5945 useless extension candidates. Maximal degree in co-relation 50224. Up to 5675 conditions per place. [2024-06-04 15:41:13,844 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 607 selfloop transitions, 44 changer transitions 0/655 dead transitions. [2024-06-04 15:41:13,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 655 transitions, 10184 flow [2024-06-04 15:41:13,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 15:41:13,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 15:41:13,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 193 transitions. [2024-06-04 15:41:13,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39227642276422764 [2024-06-04 15:41:13,845 INFO L175 Difference]: Start difference. First operand has 442 places, 627 transitions, 8685 flow. Second operand 12 states and 193 transitions. [2024-06-04 15:41:13,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 655 transitions, 10184 flow [2024-06-04 15:41:17,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 655 transitions, 10072 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-04 15:41:17,093 INFO L231 Difference]: Finished difference. Result has 444 places, 628 transitions, 8703 flow [2024-06-04 15:41:17,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8573, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8703, PETRI_PLACES=444, PETRI_TRANSITIONS=628} [2024-06-04 15:41:17,094 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 402 predicate places. [2024-06-04 15:41:17,094 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 628 transitions, 8703 flow [2024-06-04 15:41:17,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:17,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:17,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:41:17,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-04 15:41:17,095 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:41:17,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:17,095 INFO L85 PathProgramCache]: Analyzing trace with hash 164599013, now seen corresponding path program 8 times [2024-06-04 15:41:17,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:17,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477264454] [2024-06-04 15:41:17,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:17,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:17,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:18,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:18,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:18,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477264454] [2024-06-04 15:41:18,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477264454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:18,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:18,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:41:18,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373788943] [2024-06-04 15:41:18,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:18,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:41:18,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:18,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:41:18,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:41:18,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:41:18,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 628 transitions, 8703 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:18,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:18,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:41:18,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:19,755 INFO L124 PetriNetUnfolderBase]: 3911/6032 cut-off events. [2024-06-04 15:41:19,756 INFO L125 PetriNetUnfolderBase]: For 626924/626926 co-relation queries the response was YES. [2024-06-04 15:41:19,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51782 conditions, 6032 events. 3911/6032 cut-off events. For 626924/626926 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 34846 event pairs, 721 based on Foata normal form. 8/6038 useless extension candidates. Maximal degree in co-relation 51584. Up to 5620 conditions per place. [2024-06-04 15:41:19,854 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 605 selfloop transitions, 51 changer transitions 0/660 dead transitions. [2024-06-04 15:41:19,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 660 transitions, 10479 flow [2024-06-04 15:41:19,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:41:19,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:41:19,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-04 15:41:19,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219512195121951 [2024-06-04 15:41:19,855 INFO L175 Difference]: Start difference. First operand has 444 places, 628 transitions, 8703 flow. Second operand 10 states and 173 transitions. [2024-06-04 15:41:19,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 660 transitions, 10479 flow [2024-06-04 15:41:23,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 660 transitions, 10376 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-04 15:41:23,209 INFO L231 Difference]: Finished difference. Result has 446 places, 631 transitions, 8805 flow [2024-06-04 15:41:23,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8600, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8805, PETRI_PLACES=446, PETRI_TRANSITIONS=631} [2024-06-04 15:41:23,210 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 404 predicate places. [2024-06-04 15:41:23,210 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 631 transitions, 8805 flow [2024-06-04 15:41:23,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:23,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:23,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:41:23,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-04 15:41:23,211 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:41:23,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:23,211 INFO L85 PathProgramCache]: Analyzing trace with hash 497406119, now seen corresponding path program 4 times [2024-06-04 15:41:23,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:23,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050085063] [2024-06-04 15:41:23,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:23,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:23,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:24,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:24,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:24,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050085063] [2024-06-04 15:41:24,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050085063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:24,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:24,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:41:24,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128314772] [2024-06-04 15:41:24,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:24,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:41:24,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:24,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:41:24,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:41:24,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:41:24,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 631 transitions, 8805 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:24,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:24,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:41:24,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:25,898 INFO L124 PetriNetUnfolderBase]: 3919/6044 cut-off events. [2024-06-04 15:41:25,898 INFO L125 PetriNetUnfolderBase]: For 612319/612321 co-relation queries the response was YES. [2024-06-04 15:41:25,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52053 conditions, 6044 events. 3919/6044 cut-off events. For 612319/612321 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 34980 event pairs, 788 based on Foata normal form. 2/6044 useless extension candidates. Maximal degree in co-relation 51853. Up to 5868 conditions per place. [2024-06-04 15:41:26,015 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 623 selfloop transitions, 19 changer transitions 0/646 dead transitions. [2024-06-04 15:41:26,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 646 transitions, 10202 flow [2024-06-04 15:41:26,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:41:26,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:41:26,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-04 15:41:26,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-04 15:41:26,016 INFO L175 Difference]: Start difference. First operand has 446 places, 631 transitions, 8805 flow. Second operand 8 states and 128 transitions. [2024-06-04 15:41:26,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 646 transitions, 10202 flow [2024-06-04 15:41:29,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 646 transitions, 10120 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-04 15:41:29,762 INFO L231 Difference]: Finished difference. Result has 448 places, 633 transitions, 8831 flow [2024-06-04 15:41:29,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8723, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=612, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8831, PETRI_PLACES=448, PETRI_TRANSITIONS=633} [2024-06-04 15:41:29,762 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 406 predicate places. [2024-06-04 15:41:29,763 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 633 transitions, 8831 flow [2024-06-04 15:41:29,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:29,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:29,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:41:29,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-04 15:41:29,764 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:41:29,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:29,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1310259261, now seen corresponding path program 5 times [2024-06-04 15:41:29,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:29,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72733412] [2024-06-04 15:41:29,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:29,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:29,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:30,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:30,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:30,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72733412] [2024-06-04 15:41:30,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72733412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:30,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:30,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:41:30,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785055168] [2024-06-04 15:41:30,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:30,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:41:30,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:30,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:41:30,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:41:31,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:41:31,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 633 transitions, 8831 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:31,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:31,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:41:31,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:32,654 INFO L124 PetriNetUnfolderBase]: 3927/6056 cut-off events. [2024-06-04 15:41:32,655 INFO L125 PetriNetUnfolderBase]: For 622246/622248 co-relation queries the response was YES. [2024-06-04 15:41:32,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52207 conditions, 6056 events. 3927/6056 cut-off events. For 622246/622248 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 35086 event pairs, 790 based on Foata normal form. 2/6056 useless extension candidates. Maximal degree in co-relation 52005. Up to 5866 conditions per place. [2024-06-04 15:41:32,754 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 622 selfloop transitions, 22 changer transitions 0/648 dead transitions. [2024-06-04 15:41:32,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 648 transitions, 10207 flow [2024-06-04 15:41:32,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:41:32,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:41:32,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-04 15:41:32,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-04 15:41:32,755 INFO L175 Difference]: Start difference. First operand has 448 places, 633 transitions, 8831 flow. Second operand 8 states and 129 transitions. [2024-06-04 15:41:32,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 648 transitions, 10207 flow [2024-06-04 15:41:36,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 648 transitions, 10118 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-04 15:41:36,899 INFO L231 Difference]: Finished difference. Result has 450 places, 635 transitions, 8841 flow [2024-06-04 15:41:36,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8742, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=611, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8841, PETRI_PLACES=450, PETRI_TRANSITIONS=635} [2024-06-04 15:41:36,900 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 408 predicate places. [2024-06-04 15:41:36,900 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 635 transitions, 8841 flow [2024-06-04 15:41:36,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:36,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:36,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:41:36,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-04 15:41:36,902 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:41:36,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:36,902 INFO L85 PathProgramCache]: Analyzing trace with hash 2022405061, now seen corresponding path program 6 times [2024-06-04 15:41:36,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:36,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469882379] [2024-06-04 15:41:36,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:36,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:36,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:37,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:37,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:37,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469882379] [2024-06-04 15:41:37,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469882379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:37,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:37,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:41:37,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527510439] [2024-06-04 15:41:37,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:37,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:41:37,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:37,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:41:37,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:41:37,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:41:37,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 635 transitions, 8841 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:37,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:37,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:41:37,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:39,528 INFO L124 PetriNetUnfolderBase]: 3935/6068 cut-off events. [2024-06-04 15:41:39,529 INFO L125 PetriNetUnfolderBase]: For 634721/634723 co-relation queries the response was YES. [2024-06-04 15:41:39,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52500 conditions, 6068 events. 3935/6068 cut-off events. For 634721/634723 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 35195 event pairs, 781 based on Foata normal form. 2/6068 useless extension candidates. Maximal degree in co-relation 52297. Up to 5848 conditions per place. [2024-06-04 15:41:39,627 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 616 selfloop transitions, 34 changer transitions 0/654 dead transitions. [2024-06-04 15:41:39,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 654 transitions, 10282 flow [2024-06-04 15:41:39,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:41:39,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:41:39,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-04 15:41:39,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-04 15:41:39,631 INFO L175 Difference]: Start difference. First operand has 450 places, 635 transitions, 8841 flow. Second operand 8 states and 137 transitions. [2024-06-04 15:41:39,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 654 transitions, 10282 flow [2024-06-04 15:41:43,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 654 transitions, 10199 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-04 15:41:43,798 INFO L231 Difference]: Finished difference. Result has 452 places, 637 transitions, 8902 flow [2024-06-04 15:41:43,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8758, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=601, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8902, PETRI_PLACES=452, PETRI_TRANSITIONS=637} [2024-06-04 15:41:43,801 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 410 predicate places. [2024-06-04 15:41:43,801 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 637 transitions, 8902 flow [2024-06-04 15:41:43,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:43,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:43,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:41:43,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-04 15:41:43,803 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:41:43,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:43,803 INFO L85 PathProgramCache]: Analyzing trace with hash 497198357, now seen corresponding path program 9 times [2024-06-04 15:41:43,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:43,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45237405] [2024-06-04 15:41:43,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:43,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:43,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:44,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:44,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:44,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45237405] [2024-06-04 15:41:44,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45237405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:44,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:44,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:41:44,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038556899] [2024-06-04 15:41:44,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:44,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:41:44,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:44,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:41:44,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:41:44,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:41:44,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 637 transitions, 8902 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:44,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:44,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:41:44,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:46,600 INFO L124 PetriNetUnfolderBase]: 3971/6124 cut-off events. [2024-06-04 15:41:46,600 INFO L125 PetriNetUnfolderBase]: For 689557/689559 co-relation queries the response was YES. [2024-06-04 15:41:46,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53344 conditions, 6124 events. 3971/6124 cut-off events. For 689557/689559 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 35600 event pairs, 792 based on Foata normal form. 10/6132 useless extension candidates. Maximal degree in co-relation 53140. Up to 5894 conditions per place. [2024-06-04 15:41:46,697 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 631 selfloop transitions, 22 changer transitions 0/657 dead transitions. [2024-06-04 15:41:46,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 657 transitions, 10373 flow [2024-06-04 15:41:46,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:41:46,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:41:46,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-04 15:41:46,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-04 15:41:46,699 INFO L175 Difference]: Start difference. First operand has 452 places, 637 transitions, 8902 flow. Second operand 9 states and 146 transitions. [2024-06-04 15:41:46,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 657 transitions, 10373 flow [2024-06-04 15:41:50,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 657 transitions, 10272 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-04 15:41:50,747 INFO L231 Difference]: Finished difference. Result has 457 places, 638 transitions, 8897 flow [2024-06-04 15:41:50,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8801, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=615, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8897, PETRI_PLACES=457, PETRI_TRANSITIONS=638} [2024-06-04 15:41:50,748 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 415 predicate places. [2024-06-04 15:41:50,748 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 638 transitions, 8897 flow [2024-06-04 15:41:50,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:50,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:50,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:41:50,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-04 15:41:50,749 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:41:50,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:50,749 INFO L85 PathProgramCache]: Analyzing trace with hash 763110839, now seen corresponding path program 7 times [2024-06-04 15:41:50,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:50,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953997102] [2024-06-04 15:41:50,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:50,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:50,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:51,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:51,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:51,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953997102] [2024-06-04 15:41:51,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953997102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:51,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:51,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:41:51,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531208877] [2024-06-04 15:41:51,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:51,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:41:51,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:51,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:41:51,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:41:51,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:41:51,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 638 transitions, 8897 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:51,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:51,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:41:51,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:53,400 INFO L124 PetriNetUnfolderBase]: 3979/6134 cut-off events. [2024-06-04 15:41:53,401 INFO L125 PetriNetUnfolderBase]: For 664482/664484 co-relation queries the response was YES. [2024-06-04 15:41:53,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53522 conditions, 6134 events. 3979/6134 cut-off events. For 664482/664484 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 35590 event pairs, 794 based on Foata normal form. 2/6134 useless extension candidates. Maximal degree in co-relation 53317. Up to 5955 conditions per place. [2024-06-04 15:41:53,498 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 630 selfloop transitions, 19 changer transitions 0/653 dead transitions. [2024-06-04 15:41:53,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 653 transitions, 10279 flow [2024-06-04 15:41:53,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:41:53,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:41:53,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-04 15:41:53,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-04 15:41:53,500 INFO L175 Difference]: Start difference. First operand has 457 places, 638 transitions, 8897 flow. Second operand 8 states and 127 transitions. [2024-06-04 15:41:53,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 653 transitions, 10279 flow [2024-06-04 15:41:58,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 653 transitions, 10195 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-04 15:41:58,778 INFO L231 Difference]: Finished difference. Result has 457 places, 640 transitions, 8912 flow [2024-06-04 15:41:58,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8813, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8912, PETRI_PLACES=457, PETRI_TRANSITIONS=640} [2024-06-04 15:41:58,784 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 415 predicate places. [2024-06-04 15:41:58,784 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 640 transitions, 8912 flow [2024-06-04 15:41:58,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:58,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:58,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:41:58,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-04 15:41:58,785 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:41:58,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:58,785 INFO L85 PathProgramCache]: Analyzing trace with hash 274931141, now seen corresponding path program 8 times [2024-06-04 15:41:58,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:58,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596884053] [2024-06-04 15:41:58,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:58,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:58,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:59,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:59,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:59,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596884053] [2024-06-04 15:41:59,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596884053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:59,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:59,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:41:59,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544087204] [2024-06-04 15:41:59,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:59,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:41:59,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:59,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:41:59,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:41:59,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:41:59,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 640 transitions, 8912 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:59,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:59,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:41:59,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:01,506 INFO L124 PetriNetUnfolderBase]: 3987/6148 cut-off events. [2024-06-04 15:42:01,507 INFO L125 PetriNetUnfolderBase]: For 673516/673518 co-relation queries the response was YES. [2024-06-04 15:42:01,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53580 conditions, 6148 events. 3987/6148 cut-off events. For 673516/673518 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 35757 event pairs, 791 based on Foata normal form. 2/6148 useless extension candidates. Maximal degree in co-relation 53374. Up to 5905 conditions per place. [2024-06-04 15:42:01,609 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 619 selfloop transitions, 39 changer transitions 0/662 dead transitions. [2024-06-04 15:42:01,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 662 transitions, 10627 flow [2024-06-04 15:42:01,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:42:01,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:42:01,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-04 15:42:01,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-04 15:42:01,610 INFO L175 Difference]: Start difference. First operand has 457 places, 640 transitions, 8912 flow. Second operand 8 states and 138 transitions. [2024-06-04 15:42:01,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 662 transitions, 10627 flow [2024-06-04 15:42:06,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 662 transitions, 10544 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-04 15:42:06,355 INFO L231 Difference]: Finished difference. Result has 460 places, 644 transitions, 9058 flow [2024-06-04 15:42:06,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8829, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=602, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9058, PETRI_PLACES=460, PETRI_TRANSITIONS=644} [2024-06-04 15:42:06,363 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 418 predicate places. [2024-06-04 15:42:06,363 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 644 transitions, 9058 flow [2024-06-04 15:42:06,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:06,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:06,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:06,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-04 15:42:06,364 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:42:06,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:06,364 INFO L85 PathProgramCache]: Analyzing trace with hash 274715939, now seen corresponding path program 10 times [2024-06-04 15:42:06,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:06,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879337649] [2024-06-04 15:42:06,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:06,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:06,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:07,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:07,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:07,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879337649] [2024-06-04 15:42:07,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879337649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:07,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:07,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:42:07,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018040807] [2024-06-04 15:42:07,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:07,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:42:07,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:07,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:42:07,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:42:07,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:42:07,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 644 transitions, 9058 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:07,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:07,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:42:07,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:09,106 INFO L124 PetriNetUnfolderBase]: 4023/6204 cut-off events. [2024-06-04 15:42:09,106 INFO L125 PetriNetUnfolderBase]: For 732651/732653 co-relation queries the response was YES. [2024-06-04 15:42:09,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54535 conditions, 6204 events. 4023/6204 cut-off events. For 732651/732653 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 36184 event pairs, 795 based on Foata normal form. 10/6212 useless extension candidates. Maximal degree in co-relation 54327. Up to 5930 conditions per place. [2024-06-04 15:42:09,204 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 627 selfloop transitions, 37 changer transitions 0/668 dead transitions. [2024-06-04 15:42:09,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 668 transitions, 10577 flow [2024-06-04 15:42:09,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:42:09,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:42:09,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-04 15:42:09,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-04 15:42:09,205 INFO L175 Difference]: Start difference. First operand has 460 places, 644 transitions, 9058 flow. Second operand 9 states and 155 transitions. [2024-06-04 15:42:09,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 668 transitions, 10577 flow [2024-06-04 15:42:13,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 668 transitions, 10453 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-04 15:42:13,797 INFO L231 Difference]: Finished difference. Result has 464 places, 645 transitions, 9064 flow [2024-06-04 15:42:13,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8934, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=607, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9064, PETRI_PLACES=464, PETRI_TRANSITIONS=645} [2024-06-04 15:42:13,798 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 422 predicate places. [2024-06-04 15:42:13,798 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 645 transitions, 9064 flow [2024-06-04 15:42:13,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:13,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:13,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:13,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-04 15:42:13,798 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:42:13,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:13,799 INFO L85 PathProgramCache]: Analyzing trace with hash 753906412, now seen corresponding path program 1 times [2024-06-04 15:42:13,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:13,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713852477] [2024-06-04 15:42:13,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:13,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:13,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:14,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:14,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:14,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713852477] [2024-06-04 15:42:14,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713852477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:14,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:14,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:42:14,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048781177] [2024-06-04 15:42:14,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:14,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:42:14,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:14,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:42:14,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:42:14,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:42:14,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 645 transitions, 9064 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:14,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:14,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:42:14,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:16,699 INFO L124 PetriNetUnfolderBase]: 4020/6200 cut-off events. [2024-06-04 15:42:16,699 INFO L125 PetriNetUnfolderBase]: For 693382/693384 co-relation queries the response was YES. [2024-06-04 15:42:16,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54492 conditions, 6200 events. 4020/6200 cut-off events. For 693382/693384 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 36154 event pairs, 805 based on Foata normal form. 1/6199 useless extension candidates. Maximal degree in co-relation 54283. Up to 6010 conditions per place. [2024-06-04 15:42:16,812 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 623 selfloop transitions, 31 changer transitions 0/658 dead transitions. [2024-06-04 15:42:16,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 658 transitions, 10434 flow [2024-06-04 15:42:16,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:42:16,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:42:16,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-04 15:42:16,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39634146341463417 [2024-06-04 15:42:16,813 INFO L175 Difference]: Start difference. First operand has 464 places, 645 transitions, 9064 flow. Second operand 8 states and 130 transitions. [2024-06-04 15:42:16,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 658 transitions, 10434 flow [2024-06-04 15:42:21,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 658 transitions, 10315 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-04 15:42:21,520 INFO L231 Difference]: Finished difference. Result has 465 places, 645 transitions, 9017 flow [2024-06-04 15:42:21,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8945, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9017, PETRI_PLACES=465, PETRI_TRANSITIONS=645} [2024-06-04 15:42:21,521 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 423 predicate places. [2024-06-04 15:42:21,521 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 645 transitions, 9017 flow [2024-06-04 15:42:21,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:21,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:21,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:21,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-04 15:42:21,522 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:42:21,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:21,522 INFO L85 PathProgramCache]: Analyzing trace with hash 753906629, now seen corresponding path program 9 times [2024-06-04 15:42:21,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:21,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83504246] [2024-06-04 15:42:21,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:21,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:21,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:22,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:22,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:22,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83504246] [2024-06-04 15:42:22,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83504246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:22,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:22,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:42:22,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789563133] [2024-06-04 15:42:22,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:22,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:42:22,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:22,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:42:22,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:42:22,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:42:22,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 645 transitions, 9017 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:22,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:22,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:42:22,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:24,218 INFO L124 PetriNetUnfolderBase]: 4028/6212 cut-off events. [2024-06-04 15:42:24,218 INFO L125 PetriNetUnfolderBase]: For 706709/706711 co-relation queries the response was YES. [2024-06-04 15:42:24,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54397 conditions, 6212 events. 4028/6212 cut-off events. For 706709/706711 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 36164 event pairs, 809 based on Foata normal form. 2/6212 useless extension candidates. Maximal degree in co-relation 54187. Up to 6021 conditions per place. [2024-06-04 15:42:24,326 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 627 selfloop transitions, 29 changer transitions 0/660 dead transitions. [2024-06-04 15:42:24,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 660 transitions, 10441 flow [2024-06-04 15:42:24,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:42:24,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:42:24,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-04 15:42:24,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-04 15:42:24,328 INFO L175 Difference]: Start difference. First operand has 465 places, 645 transitions, 9017 flow. Second operand 8 states and 129 transitions. [2024-06-04 15:42:24,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 660 transitions, 10441 flow [2024-06-04 15:42:28,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 660 transitions, 10238 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-04 15:42:28,112 INFO L231 Difference]: Finished difference. Result has 464 places, 647 transitions, 8944 flow [2024-06-04 15:42:28,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8814, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=616, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8944, PETRI_PLACES=464, PETRI_TRANSITIONS=647} [2024-06-04 15:42:28,113 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 422 predicate places. [2024-06-04 15:42:28,113 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 647 transitions, 8944 flow [2024-06-04 15:42:28,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:28,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:28,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:28,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-04 15:42:28,113 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:42:28,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:28,114 INFO L85 PathProgramCache]: Analyzing trace with hash 2016840871, now seen corresponding path program 10 times [2024-06-04 15:42:28,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:28,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87013385] [2024-06-04 15:42:28,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:28,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:28,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:29,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:29,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:29,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87013385] [2024-06-04 15:42:29,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87013385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:29,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:29,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:42:29,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479290629] [2024-06-04 15:42:29,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:29,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:42:29,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:29,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:42:29,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:42:29,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:42:29,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 647 transitions, 8944 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:29,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:29,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:42:29,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:30,818 INFO L124 PetriNetUnfolderBase]: 4023/6205 cut-off events. [2024-06-04 15:42:30,818 INFO L125 PetriNetUnfolderBase]: For 709380/709382 co-relation queries the response was YES. [2024-06-04 15:42:30,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54059 conditions, 6205 events. 4023/6205 cut-off events. For 709380/709382 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 36210 event pairs, 797 based on Foata normal form. 2/6205 useless extension candidates. Maximal degree in co-relation 53850. Up to 5985 conditions per place. [2024-06-04 15:42:30,920 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 627 selfloop transitions, 36 changer transitions 0/667 dead transitions. [2024-06-04 15:42:30,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 667 transitions, 10354 flow [2024-06-04 15:42:30,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:42:30,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:42:30,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-04 15:42:30,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-04 15:42:30,922 INFO L175 Difference]: Start difference. First operand has 464 places, 647 transitions, 8944 flow. Second operand 8 states and 140 transitions. [2024-06-04 15:42:30,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 667 transitions, 10354 flow [2024-06-04 15:42:35,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 667 transitions, 10214 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-04 15:42:35,604 INFO L231 Difference]: Finished difference. Result has 466 places, 647 transitions, 8881 flow [2024-06-04 15:42:35,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8804, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=611, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8881, PETRI_PLACES=466, PETRI_TRANSITIONS=647} [2024-06-04 15:42:35,605 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 424 predicate places. [2024-06-04 15:42:35,605 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 647 transitions, 8881 flow [2024-06-04 15:42:35,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:35,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:35,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:35,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-04 15:42:35,605 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:42:35,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:35,606 INFO L85 PathProgramCache]: Analyzing trace with hash 753914069, now seen corresponding path program 11 times [2024-06-04 15:42:35,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:35,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286108450] [2024-06-04 15:42:35,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:35,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:35,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:36,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:36,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:36,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286108450] [2024-06-04 15:42:36,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286108450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:36,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:36,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:42:36,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807805782] [2024-06-04 15:42:36,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:36,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:42:36,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:36,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:42:36,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:42:36,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:42:36,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 647 transitions, 8881 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:36,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:36,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:42:36,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:38,344 INFO L124 PetriNetUnfolderBase]: 4018/6198 cut-off events. [2024-06-04 15:42:38,344 INFO L125 PetriNetUnfolderBase]: For 697326/697328 co-relation queries the response was YES. [2024-06-04 15:42:38,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53654 conditions, 6198 events. 4018/6198 cut-off events. For 697326/697328 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 36118 event pairs, 803 based on Foata normal form. 2/6198 useless extension candidates. Maximal degree in co-relation 53444. Up to 5979 conditions per place. [2024-06-04 15:42:38,448 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 623 selfloop transitions, 35 changer transitions 0/662 dead transitions. [2024-06-04 15:42:38,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 662 transitions, 10303 flow [2024-06-04 15:42:38,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:42:38,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:42:38,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-04 15:42:38,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39634146341463417 [2024-06-04 15:42:38,450 INFO L175 Difference]: Start difference. First operand has 466 places, 647 transitions, 8881 flow. Second operand 8 states and 130 transitions. [2024-06-04 15:42:38,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 662 transitions, 10303 flow [2024-06-04 15:42:42,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 662 transitions, 10241 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-04 15:42:42,448 INFO L231 Difference]: Finished difference. Result has 469 places, 649 transitions, 8965 flow [2024-06-04 15:42:42,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8819, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=612, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8965, PETRI_PLACES=469, PETRI_TRANSITIONS=649} [2024-06-04 15:42:42,449 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 427 predicate places. [2024-06-04 15:42:42,449 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 649 transitions, 8965 flow [2024-06-04 15:42:42,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:42,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:42,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:42,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-04 15:42:42,450 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:42:42,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:42,450 INFO L85 PathProgramCache]: Analyzing trace with hash 269205689, now seen corresponding path program 11 times [2024-06-04 15:42:42,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:42,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678927109] [2024-06-04 15:42:42,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:42,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:42,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:43,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:43,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:43,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678927109] [2024-06-04 15:42:43,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678927109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:43,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:43,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:42:43,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534841178] [2024-06-04 15:42:43,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:43,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:42:43,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:43,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:42:43,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:42:43,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:42:43,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 649 transitions, 8965 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:43,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:43,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:42:43,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:45,298 INFO L124 PetriNetUnfolderBase]: 4152/6408 cut-off events. [2024-06-04 15:42:45,298 INFO L125 PetriNetUnfolderBase]: For 819477/819479 co-relation queries the response was YES. [2024-06-04 15:42:45,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57019 conditions, 6408 events. 4152/6408 cut-off events. For 819477/819479 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 37590 event pairs, 809 based on Foata normal form. 8/6414 useless extension candidates. Maximal degree in co-relation 56808. Up to 5889 conditions per place. [2024-06-04 15:42:45,400 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 623 selfloop transitions, 64 changer transitions 0/691 dead transitions. [2024-06-04 15:42:45,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 691 transitions, 10933 flow [2024-06-04 15:42:45,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:42:45,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:42:45,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-04 15:42:45,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-04 15:42:45,402 INFO L175 Difference]: Start difference. First operand has 469 places, 649 transitions, 8965 flow. Second operand 9 states and 170 transitions. [2024-06-04 15:42:45,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 691 transitions, 10933 flow [2024-06-04 15:42:50,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 691 transitions, 10795 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-04 15:42:50,169 INFO L231 Difference]: Finished difference. Result has 472 places, 655 transitions, 9159 flow [2024-06-04 15:42:50,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8831, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9159, PETRI_PLACES=472, PETRI_TRANSITIONS=655} [2024-06-04 15:42:50,169 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 430 predicate places. [2024-06-04 15:42:50,169 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 655 transitions, 9159 flow [2024-06-04 15:42:50,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:50,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:50,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:50,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-04 15:42:50,170 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:42:50,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:50,170 INFO L85 PathProgramCache]: Analyzing trace with hash 2016834919, now seen corresponding path program 12 times [2024-06-04 15:42:50,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:50,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793051744] [2024-06-04 15:42:50,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:50,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:50,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:51,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:51,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:51,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793051744] [2024-06-04 15:42:51,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793051744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:51,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:51,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:42:51,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050023909] [2024-06-04 15:42:51,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:51,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:42:51,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:51,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:42:51,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:42:51,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:42:51,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 655 transitions, 9159 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:51,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:51,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:42:51,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:53,032 INFO L124 PetriNetUnfolderBase]: 4185/6459 cut-off events. [2024-06-04 15:42:53,033 INFO L125 PetriNetUnfolderBase]: For 835965/835967 co-relation queries the response was YES. [2024-06-04 15:42:53,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57204 conditions, 6459 events. 4185/6459 cut-off events. For 835965/835967 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 37990 event pairs, 837 based on Foata normal form. 16/6473 useless extension candidates. Maximal degree in co-relation 56991. Up to 6165 conditions per place. [2024-06-04 15:42:53,145 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 641 selfloop transitions, 40 changer transitions 0/685 dead transitions. [2024-06-04 15:42:53,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 685 transitions, 10764 flow [2024-06-04 15:42:53,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:42:53,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:42:53,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-04 15:42:53,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-04 15:42:53,146 INFO L175 Difference]: Start difference. First operand has 472 places, 655 transitions, 9159 flow. Second operand 9 states and 158 transitions. [2024-06-04 15:42:53,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 685 transitions, 10764 flow [2024-06-04 15:42:57,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 685 transitions, 10630 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-04 15:42:57,912 INFO L231 Difference]: Finished difference. Result has 477 places, 659 transitions, 9214 flow [2024-06-04 15:42:57,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9038, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=615, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9214, PETRI_PLACES=477, PETRI_TRANSITIONS=659} [2024-06-04 15:42:57,922 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 435 predicate places. [2024-06-04 15:42:57,922 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 659 transitions, 9214 flow [2024-06-04 15:42:57,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:57,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:57,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:57,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-04 15:42:57,923 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:42:57,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:57,923 INFO L85 PathProgramCache]: Analyzing trace with hash 2016690769, now seen corresponding path program 13 times [2024-06-04 15:42:57,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:57,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232265551] [2024-06-04 15:42:57,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:57,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:57,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:58,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:58,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:58,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232265551] [2024-06-04 15:42:58,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232265551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:58,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:58,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:42:58,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388497263] [2024-06-04 15:42:58,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:58,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:42:58,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:58,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:42:58,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:42:58,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:42:58,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 659 transitions, 9214 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:58,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:58,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:42:58,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:00,750 INFO L124 PetriNetUnfolderBase]: 4162/6426 cut-off events. [2024-06-04 15:43:00,750 INFO L125 PetriNetUnfolderBase]: For 750154/750156 co-relation queries the response was YES. [2024-06-04 15:43:00,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55497 conditions, 6426 events. 4162/6426 cut-off events. For 750154/750156 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 37762 event pairs, 821 based on Foata normal form. 10/6434 useless extension candidates. Maximal degree in co-relation 55281. Up to 6116 conditions per place. [2024-06-04 15:43:00,860 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 623 selfloop transitions, 62 changer transitions 0/689 dead transitions. [2024-06-04 15:43:00,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 689 transitions, 10792 flow [2024-06-04 15:43:00,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:43:00,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:43:00,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-04 15:43:00,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-04 15:43:00,862 INFO L175 Difference]: Start difference. First operand has 477 places, 659 transitions, 9214 flow. Second operand 9 states and 163 transitions. [2024-06-04 15:43:00,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 689 transitions, 10792 flow [2024-06-04 15:43:05,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 689 transitions, 10512 flow, removed 31 selfloop flow, removed 10 redundant places. [2024-06-04 15:43:05,071 INFO L231 Difference]: Finished difference. Result has 476 places, 660 transitions, 9109 flow [2024-06-04 15:43:05,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8934, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=597, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9109, PETRI_PLACES=476, PETRI_TRANSITIONS=660} [2024-06-04 15:43:05,072 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 434 predicate places. [2024-06-04 15:43:05,072 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 660 transitions, 9109 flow [2024-06-04 15:43:05,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:05,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:05,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:05,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-04 15:43:05,072 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:43:05,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:05,073 INFO L85 PathProgramCache]: Analyzing trace with hash -390719199, now seen corresponding path program 1 times [2024-06-04 15:43:05,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:05,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031503150] [2024-06-04 15:43:05,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:05,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:05,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:06,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:06,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:06,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031503150] [2024-06-04 15:43:06,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031503150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:06,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:06,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:43:06,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171236925] [2024-06-04 15:43:06,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:06,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:43:06,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:06,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:43:06,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:43:06,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:43:06,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 660 transitions, 9109 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:06,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:06,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:43:06,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:07,936 INFO L124 PetriNetUnfolderBase]: 4188/6465 cut-off events. [2024-06-04 15:43:07,936 INFO L125 PetriNetUnfolderBase]: For 712116/712118 co-relation queries the response was YES. [2024-06-04 15:43:08,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55251 conditions, 6465 events. 4188/6465 cut-off events. For 712116/712118 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 37975 event pairs, 667 based on Foata normal form. 2/6458 useless extension candidates. Maximal degree in co-relation 55038. Up to 5723 conditions per place. [2024-06-04 15:43:08,049 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 514 selfloop transitions, 177 changer transitions 0/695 dead transitions. [2024-06-04 15:43:08,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 695 transitions, 11105 flow [2024-06-04 15:43:08,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:43:08,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:43:08,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-04 15:43:08,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-04 15:43:08,051 INFO L175 Difference]: Start difference. First operand has 476 places, 660 transitions, 9109 flow. Second operand 9 states and 165 transitions. [2024-06-04 15:43:08,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 695 transitions, 11105 flow [2024-06-04 15:43:13,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 695 transitions, 10942 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-04 15:43:13,235 INFO L231 Difference]: Finished difference. Result has 477 places, 666 transitions, 9521 flow [2024-06-04 15:43:13,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8946, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9521, PETRI_PLACES=477, PETRI_TRANSITIONS=666} [2024-06-04 15:43:13,235 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 435 predicate places. [2024-06-04 15:43:13,236 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 666 transitions, 9521 flow [2024-06-04 15:43:13,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:13,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:13,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:13,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-04 15:43:13,236 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:43:13,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:13,237 INFO L85 PathProgramCache]: Analyzing trace with hash -40448431, now seen corresponding path program 2 times [2024-06-04 15:43:13,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:13,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051303957] [2024-06-04 15:43:13,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:13,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:13,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:14,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:14,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:14,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051303957] [2024-06-04 15:43:14,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051303957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:14,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:14,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:43:14,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932169359] [2024-06-04 15:43:14,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:14,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:43:14,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:14,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:43:14,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:43:14,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:43:14,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 666 transitions, 9521 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:14,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:14,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:43:14,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:16,231 INFO L124 PetriNetUnfolderBase]: 4214/6502 cut-off events. [2024-06-04 15:43:16,231 INFO L125 PetriNetUnfolderBase]: For 740603/740605 co-relation queries the response was YES. [2024-06-04 15:43:16,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56581 conditions, 6502 events. 4214/6502 cut-off events. For 740603/740605 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 38242 event pairs, 685 based on Foata normal form. 2/6495 useless extension candidates. Maximal degree in co-relation 56368. Up to 5975 conditions per place. [2024-06-04 15:43:16,345 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 571 selfloop transitions, 124 changer transitions 0/699 dead transitions. [2024-06-04 15:43:16,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 699 transitions, 11554 flow [2024-06-04 15:43:16,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:43:16,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:43:16,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-04 15:43:16,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-04 15:43:16,346 INFO L175 Difference]: Start difference. First operand has 477 places, 666 transitions, 9521 flow. Second operand 9 states and 163 transitions. [2024-06-04 15:43:16,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 699 transitions, 11554 flow [2024-06-04 15:43:21,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 699 transitions, 11290 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-04 15:43:21,039 INFO L231 Difference]: Finished difference. Result has 480 places, 672 transitions, 9740 flow [2024-06-04 15:43:21,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9279, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9740, PETRI_PLACES=480, PETRI_TRANSITIONS=672} [2024-06-04 15:43:21,040 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 438 predicate places. [2024-06-04 15:43:21,040 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 672 transitions, 9740 flow [2024-06-04 15:43:21,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:21,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:21,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:21,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-04 15:43:21,041 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:43:21,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:21,041 INFO L85 PathProgramCache]: Analyzing trace with hash -40442851, now seen corresponding path program 3 times [2024-06-04 15:43:21,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:21,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498721100] [2024-06-04 15:43:21,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:21,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:21,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:22,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:22,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:22,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498721100] [2024-06-04 15:43:22,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498721100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:22,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:22,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:43:22,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109061407] [2024-06-04 15:43:22,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:22,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:43:22,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:22,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:43:22,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:43:22,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:43:22,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 672 transitions, 9740 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:22,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:22,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:43:22,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:24,206 INFO L124 PetriNetUnfolderBase]: 4208/6492 cut-off events. [2024-06-04 15:43:24,207 INFO L125 PetriNetUnfolderBase]: For 728272/728274 co-relation queries the response was YES. [2024-06-04 15:43:24,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56429 conditions, 6492 events. 4208/6492 cut-off events. For 728272/728274 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 38128 event pairs, 681 based on Foata normal form. 2/6485 useless extension candidates. Maximal degree in co-relation 56215. Up to 5970 conditions per place. [2024-06-04 15:43:24,332 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 568 selfloop transitions, 128 changer transitions 0/700 dead transitions. [2024-06-04 15:43:24,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 700 transitions, 11349 flow [2024-06-04 15:43:24,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:43:24,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:43:24,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 190 transitions. [2024-06-04 15:43:24,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4212860310421286 [2024-06-04 15:43:24,333 INFO L175 Difference]: Start difference. First operand has 480 places, 672 transitions, 9740 flow. Second operand 11 states and 190 transitions. [2024-06-04 15:43:24,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 700 transitions, 11349 flow [2024-06-04 15:43:29,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 700 transitions, 11156 flow, removed 59 selfloop flow, removed 5 redundant places. [2024-06-04 15:43:29,636 INFO L231 Difference]: Finished difference. Result has 486 places, 672 transitions, 9817 flow [2024-06-04 15:43:29,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9547, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9817, PETRI_PLACES=486, PETRI_TRANSITIONS=672} [2024-06-04 15:43:29,636 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 444 predicate places. [2024-06-04 15:43:29,636 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 672 transitions, 9817 flow [2024-06-04 15:43:29,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:29,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:29,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:29,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-04 15:43:29,637 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:43:29,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:29,637 INFO L85 PathProgramCache]: Analyzing trace with hash 243268723, now seen corresponding path program 4 times [2024-06-04 15:43:29,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:29,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718522892] [2024-06-04 15:43:29,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:29,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:29,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:30,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:30,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:30,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718522892] [2024-06-04 15:43:30,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718522892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:30,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:30,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:43:30,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042284712] [2024-06-04 15:43:30,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:30,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:43:30,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:30,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:43:30,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:43:30,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:43:30,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 672 transitions, 9817 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:30,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:30,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:43:30,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:32,573 INFO L124 PetriNetUnfolderBase]: 4218/6512 cut-off events. [2024-06-04 15:43:32,573 INFO L125 PetriNetUnfolderBase]: For 728670/728672 co-relation queries the response was YES. [2024-06-04 15:43:32,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56840 conditions, 6512 events. 4218/6512 cut-off events. For 728670/728672 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 38392 event pairs, 733 based on Foata normal form. 2/6505 useless extension candidates. Maximal degree in co-relation 56625. Up to 5929 conditions per place. [2024-06-04 15:43:32,693 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 562 selfloop transitions, 136 changer transitions 0/702 dead transitions. [2024-06-04 15:43:32,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 702 transitions, 11722 flow [2024-06-04 15:43:32,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:43:32,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:43:32,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-04 15:43:32,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-04 15:43:32,694 INFO L175 Difference]: Start difference. First operand has 486 places, 672 transitions, 9817 flow. Second operand 8 states and 150 transitions. [2024-06-04 15:43:32,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 702 transitions, 11722 flow [2024-06-04 15:43:37,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 702 transitions, 11404 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-04 15:43:37,880 INFO L231 Difference]: Finished difference. Result has 482 places, 675 transitions, 9890 flow [2024-06-04 15:43:37,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9501, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9890, PETRI_PLACES=482, PETRI_TRANSITIONS=675} [2024-06-04 15:43:37,884 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 440 predicate places. [2024-06-04 15:43:37,884 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 675 transitions, 9890 flow [2024-06-04 15:43:37,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:37,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:37,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:37,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-04 15:43:37,885 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:43:37,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:37,885 INFO L85 PathProgramCache]: Analyzing trace with hash 84245316, now seen corresponding path program 1 times [2024-06-04 15:43:37,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:37,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304275121] [2024-06-04 15:43:37,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:37,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:37,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:38,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:38,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:38,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304275121] [2024-06-04 15:43:38,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304275121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:38,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:38,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:43:38,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671414148] [2024-06-04 15:43:38,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:38,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:43:38,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:38,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:43:38,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:43:38,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:43:38,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 675 transitions, 9890 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:38,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:38,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:43:38,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:40,740 INFO L124 PetriNetUnfolderBase]: 4223/6513 cut-off events. [2024-06-04 15:43:40,740 INFO L125 PetriNetUnfolderBase]: For 723981/723983 co-relation queries the response was YES. [2024-06-04 15:43:40,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56979 conditions, 6513 events. 4223/6513 cut-off events. For 723981/723983 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 38304 event pairs, 751 based on Foata normal form. 1/6505 useless extension candidates. Maximal degree in co-relation 56764. Up to 6208 conditions per place. [2024-06-04 15:43:40,854 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 624 selfloop transitions, 60 changer transitions 0/688 dead transitions. [2024-06-04 15:43:40,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 688 transitions, 11416 flow [2024-06-04 15:43:40,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:43:40,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:43:40,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-04 15:43:40,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-04 15:43:40,855 INFO L175 Difference]: Start difference. First operand has 482 places, 675 transitions, 9890 flow. Second operand 6 states and 108 transitions. [2024-06-04 15:43:40,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 688 transitions, 11416 flow [2024-06-04 15:43:46,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 688 transitions, 10952 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-04 15:43:46,248 INFO L231 Difference]: Finished difference. Result has 480 places, 678 transitions, 9678 flow [2024-06-04 15:43:46,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9426, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=615, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9678, PETRI_PLACES=480, PETRI_TRANSITIONS=678} [2024-06-04 15:43:46,249 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 438 predicate places. [2024-06-04 15:43:46,249 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 678 transitions, 9678 flow [2024-06-04 15:43:46,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:46,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:46,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:46,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-04 15:43:46,250 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:43:46,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:46,250 INFO L85 PathProgramCache]: Analyzing trace with hash 83978189, now seen corresponding path program 5 times [2024-06-04 15:43:46,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:46,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165148433] [2024-06-04 15:43:46,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:46,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:46,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:47,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:47,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:47,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165148433] [2024-06-04 15:43:47,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165148433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:47,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:47,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:43:47,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18587304] [2024-06-04 15:43:47,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:47,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:43:47,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:47,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:43:47,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:43:47,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:43:47,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 678 transitions, 9678 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:47,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:47,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:43:47,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:49,263 INFO L124 PetriNetUnfolderBase]: 4233/6523 cut-off events. [2024-06-04 15:43:49,264 INFO L125 PetriNetUnfolderBase]: For 728443/728445 co-relation queries the response was YES. [2024-06-04 15:43:49,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56739 conditions, 6523 events. 4233/6523 cut-off events. For 728443/728445 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 38342 event pairs, 747 based on Foata normal form. 2/6516 useless extension candidates. Maximal degree in co-relation 56525. Up to 6209 conditions per place. [2024-06-04 15:43:49,382 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 635 selfloop transitions, 55 changer transitions 0/694 dead transitions. [2024-06-04 15:43:49,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 694 transitions, 11248 flow [2024-06-04 15:43:49,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:43:49,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:43:49,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-04 15:43:49,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-04 15:43:49,383 INFO L175 Difference]: Start difference. First operand has 480 places, 678 transitions, 9678 flow. Second operand 7 states and 123 transitions. [2024-06-04 15:43:49,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 694 transitions, 11248 flow [2024-06-04 15:43:54,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 694 transitions, 11088 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-04 15:43:54,752 INFO L231 Difference]: Finished difference. Result has 482 places, 681 transitions, 9742 flow [2024-06-04 15:43:54,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9518, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=623, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9742, PETRI_PLACES=482, PETRI_TRANSITIONS=681} [2024-06-04 15:43:54,753 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 440 predicate places. [2024-06-04 15:43:54,753 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 681 transitions, 9742 flow [2024-06-04 15:43:54,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:54,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:54,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:54,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-04 15:43:54,753 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:43:54,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:54,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1372422086, now seen corresponding path program 1 times [2024-06-04 15:43:54,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:54,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465390752] [2024-06-04 15:43:54,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:54,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:54,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:55,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:55,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:55,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465390752] [2024-06-04 15:43:55,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465390752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:55,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:55,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:43:55,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326686447] [2024-06-04 15:43:55,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:55,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:43:55,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:55,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:43:55,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:43:55,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:43:55,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 681 transitions, 9742 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:55,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:55,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:43:55,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:57,950 INFO L124 PetriNetUnfolderBase]: 4230/6533 cut-off events. [2024-06-04 15:43:57,950 INFO L125 PetriNetUnfolderBase]: For 718753/718755 co-relation queries the response was YES. [2024-06-04 15:43:58,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56590 conditions, 6533 events. 4230/6533 cut-off events. For 718753/718755 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 38538 event pairs, 775 based on Foata normal form. 1/6525 useless extension candidates. Maximal degree in co-relation 56376. Up to 6039 conditions per place. [2024-06-04 15:43:58,058 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 589 selfloop transitions, 108 changer transitions 0/701 dead transitions. [2024-06-04 15:43:58,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 701 transitions, 11204 flow [2024-06-04 15:43:58,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:43:58,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:43:58,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-04 15:43:58,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-04 15:43:58,059 INFO L175 Difference]: Start difference. First operand has 482 places, 681 transitions, 9742 flow. Second operand 7 states and 133 transitions. [2024-06-04 15:43:58,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 701 transitions, 11204 flow [2024-06-04 15:44:03,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 701 transitions, 11014 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-04 15:44:03,015 INFO L231 Difference]: Finished difference. Result has 485 places, 683 transitions, 9903 flow [2024-06-04 15:44:03,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9552, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9903, PETRI_PLACES=485, PETRI_TRANSITIONS=683} [2024-06-04 15:44:03,016 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 443 predicate places. [2024-06-04 15:44:03,016 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 683 transitions, 9903 flow [2024-06-04 15:44:03,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:03,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:44:03,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:44:03,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-04 15:44:03,017 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:44:03,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:44:03,017 INFO L85 PathProgramCache]: Analyzing trace with hash 282047377, now seen corresponding path program 6 times [2024-06-04 15:44:03,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:44:03,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803818166] [2024-06-04 15:44:03,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:44:03,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:44:03,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:44:04,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:44:04,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:44:04,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803818166] [2024-06-04 15:44:04,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803818166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:44:04,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:44:04,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:44:04,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279346674] [2024-06-04 15:44:04,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:44:04,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:44:04,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:44:04,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:44:04,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:44:04,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:44:04,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 683 transitions, 9903 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:04,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:44:04,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:44:04,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:44:06,015 INFO L124 PetriNetUnfolderBase]: 4224/6539 cut-off events. [2024-06-04 15:44:06,015 INFO L125 PetriNetUnfolderBase]: For 713127/713129 co-relation queries the response was YES. [2024-06-04 15:44:06,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56628 conditions, 6539 events. 4224/6539 cut-off events. For 713127/713129 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 38761 event pairs, 754 based on Foata normal form. 2/6532 useless extension candidates. Maximal degree in co-relation 56412. Up to 5937 conditions per place. [2024-06-04 15:44:06,127 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 571 selfloop transitions, 131 changer transitions 0/706 dead transitions. [2024-06-04 15:44:06,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 706 transitions, 11498 flow [2024-06-04 15:44:06,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:44:06,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:44:06,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-04 15:44:06,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-04 15:44:06,129 INFO L175 Difference]: Start difference. First operand has 485 places, 683 transitions, 9903 flow. Second operand 8 states and 146 transitions. [2024-06-04 15:44:06,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 706 transitions, 11498 flow [2024-06-04 15:44:11,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 706 transitions, 11152 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-04 15:44:11,636 INFO L231 Difference]: Finished difference. Result has 486 places, 683 transitions, 9837 flow [2024-06-04 15:44:11,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9561, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=683, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9837, PETRI_PLACES=486, PETRI_TRANSITIONS=683} [2024-06-04 15:44:11,636 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 444 predicate places. [2024-06-04 15:44:11,637 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 683 transitions, 9837 flow [2024-06-04 15:44:11,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:11,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:44:11,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:44:11,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-04 15:44:11,637 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:44:11,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:44:11,637 INFO L85 PathProgramCache]: Analyzing trace with hash 40075752, now seen corresponding path program 2 times [2024-06-04 15:44:11,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:44:11,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843653487] [2024-06-04 15:44:11,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:44:11,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:44:11,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:44:12,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:44:12,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:44:12,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843653487] [2024-06-04 15:44:12,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843653487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:44:12,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:44:12,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:44:12,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196214357] [2024-06-04 15:44:12,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:44:12,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:44:12,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:44:12,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:44:12,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:44:12,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:44:12,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 683 transitions, 9837 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:12,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:44:12,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:44:12,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:44:14,848 INFO L124 PetriNetUnfolderBase]: 4289/6629 cut-off events. [2024-06-04 15:44:14,849 INFO L125 PetriNetUnfolderBase]: For 720183/720192 co-relation queries the response was YES. [2024-06-04 15:44:14,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57366 conditions, 6629 events. 4289/6629 cut-off events. For 720183/720192 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 39307 event pairs, 760 based on Foata normal form. 7/6631 useless extension candidates. Maximal degree in co-relation 57149. Up to 5958 conditions per place. [2024-06-04 15:44:14,976 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 541 selfloop transitions, 211 changer transitions 0/756 dead transitions. [2024-06-04 15:44:14,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 756 transitions, 12235 flow [2024-06-04 15:44:14,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:44:14,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:44:14,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 193 transitions. [2024-06-04 15:44:14,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4279379157427938 [2024-06-04 15:44:14,978 INFO L175 Difference]: Start difference. First operand has 486 places, 683 transitions, 9837 flow. Second operand 11 states and 193 transitions. [2024-06-04 15:44:14,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 756 transitions, 12235 flow [2024-06-04 15:44:20,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 756 transitions, 12051 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-04 15:44:20,238 INFO L231 Difference]: Finished difference. Result has 493 places, 725 transitions, 10759 flow [2024-06-04 15:44:20,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9663, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=683, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10759, PETRI_PLACES=493, PETRI_TRANSITIONS=725} [2024-06-04 15:44:20,239 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 451 predicate places. [2024-06-04 15:44:20,239 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 725 transitions, 10759 flow [2024-06-04 15:44:20,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:20,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:44:20,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:44:20,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-04 15:44:20,239 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:44:20,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:44:20,240 INFO L85 PathProgramCache]: Analyzing trace with hash -126273110, now seen corresponding path program 1 times [2024-06-04 15:44:20,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:44:20,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605683621] [2024-06-04 15:44:20,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:44:20,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:44:20,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:44:21,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:44:21,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:44:21,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605683621] [2024-06-04 15:44:21,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605683621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:44:21,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:44:21,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:44:21,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822232763] [2024-06-04 15:44:21,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:44:21,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:44:21,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:44:21,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:44:21,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:44:21,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:44:21,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 725 transitions, 10759 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:21,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:44:21,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:44:21,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:44:23,482 INFO L124 PetriNetUnfolderBase]: 4403/6795 cut-off events. [2024-06-04 15:44:23,483 INFO L125 PetriNetUnfolderBase]: For 754146/754155 co-relation queries the response was YES. [2024-06-04 15:44:23,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59583 conditions, 6795 events. 4403/6795 cut-off events. For 754146/754155 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 40358 event pairs, 661 based on Foata normal form. 10/6800 useless extension candidates. Maximal degree in co-relation 59365. Up to 5987 conditions per place. [2024-06-04 15:44:23,592 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 597 selfloop transitions, 203 changer transitions 0/804 dead transitions. [2024-06-04 15:44:23,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 804 transitions, 13532 flow [2024-06-04 15:44:23,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 15:44:23,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 15:44:23,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 215 transitions. [2024-06-04 15:44:23,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4369918699186992 [2024-06-04 15:44:23,593 INFO L175 Difference]: Start difference. First operand has 493 places, 725 transitions, 10759 flow. Second operand 12 states and 215 transitions. [2024-06-04 15:44:23,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 804 transitions, 13532 flow [2024-06-04 15:44:28,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 804 transitions, 13308 flow, removed 81 selfloop flow, removed 3 redundant places. [2024-06-04 15:44:28,991 INFO L231 Difference]: Finished difference. Result has 504 places, 759 transitions, 11728 flow [2024-06-04 15:44:28,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10535, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=725, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11728, PETRI_PLACES=504, PETRI_TRANSITIONS=759} [2024-06-04 15:44:28,991 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 462 predicate places. [2024-06-04 15:44:28,991 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 759 transitions, 11728 flow [2024-06-04 15:44:28,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:28,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:44:28,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:44:28,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-04 15:44:28,992 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:44:28,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:44:28,992 INFO L85 PathProgramCache]: Analyzing trace with hash 40374282, now seen corresponding path program 3 times [2024-06-04 15:44:28,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:44:28,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894114126] [2024-06-04 15:44:28,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:44:28,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:44:29,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:44:30,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:44:30,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:44:30,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894114126] [2024-06-04 15:44:30,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894114126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:44:30,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:44:30,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:44:30,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940231640] [2024-06-04 15:44:30,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:44:30,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:44:30,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:44:30,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:44:30,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:44:30,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:44:30,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 759 transitions, 11728 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:30,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:44:30,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:44:30,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:44:31,969 INFO L124 PetriNetUnfolderBase]: 4413/6804 cut-off events. [2024-06-04 15:44:31,969 INFO L125 PetriNetUnfolderBase]: For 758854/758856 co-relation queries the response was YES. [2024-06-04 15:44:32,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61482 conditions, 6804 events. 4413/6804 cut-off events. For 758854/758856 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 40415 event pairs, 775 based on Foata normal form. 1/6796 useless extension candidates. Maximal degree in co-relation 61260. Up to 5908 conditions per place. [2024-06-04 15:44:32,090 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 495 selfloop transitions, 287 changer transitions 0/786 dead transitions. [2024-06-04 15:44:32,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 786 transitions, 13649 flow [2024-06-04 15:44:32,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:44:32,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:44:32,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-04 15:44:32,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-04 15:44:32,091 INFO L175 Difference]: Start difference. First operand has 504 places, 759 transitions, 11728 flow. Second operand 9 states and 162 transitions. [2024-06-04 15:44:32,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 786 transitions, 13649 flow [2024-06-04 15:44:37,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 786 transitions, 13337 flow, removed 68 selfloop flow, removed 9 redundant places. [2024-06-04 15:44:37,033 INFO L231 Difference]: Finished difference. Result has 504 places, 765 transitions, 12080 flow [2024-06-04 15:44:37,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11420, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=759, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=281, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12080, PETRI_PLACES=504, PETRI_TRANSITIONS=765} [2024-06-04 15:44:37,034 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 462 predicate places. [2024-06-04 15:44:37,034 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 765 transitions, 12080 flow [2024-06-04 15:44:37,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:37,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:44:37,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:44:37,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-04 15:44:37,034 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:44:37,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:44:37,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1567433640, now seen corresponding path program 4 times [2024-06-04 15:44:37,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:44:37,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470652808] [2024-06-04 15:44:37,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:44:37,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:44:37,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:44:37,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:44:37,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:44:37,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470652808] [2024-06-04 15:44:37,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470652808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:44:37,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:44:37,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:44:37,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226614068] [2024-06-04 15:44:37,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:44:37,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:44:37,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:44:37,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:44:37,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:44:38,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:44:38,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 765 transitions, 12080 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:38,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:44:38,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:44:38,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:44:39,930 INFO L124 PetriNetUnfolderBase]: 4418/6813 cut-off events. [2024-06-04 15:44:39,930 INFO L125 PetriNetUnfolderBase]: For 746170/746172 co-relation queries the response was YES. [2024-06-04 15:44:40,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61776 conditions, 6813 events. 4418/6813 cut-off events. For 746170/746172 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 40395 event pairs, 777 based on Foata normal form. 1/6805 useless extension candidates. Maximal degree in co-relation 61554. Up to 6126 conditions per place. [2024-06-04 15:44:40,062 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 550 selfloop transitions, 232 changer transitions 0/786 dead transitions. [2024-06-04 15:44:40,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 786 transitions, 13767 flow [2024-06-04 15:44:40,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:44:40,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:44:40,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-04 15:44:40,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-04 15:44:40,064 INFO L175 Difference]: Start difference. First operand has 504 places, 765 transitions, 12080 flow. Second operand 9 states and 157 transitions. [2024-06-04 15:44:40,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 786 transitions, 13767 flow [2024-06-04 15:44:45,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 786 transitions, 13253 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-04 15:44:45,172 INFO L231 Difference]: Finished difference. Result has 507 places, 768 transitions, 12107 flow [2024-06-04 15:44:45,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11569, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=765, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12107, PETRI_PLACES=507, PETRI_TRANSITIONS=768} [2024-06-04 15:44:45,173 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 465 predicate places. [2024-06-04 15:44:45,173 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 768 transitions, 12107 flow [2024-06-04 15:44:45,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:45,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:44:45,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:44:45,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-04 15:44:45,173 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:44:45,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:44:45,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1451957524, now seen corresponding path program 1 times [2024-06-04 15:44:45,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:44:45,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059798545] [2024-06-04 15:44:45,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:44:45,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:44:45,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:44:46,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:44:46,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:44:46,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059798545] [2024-06-04 15:44:46,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059798545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:44:46,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:44:46,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:44:46,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399866158] [2024-06-04 15:44:46,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:44:46,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:44:46,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:44:46,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:44:46,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:44:46,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:44:46,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 768 transitions, 12107 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:46,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:44:46,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:44:46,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:44:48,431 INFO L124 PetriNetUnfolderBase]: 4462/6873 cut-off events. [2024-06-04 15:44:48,431 INFO L125 PetriNetUnfolderBase]: For 824828/824830 co-relation queries the response was YES. [2024-06-04 15:44:48,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62489 conditions, 6873 events. 4462/6873 cut-off events. For 824828/824830 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 40758 event pairs, 681 based on Foata normal form. 12/6876 useless extension candidates. Maximal degree in co-relation 62267. Up to 6347 conditions per place. [2024-06-04 15:44:48,541 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 690 selfloop transitions, 102 changer transitions 0/796 dead transitions. [2024-06-04 15:44:48,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 796 transitions, 13989 flow [2024-06-04 15:44:48,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:44:48,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:44:48,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-04 15:44:48,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-04 15:44:48,542 INFO L175 Difference]: Start difference. First operand has 507 places, 768 transitions, 12107 flow. Second operand 9 states and 161 transitions. [2024-06-04 15:44:48,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 796 transitions, 13989 flow [2024-06-04 15:44:53,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 796 transitions, 13516 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-04 15:44:53,201 INFO L231 Difference]: Finished difference. Result has 510 places, 769 transitions, 11880 flow [2024-06-04 15:44:53,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11634, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=768, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=666, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11880, PETRI_PLACES=510, PETRI_TRANSITIONS=769} [2024-06-04 15:44:53,201 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 468 predicate places. [2024-06-04 15:44:53,201 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 769 transitions, 11880 flow [2024-06-04 15:44:53,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:53,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:44:53,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:44:53,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-04 15:44:53,202 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:44:53,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:44:53,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1452142470, now seen corresponding path program 5 times [2024-06-04 15:44:53,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:44:53,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283728920] [2024-06-04 15:44:53,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:44:53,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:44:53,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:44:54,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:44:54,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:44:54,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283728920] [2024-06-04 15:44:54,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283728920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:44:54,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:44:54,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:44:54,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713758342] [2024-06-04 15:44:54,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:44:54,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:44:54,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:44:54,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:44:54,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:44:54,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:44:54,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 769 transitions, 11880 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:54,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:44:54,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:44:54,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:44:56,486 INFO L124 PetriNetUnfolderBase]: 4467/6895 cut-off events. [2024-06-04 15:44:56,486 INFO L125 PetriNetUnfolderBase]: For 773350/773359 co-relation queries the response was YES. [2024-06-04 15:44:56,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62501 conditions, 6895 events. 4467/6895 cut-off events. For 773350/773359 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 41128 event pairs, 777 based on Foata normal form. 7/6897 useless extension candidates. Maximal degree in co-relation 62278. Up to 6508 conditions per place. [2024-06-04 15:44:56,607 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 680 selfloop transitions, 106 changer transitions 0/790 dead transitions. [2024-06-04 15:44:56,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 790 transitions, 13587 flow [2024-06-04 15:44:56,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:44:56,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:44:56,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-04 15:44:56,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-04 15:44:56,608 INFO L175 Difference]: Start difference. First operand has 510 places, 769 transitions, 11880 flow. Second operand 10 states and 165 transitions. [2024-06-04 15:44:56,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 790 transitions, 13587 flow [2024-06-04 15:45:01,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 790 transitions, 13383 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-04 15:45:01,662 INFO L231 Difference]: Finished difference. Result has 514 places, 773 transitions, 12008 flow [2024-06-04 15:45:01,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11676, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=769, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=663, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12008, PETRI_PLACES=514, PETRI_TRANSITIONS=773} [2024-06-04 15:45:01,663 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 472 predicate places. [2024-06-04 15:45:01,663 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 773 transitions, 12008 flow [2024-06-04 15:45:01,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:45:01,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:45:01,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:45:01,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-04 15:45:01,663 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:45:01,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:45:01,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1451964468, now seen corresponding path program 2 times [2024-06-04 15:45:01,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:45:01,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832652677] [2024-06-04 15:45:01,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:45:01,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:45:01,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:45:02,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:45:02,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:45:02,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832652677] [2024-06-04 15:45:02,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832652677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:45:02,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:45:02,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:45:02,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354242810] [2024-06-04 15:45:02,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:45:02,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:45:02,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:45:02,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:45:02,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:45:02,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:45:02,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 773 transitions, 12008 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:45:02,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:45:02,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:45:02,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:45:05,035 INFO L124 PetriNetUnfolderBase]: 4487/6923 cut-off events. [2024-06-04 15:45:05,036 INFO L125 PetriNetUnfolderBase]: For 803991/804000 co-relation queries the response was YES. [2024-06-04 15:45:05,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62789 conditions, 6923 events. 4487/6923 cut-off events. For 803991/804000 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 41308 event pairs, 691 based on Foata normal form. 10/6928 useless extension candidates. Maximal degree in co-relation 62564. Up to 6486 conditions per place. [2024-06-04 15:45:05,183 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 713 selfloop transitions, 92 changer transitions 0/809 dead transitions. [2024-06-04 15:45:05,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 809 transitions, 13987 flow [2024-06-04 15:45:05,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 15:45:05,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 15:45:05,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 204 transitions. [2024-06-04 15:45:05,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-04 15:45:05,184 INFO L175 Difference]: Start difference. First operand has 514 places, 773 transitions, 12008 flow. Second operand 12 states and 204 transitions. [2024-06-04 15:45:05,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 809 transitions, 13987 flow [2024-06-04 15:45:11,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 809 transitions, 13784 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-04 15:45:11,467 INFO L231 Difference]: Finished difference. Result has 521 places, 777 transitions, 12104 flow [2024-06-04 15:45:11,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11809, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=773, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=681, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12104, PETRI_PLACES=521, PETRI_TRANSITIONS=777} [2024-06-04 15:45:11,468 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 479 predicate places. [2024-06-04 15:45:11,468 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 777 transitions, 12104 flow [2024-06-04 15:45:11,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:45:11,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:45:11,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:45:11,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-04 15:45:11,476 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:45:11,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:45:11,476 INFO L85 PathProgramCache]: Analyzing trace with hash 158466984, now seen corresponding path program 3 times [2024-06-04 15:45:11,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:45:11,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549179653] [2024-06-04 15:45:11,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:45:11,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:45:11,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:45:12,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:45:12,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:45:12,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549179653] [2024-06-04 15:45:12,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549179653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:45:12,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:45:12,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:45:12,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508937706] [2024-06-04 15:45:12,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:45:12,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:45:12,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:45:12,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:45:12,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:45:12,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:45:12,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 777 transitions, 12104 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:45:12,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:45:12,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:45:12,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:45:14,952 INFO L124 PetriNetUnfolderBase]: 4507/6947 cut-off events. [2024-06-04 15:45:14,953 INFO L125 PetriNetUnfolderBase]: For 818151/818160 co-relation queries the response was YES. [2024-06-04 15:45:15,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63287 conditions, 6947 events. 4507/6947 cut-off events. For 818151/818160 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 41346 event pairs, 689 based on Foata normal form. 10/6952 useless extension candidates. Maximal degree in co-relation 63061. Up to 6514 conditions per place. [2024-06-04 15:45:15,079 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 718 selfloop transitions, 89 changer transitions 0/811 dead transitions. [2024-06-04 15:45:15,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 811 transitions, 14087 flow [2024-06-04 15:45:15,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:45:15,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:45:15,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-04 15:45:15,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292682926829268 [2024-06-04 15:45:15,080 INFO L175 Difference]: Start difference. First operand has 521 places, 777 transitions, 12104 flow. Second operand 10 states and 176 transitions. [2024-06-04 15:45:15,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 811 transitions, 14087 flow [2024-06-04 15:45:21,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 811 transitions, 13848 flow, removed 32 selfloop flow, removed 10 redundant places. [2024-06-04 15:45:21,074 INFO L231 Difference]: Finished difference. Result has 521 places, 781 transitions, 12162 flow [2024-06-04 15:45:21,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11865, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=777, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=688, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12162, PETRI_PLACES=521, PETRI_TRANSITIONS=781} [2024-06-04 15:45:21,075 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 479 predicate places. [2024-06-04 15:45:21,075 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 781 transitions, 12162 flow [2024-06-04 15:45:21,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:45:21,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:45:21,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:45:21,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-04 15:45:21,076 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:45:21,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:45:21,076 INFO L85 PathProgramCache]: Analyzing trace with hash 202321630, now seen corresponding path program 4 times [2024-06-04 15:45:21,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:45:21,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681310492] [2024-06-04 15:45:21,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:45:21,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:45:21,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:45:22,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:45:22,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:45:22,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681310492] [2024-06-04 15:45:22,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681310492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:45:22,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:45:22,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:45:22,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884754913] [2024-06-04 15:45:22,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:45:22,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:45:22,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:45:22,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:45:22,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:45:22,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:45:22,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 781 transitions, 12162 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:45:22,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:45:22,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:45:22,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:45:24,659 INFO L124 PetriNetUnfolderBase]: 4527/6975 cut-off events. [2024-06-04 15:45:24,660 INFO L125 PetriNetUnfolderBase]: For 831178/831187 co-relation queries the response was YES. [2024-06-04 15:45:24,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63641 conditions, 6975 events. 4527/6975 cut-off events. For 831178/831187 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 41537 event pairs, 685 based on Foata normal form. 10/6980 useless extension candidates. Maximal degree in co-relation 63414. Up to 6489 conditions per place. [2024-06-04 15:45:24,779 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 703 selfloop transitions, 112 changer transitions 0/819 dead transitions. [2024-06-04 15:45:24,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 819 transitions, 14212 flow [2024-06-04 15:45:24,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:45:24,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:45:24,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 193 transitions. [2024-06-04 15:45:24,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4279379157427938 [2024-06-04 15:45:24,781 INFO L175 Difference]: Start difference. First operand has 521 places, 781 transitions, 12162 flow. Second operand 11 states and 193 transitions. [2024-06-04 15:45:24,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 819 transitions, 14212 flow [2024-06-04 15:45:30,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 819 transitions, 13971 flow, removed 36 selfloop flow, removed 8 redundant places. [2024-06-04 15:45:30,438 INFO L231 Difference]: Finished difference. Result has 525 places, 787 transitions, 12337 flow [2024-06-04 15:45:30,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11921, PETRI_DIFFERENCE_MINUEND_PLACES=513, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=781, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=669, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12337, PETRI_PLACES=525, PETRI_TRANSITIONS=787} [2024-06-04 15:45:30,439 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 483 predicate places. [2024-06-04 15:45:30,439 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 787 transitions, 12337 flow [2024-06-04 15:45:30,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:45:30,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:45:30,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:45:30,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-04 15:45:30,439 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:45:30,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:45:30,440 INFO L85 PathProgramCache]: Analyzing trace with hash 363944090, now seen corresponding path program 2 times [2024-06-04 15:45:30,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:45:30,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130532819] [2024-06-04 15:45:30,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:45:30,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:45:30,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:45:31,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:45:31,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:45:31,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130532819] [2024-06-04 15:45:31,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130532819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:45:31,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:45:31,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:45:31,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039153091] [2024-06-04 15:45:31,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:45:31,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:45:31,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:45:31,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:45:31,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:45:31,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:45:31,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 787 transitions, 12337 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:45:31,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:45:31,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:45:31,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:45:33,724 INFO L124 PetriNetUnfolderBase]: 4607/7095 cut-off events. [2024-06-04 15:45:33,725 INFO L125 PetriNetUnfolderBase]: For 898977/898986 co-relation queries the response was YES. [2024-06-04 15:45:33,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65022 conditions, 7095 events. 4607/7095 cut-off events. For 898977/898986 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 42355 event pairs, 697 based on Foata normal form. 18/7108 useless extension candidates. Maximal degree in co-relation 64793. Up to 6638 conditions per place. [2024-06-04 15:45:33,843 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 745 selfloop transitions, 68 changer transitions 0/817 dead transitions. [2024-06-04 15:45:33,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 817 transitions, 14302 flow [2024-06-04 15:45:33,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:45:33,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:45:33,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-04 15:45:33,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-04 15:45:33,845 INFO L175 Difference]: Start difference. First operand has 525 places, 787 transitions, 12337 flow. Second operand 8 states and 144 transitions. [2024-06-04 15:45:33,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 817 transitions, 14302 flow [2024-06-04 15:45:40,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 817 transitions, 14025 flow, removed 43 selfloop flow, removed 9 redundant places. [2024-06-04 15:45:40,472 INFO L231 Difference]: Finished difference. Result has 524 places, 789 transitions, 12270 flow [2024-06-04 15:45:40,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12060, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=787, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=719, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12270, PETRI_PLACES=524, PETRI_TRANSITIONS=789} [2024-06-04 15:45:40,473 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 482 predicate places. [2024-06-04 15:45:40,473 INFO L495 AbstractCegarLoop]: Abstraction has has 524 places, 789 transitions, 12270 flow [2024-06-04 15:45:40,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:45:40,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:45:40,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:45:40,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-04 15:45:40,473 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:45:40,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:45:40,474 INFO L85 PathProgramCache]: Analyzing trace with hash 600119202, now seen corresponding path program 1 times [2024-06-04 15:45:40,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:45:40,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360608151] [2024-06-04 15:45:40,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:45:40,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:45:40,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:45:41,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:45:41,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:45:41,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360608151] [2024-06-04 15:45:41,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360608151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:45:41,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:45:41,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:45:41,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569145515] [2024-06-04 15:45:41,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:45:41,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:45:41,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:45:41,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:45:41,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:45:41,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:45:41,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 789 transitions, 12270 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:45:41,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:45:41,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:45:41,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:45:43,831 INFO L124 PetriNetUnfolderBase]: 4617/7112 cut-off events. [2024-06-04 15:45:43,831 INFO L125 PetriNetUnfolderBase]: For 824978/824987 co-relation queries the response was YES. [2024-06-04 15:45:43,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64969 conditions, 7112 events. 4617/7112 cut-off events. For 824978/824987 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 42566 event pairs, 778 based on Foata normal form. 8/7115 useless extension candidates. Maximal degree in co-relation 64740. Up to 6815 conditions per place. [2024-06-04 15:45:43,957 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 751 selfloop transitions, 52 changer transitions 0/807 dead transitions. [2024-06-04 15:45:43,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 807 transitions, 14109 flow [2024-06-04 15:45:43,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:45:43,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:45:43,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-04 15:45:43,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-04 15:45:43,958 INFO L175 Difference]: Start difference. First operand has 524 places, 789 transitions, 12270 flow. Second operand 7 states and 122 transitions. [2024-06-04 15:45:43,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 807 transitions, 14109 flow [2024-06-04 15:45:49,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 807 transitions, 13977 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-04 15:45:49,990 INFO L231 Difference]: Finished difference. Result has 525 places, 792 transitions, 12378 flow [2024-06-04 15:45:49,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12138, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=789, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=737, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12378, PETRI_PLACES=525, PETRI_TRANSITIONS=792} [2024-06-04 15:45:49,991 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 483 predicate places. [2024-06-04 15:45:49,991 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 792 transitions, 12378 flow [2024-06-04 15:45:49,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:45:49,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:45:49,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:45:49,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-04 15:45:49,992 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:45:49,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:45:49,992 INFO L85 PathProgramCache]: Analyzing trace with hash 600119450, now seen corresponding path program 3 times [2024-06-04 15:45:49,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:45:49,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571565465] [2024-06-04 15:45:49,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:45:49,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:45:50,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:45:50,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:45:50,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:45:50,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571565465] [2024-06-04 15:45:50,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571565465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:45:50,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:45:50,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:45:50,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048404221] [2024-06-04 15:45:50,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:45:50,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:45:50,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:45:50,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:45:50,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:45:51,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:45:51,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 792 transitions, 12378 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:45:51,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:45:51,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:45:51,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:45:53,438 INFO L124 PetriNetUnfolderBase]: 4661/7186 cut-off events. [2024-06-04 15:45:53,438 INFO L125 PetriNetUnfolderBase]: For 905781/905790 co-relation queries the response was YES. [2024-06-04 15:45:53,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66039 conditions, 7186 events. 4661/7186 cut-off events. For 905781/905790 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 43148 event pairs, 788 based on Foata normal form. 18/7199 useless extension candidates. Maximal degree in co-relation 65809. Up to 6852 conditions per place. [2024-06-04 15:45:53,554 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 763 selfloop transitions, 45 changer transitions 0/812 dead transitions. [2024-06-04 15:45:53,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 812 transitions, 14233 flow [2024-06-04 15:45:53,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:45:53,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:45:53,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-04 15:45:53,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-04 15:45:53,555 INFO L175 Difference]: Start difference. First operand has 525 places, 792 transitions, 12378 flow. Second operand 7 states and 124 transitions. [2024-06-04 15:45:53,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 812 transitions, 14233 flow [2024-06-04 15:46:00,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 812 transitions, 14063 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-04 15:46:00,174 INFO L231 Difference]: Finished difference. Result has 526 places, 793 transitions, 12347 flow [2024-06-04 15:46:00,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12208, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=792, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=747, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12347, PETRI_PLACES=526, PETRI_TRANSITIONS=793} [2024-06-04 15:46:00,175 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 484 predicate places. [2024-06-04 15:46:00,175 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 793 transitions, 12347 flow [2024-06-04 15:46:00,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:46:00,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:46:00,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:46:00,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-04 15:46:00,175 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:46:00,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:46:00,176 INFO L85 PathProgramCache]: Analyzing trace with hash 363937146, now seen corresponding path program 5 times [2024-06-04 15:46:00,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:46:00,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912838125] [2024-06-04 15:46:00,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:46:00,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:46:00,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:46:01,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:46:01,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:46:01,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912838125] [2024-06-04 15:46:01,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912838125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:46:01,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:46:01,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:46:01,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835411457] [2024-06-04 15:46:01,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:46:01,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:46:01,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:46:01,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:46:01,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:46:01,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:46:01,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 793 transitions, 12347 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:46:01,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:46:01,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:46:01,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:46:03,661 INFO L124 PetriNetUnfolderBase]: 4681/7213 cut-off events. [2024-06-04 15:46:03,662 INFO L125 PetriNetUnfolderBase]: For 858067/858076 co-relation queries the response was YES. [2024-06-04 15:46:03,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66327 conditions, 7213 events. 4681/7213 cut-off events. For 858067/858076 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 43266 event pairs, 780 based on Foata normal form. 10/7218 useless extension candidates. Maximal degree in co-relation 66097. Up to 6745 conditions per place. [2024-06-04 15:46:03,778 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 731 selfloop transitions, 89 changer transitions 0/824 dead transitions. [2024-06-04 15:46:03,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 824 transitions, 14329 flow [2024-06-04 15:46:03,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:46:03,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:46:03,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-04 15:46:03,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-04 15:46:03,779 INFO L175 Difference]: Start difference. First operand has 526 places, 793 transitions, 12347 flow. Second operand 9 states and 160 transitions. [2024-06-04 15:46:03,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 824 transitions, 14329 flow [2024-06-04 15:46:09,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 824 transitions, 14238 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-04 15:46:09,207 INFO L231 Difference]: Finished difference. Result has 530 places, 797 transitions, 12561 flow [2024-06-04 15:46:09,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12256, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=793, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=704, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12561, PETRI_PLACES=530, PETRI_TRANSITIONS=797} [2024-06-04 15:46:09,207 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 488 predicate places. [2024-06-04 15:46:09,208 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 797 transitions, 12561 flow [2024-06-04 15:46:09,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:46:09,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:46:09,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:46:09,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-04 15:46:09,208 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:46:09,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:46:09,208 INFO L85 PathProgramCache]: Analyzing trace with hash 600416120, now seen corresponding path program 4 times [2024-06-04 15:46:09,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:46:09,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291464105] [2024-06-04 15:46:09,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:46:09,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:46:09,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:46:10,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:46:10,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:46:10,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291464105] [2024-06-04 15:46:10,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291464105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:46:10,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:46:10,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:46:10,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892756569] [2024-06-04 15:46:10,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:46:10,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:46:10,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:46:10,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:46:10,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:46:10,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:46:10,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 797 transitions, 12561 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:46:10,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:46:10,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:46:10,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:46:12,635 INFO L124 PetriNetUnfolderBase]: 4709/7254 cut-off events. [2024-06-04 15:46:12,635 INFO L125 PetriNetUnfolderBase]: For 896272/896281 co-relation queries the response was YES. [2024-06-04 15:46:12,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67015 conditions, 7254 events. 4709/7254 cut-off events. For 896272/896281 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 43510 event pairs, 806 based on Foata normal form. 14/7263 useless extension candidates. Maximal degree in co-relation 66784. Up to 6971 conditions per place. [2024-06-04 15:46:12,788 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 777 selfloop transitions, 35 changer transitions 0/816 dead transitions. [2024-06-04 15:46:12,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 816 transitions, 14381 flow [2024-06-04 15:46:12,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:46:12,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:46:12,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-04 15:46:12,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-04 15:46:12,790 INFO L175 Difference]: Start difference. First operand has 530 places, 797 transitions, 12561 flow. Second operand 7 states and 120 transitions. [2024-06-04 15:46:12,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 816 transitions, 14381 flow [2024-06-04 15:46:19,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 816 transitions, 14132 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-04 15:46:19,560 INFO L231 Difference]: Finished difference. Result has 531 places, 800 transitions, 12478 flow [2024-06-04 15:46:19,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12312, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=797, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=762, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12478, PETRI_PLACES=531, PETRI_TRANSITIONS=800} [2024-06-04 15:46:19,561 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 489 predicate places. [2024-06-04 15:46:19,561 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 800 transitions, 12478 flow [2024-06-04 15:46:19,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:46:19,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:46:19,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:46:19,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-04 15:46:19,562 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:46:19,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:46:19,562 INFO L85 PathProgramCache]: Analyzing trace with hash 591838296, now seen corresponding path program 6 times [2024-06-04 15:46:19,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:46:19,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950386536] [2024-06-04 15:46:19,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:46:19,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:46:19,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:46:20,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:46:20,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:46:20,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950386536] [2024-06-04 15:46:20,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950386536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:46:20,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:46:20,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:46:20,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773554365] [2024-06-04 15:46:20,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:46:20,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:46:20,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:46:20,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:46:20,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:46:20,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:46:20,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 800 transitions, 12478 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:46:20,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:46:20,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:46:20,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:46:22,977 INFO L124 PetriNetUnfolderBase]: 4729/7284 cut-off events. [2024-06-04 15:46:22,978 INFO L125 PetriNetUnfolderBase]: For 889481/889490 co-relation queries the response was YES. [2024-06-04 15:46:23,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67437 conditions, 7284 events. 4729/7284 cut-off events. For 889481/889490 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 43808 event pairs, 798 based on Foata normal form. 10/7289 useless extension candidates. Maximal degree in co-relation 67204. Up to 6985 conditions per place. [2024-06-04 15:46:23,096 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 774 selfloop transitions, 43 changer transitions 0/821 dead transitions. [2024-06-04 15:46:23,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 821 transitions, 14367 flow [2024-06-04 15:46:23,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:46:23,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:46:23,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-04 15:46:23,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-04 15:46:23,098 INFO L175 Difference]: Start difference. First operand has 531 places, 800 transitions, 12478 flow. Second operand 8 states and 137 transitions. [2024-06-04 15:46:23,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 821 transitions, 14367 flow [2024-06-04 15:46:29,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 821 transitions, 14258 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-04 15:46:29,384 INFO L231 Difference]: Finished difference. Result has 535 places, 804 transitions, 12590 flow [2024-06-04 15:46:29,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12369, PETRI_DIFFERENCE_MINUEND_PLACES=527, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=800, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=757, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12590, PETRI_PLACES=535, PETRI_TRANSITIONS=804} [2024-06-04 15:46:29,385 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 493 predicate places. [2024-06-04 15:46:29,385 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 804 transitions, 12590 flow [2024-06-04 15:46:29,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:46:29,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:46:29,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:46:29,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-04 15:46:29,386 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:46:29,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:46:29,386 INFO L85 PathProgramCache]: Analyzing trace with hash 363759144, now seen corresponding path program 6 times [2024-06-04 15:46:29,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:46:29,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624979105] [2024-06-04 15:46:29,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:46:29,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:46:29,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:46:30,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:46:30,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:46:30,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624979105] [2024-06-04 15:46:30,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624979105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:46:30,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:46:30,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:46:30,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132796308] [2024-06-04 15:46:30,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:46:30,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:46:30,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:46:30,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:46:30,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:46:30,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:46:30,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 804 transitions, 12590 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:46:30,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:46:30,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:46:30,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:46:32,762 INFO L124 PetriNetUnfolderBase]: 4726/7281 cut-off events. [2024-06-04 15:46:32,762 INFO L125 PetriNetUnfolderBase]: For 874530/874539 co-relation queries the response was YES. [2024-06-04 15:46:33,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67291 conditions, 7281 events. 4726/7281 cut-off events. For 874530/874539 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 43771 event pairs, 820 based on Foata normal form. 7/7283 useless extension candidates. Maximal degree in co-relation 67057. Up to 6769 conditions per place. [2024-06-04 15:46:33,034 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 704 selfloop transitions, 120 changer transitions 0/828 dead transitions. [2024-06-04 15:46:33,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 828 transitions, 14321 flow [2024-06-04 15:46:33,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:46:33,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:46:33,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-04 15:46:33,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-04 15:46:33,036 INFO L175 Difference]: Start difference. First operand has 535 places, 804 transitions, 12590 flow. Second operand 8 states and 149 transitions. [2024-06-04 15:46:33,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 828 transitions, 14321 flow [2024-06-04 15:46:39,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 828 transitions, 14114 flow, removed 65 selfloop flow, removed 6 redundant places. [2024-06-04 15:46:39,900 INFO L231 Difference]: Finished difference. Result has 537 places, 804 transitions, 12635 flow [2024-06-04 15:46:39,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12383, PETRI_DIFFERENCE_MINUEND_PLACES=529, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=804, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=684, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12635, PETRI_PLACES=537, PETRI_TRANSITIONS=804} [2024-06-04 15:46:39,900 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 495 predicate places. [2024-06-04 15:46:39,900 INFO L495 AbstractCegarLoop]: Abstraction has has 537 places, 804 transitions, 12635 flow [2024-06-04 15:46:39,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:46:39,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:46:39,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:46:39,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-04 15:46:39,901 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:46:39,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:46:39,901 INFO L85 PathProgramCache]: Analyzing trace with hash -544431906, now seen corresponding path program 7 times [2024-06-04 15:46:39,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:46:39,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389687607] [2024-06-04 15:46:39,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:46:39,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:46:39,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:46:40,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:46:40,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:46:40,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389687607] [2024-06-04 15:46:40,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389687607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:46:40,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:46:40,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:46:40,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47842522] [2024-06-04 15:46:40,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:46:40,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:46:40,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:46:40,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:46:40,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:46:41,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:46:41,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 537 places, 804 transitions, 12635 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:46:41,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:46:41,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:46:41,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:46:43,427 INFO L124 PetriNetUnfolderBase]: 4714/7273 cut-off events. [2024-06-04 15:46:43,428 INFO L125 PetriNetUnfolderBase]: For 879366/879375 co-relation queries the response was YES. [2024-06-04 15:46:43,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66742 conditions, 7273 events. 4714/7273 cut-off events. For 879366/879375 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 43823 event pairs, 778 based on Foata normal form. 10/7278 useless extension candidates. Maximal degree in co-relation 66507. Up to 6696 conditions per place. [2024-06-04 15:46:43,551 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 709 selfloop transitions, 128 changer transitions 0/841 dead transitions. [2024-06-04 15:46:43,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 841 transitions, 14616 flow [2024-06-04 15:46:43,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:46:43,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:46:43,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-04 15:46:43,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44878048780487806 [2024-06-04 15:46:43,552 INFO L175 Difference]: Start difference. First operand has 537 places, 804 transitions, 12635 flow. Second operand 10 states and 184 transitions. [2024-06-04 15:46:43,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 841 transitions, 14616 flow [2024-06-04 15:46:50,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 538 places, 841 transitions, 14179 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-04 15:46:50,032 INFO L231 Difference]: Finished difference. Result has 540 places, 806 transitions, 12551 flow [2024-06-04 15:46:50,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12204, PETRI_DIFFERENCE_MINUEND_PLACES=529, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=804, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=676, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12551, PETRI_PLACES=540, PETRI_TRANSITIONS=806} [2024-06-04 15:46:50,033 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 498 predicate places. [2024-06-04 15:46:50,033 INFO L495 AbstractCegarLoop]: Abstraction has has 540 places, 806 transitions, 12551 flow [2024-06-04 15:46:50,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:46:50,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:46:50,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:46:50,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-04 15:46:50,034 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:46:50,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:46:50,034 INFO L85 PathProgramCache]: Analyzing trace with hash -721661858, now seen corresponding path program 8 times [2024-06-04 15:46:50,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:46:50,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300404393] [2024-06-04 15:46:50,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:46:50,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:46:50,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:46:51,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:46:51,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:46:51,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300404393] [2024-06-04 15:46:51,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300404393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:46:51,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:46:51,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:46:51,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446370832] [2024-06-04 15:46:51,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:46:51,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:46:51,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:46:51,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:46:51,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:46:51,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:46:51,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 806 transitions, 12551 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:46:51,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:46:51,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:46:51,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:46:53,522 INFO L124 PetriNetUnfolderBase]: 4771/7347 cut-off events. [2024-06-04 15:46:53,522 INFO L125 PetriNetUnfolderBase]: For 894153/894162 co-relation queries the response was YES. [2024-06-04 15:46:53,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67955 conditions, 7347 events. 4771/7347 cut-off events. For 894153/894162 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 44164 event pairs, 829 based on Foata normal form. 8/7350 useless extension candidates. Maximal degree in co-relation 67718. Up to 6907 conditions per place. [2024-06-04 15:46:53,645 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 759 selfloop transitions, 108 changer transitions 0/871 dead transitions. [2024-06-04 15:46:53,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 550 places, 871 transitions, 15222 flow [2024-06-04 15:46:53,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:46:53,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:46:53,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 189 transitions. [2024-06-04 15:46:53,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4190687361419069 [2024-06-04 15:46:53,646 INFO L175 Difference]: Start difference. First operand has 540 places, 806 transitions, 12551 flow. Second operand 11 states and 189 transitions. [2024-06-04 15:46:53,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 550 places, 871 transitions, 15222 flow [2024-06-04 15:47:00,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 541 places, 871 transitions, 14865 flow, removed 32 selfloop flow, removed 9 redundant places. [2024-06-04 15:47:00,285 INFO L231 Difference]: Finished difference. Result has 545 places, 837 transitions, 13028 flow [2024-06-04 15:47:00,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12198, PETRI_DIFFERENCE_MINUEND_PLACES=531, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=806, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=706, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13028, PETRI_PLACES=545, PETRI_TRANSITIONS=837} [2024-06-04 15:47:00,286 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 503 predicate places. [2024-06-04 15:47:00,286 INFO L495 AbstractCegarLoop]: Abstraction has has 545 places, 837 transitions, 13028 flow [2024-06-04 15:47:00,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:47:00,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:47:00,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:47:00,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-04 15:47:00,287 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:47:00,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:47:00,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1360080640, now seen corresponding path program 9 times [2024-06-04 15:47:00,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:47:00,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693452229] [2024-06-04 15:47:00,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:47:00,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:47:00,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:47:01,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:47:01,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:47:01,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693452229] [2024-06-04 15:47:01,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693452229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:47:01,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:47:01,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:47:01,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702255399] [2024-06-04 15:47:01,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:47:01,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:47:01,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:47:01,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:47:01,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:47:01,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:47:01,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 545 places, 837 transitions, 13028 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:47:01,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:47:01,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:47:01,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:47:04,021 INFO L124 PetriNetUnfolderBase]: 4950/7604 cut-off events. [2024-06-04 15:47:04,021 INFO L125 PetriNetUnfolderBase]: For 962851/962860 co-relation queries the response was YES. [2024-06-04 15:47:04,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71256 conditions, 7604 events. 4950/7604 cut-off events. For 962851/962860 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 45788 event pairs, 833 based on Foata normal form. 12/7611 useless extension candidates. Maximal degree in co-relation 71016. Up to 6735 conditions per place. [2024-06-04 15:47:04,312 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 617 selfloop transitions, 315 changer transitions 0/936 dead transitions. [2024-06-04 15:47:04,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 557 places, 936 transitions, 16438 flow [2024-06-04 15:47:04,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 15:47:04,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 15:47:04,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 229 transitions. [2024-06-04 15:47:04,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42964352720450283 [2024-06-04 15:47:04,313 INFO L175 Difference]: Start difference. First operand has 545 places, 837 transitions, 13028 flow. Second operand 13 states and 229 transitions. [2024-06-04 15:47:04,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 557 places, 936 transitions, 16438 flow [2024-06-04 15:47:11,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 554 places, 936 transitions, 16150 flow, removed 109 selfloop flow, removed 3 redundant places. [2024-06-04 15:47:11,357 INFO L231 Difference]: Finished difference. Result has 557 places, 896 transitions, 14635 flow [2024-06-04 15:47:11,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12799, PETRI_DIFFERENCE_MINUEND_PLACES=542, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=837, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=14635, PETRI_PLACES=557, PETRI_TRANSITIONS=896} [2024-06-04 15:47:11,358 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 515 predicate places. [2024-06-04 15:47:11,358 INFO L495 AbstractCegarLoop]: Abstraction has has 557 places, 896 transitions, 14635 flow [2024-06-04 15:47:11,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:47:11,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:47:11,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:47:11,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-04 15:47:11,359 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:47:11,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:47:11,359 INFO L85 PathProgramCache]: Analyzing trace with hash -691334912, now seen corresponding path program 10 times [2024-06-04 15:47:11,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:47:11,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098757385] [2024-06-04 15:47:11,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:47:11,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:47:11,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:47:12,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:47:12,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:47:12,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098757385] [2024-06-04 15:47:12,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098757385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:47:12,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:47:12,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:47:12,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567768316] [2024-06-04 15:47:12,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:47:12,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:47:12,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:47:12,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:47:12,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:47:12,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:47:12,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 557 places, 896 transitions, 14635 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:47:12,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:47:12,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:47:12,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:47:15,273 INFO L124 PetriNetUnfolderBase]: 5002/7675 cut-off events. [2024-06-04 15:47:15,273 INFO L125 PetriNetUnfolderBase]: For 1003650/1003652 co-relation queries the response was YES. [2024-06-04 15:47:15,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74130 conditions, 7675 events. 5002/7675 cut-off events. For 1003650/1003652 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 46164 event pairs, 827 based on Foata normal form. 4/7670 useless extension candidates. Maximal degree in co-relation 73886. Up to 6598 conditions per place. [2024-06-04 15:47:15,407 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 658 selfloop transitions, 286 changer transitions 0/948 dead transitions. [2024-06-04 15:47:15,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 570 places, 948 transitions, 17374 flow [2024-06-04 15:47:15,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-04 15:47:15,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-04 15:47:15,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 243 transitions. [2024-06-04 15:47:15,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42334494773519166 [2024-06-04 15:47:15,408 INFO L175 Difference]: Start difference. First operand has 557 places, 896 transitions, 14635 flow. Second operand 14 states and 243 transitions. [2024-06-04 15:47:15,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 570 places, 948 transitions, 17374 flow [2024-06-04 15:47:22,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 562 places, 948 transitions, 16647 flow, removed 186 selfloop flow, removed 8 redundant places. [2024-06-04 15:47:22,019 INFO L231 Difference]: Finished difference. Result has 564 places, 904 transitions, 14825 flow [2024-06-04 15:47:22,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13928, PETRI_DIFFERENCE_MINUEND_PLACES=549, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=896, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=281, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=14825, PETRI_PLACES=564, PETRI_TRANSITIONS=904} [2024-06-04 15:47:22,020 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 522 predicate places. [2024-06-04 15:47:22,020 INFO L495 AbstractCegarLoop]: Abstraction has has 564 places, 904 transitions, 14825 flow [2024-06-04 15:47:22,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:47:22,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:47:22,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:47:22,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-04 15:47:22,020 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:47:22,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:47:22,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1284995324, now seen corresponding path program 5 times [2024-06-04 15:47:22,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:47:22,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656786173] [2024-06-04 15:47:22,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:47:22,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:47:22,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:47:23,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:47:23,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:47:23,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656786173] [2024-06-04 15:47:23,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656786173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:47:23,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:47:23,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:47:23,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342212356] [2024-06-04 15:47:23,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:47:23,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:47:23,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:47:23,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:47:23,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:47:23,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:47:23,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 564 places, 904 transitions, 14825 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:47:23,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:47:23,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:47:23,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:47:25,943 INFO L124 PetriNetUnfolderBase]: 5046/7743 cut-off events. [2024-06-04 15:47:25,943 INFO L125 PetriNetUnfolderBase]: For 1067661/1067663 co-relation queries the response was YES. [2024-06-04 15:47:26,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75341 conditions, 7743 events. 5046/7743 cut-off events. For 1067661/1067663 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 46667 event pairs, 835 based on Foata normal form. 12/7746 useless extension candidates. Maximal degree in co-relation 75095. Up to 7218 conditions per place. [2024-06-04 15:47:26,223 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 842 selfloop transitions, 91 changer transitions 0/937 dead transitions. [2024-06-04 15:47:26,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 573 places, 937 transitions, 17062 flow [2024-06-04 15:47:26,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:47:26,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:47:26,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-04 15:47:26,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.424390243902439 [2024-06-04 15:47:26,224 INFO L175 Difference]: Start difference. First operand has 564 places, 904 transitions, 14825 flow. Second operand 10 states and 174 transitions. [2024-06-04 15:47:26,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 573 places, 937 transitions, 17062 flow [2024-06-04 15:47:32,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 560 places, 937 transitions, 16496 flow, removed 129 selfloop flow, removed 13 redundant places. [2024-06-04 15:47:32,095 INFO L231 Difference]: Finished difference. Result has 561 places, 905 transitions, 14486 flow [2024-06-04 15:47:32,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14259, PETRI_DIFFERENCE_MINUEND_PLACES=551, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=904, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=813, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14486, PETRI_PLACES=561, PETRI_TRANSITIONS=905} [2024-06-04 15:47:32,096 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 519 predicate places. [2024-06-04 15:47:32,096 INFO L495 AbstractCegarLoop]: Abstraction has has 561 places, 905 transitions, 14486 flow [2024-06-04 15:47:32,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:47:32,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:47:32,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:47:32,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-04 15:47:32,097 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:47:32,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:47:32,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1284988380, now seen corresponding path program 11 times [2024-06-04 15:47:32,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:47:32,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568841766] [2024-06-04 15:47:32,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:47:32,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:47:32,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:47:33,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:47:33,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:47:33,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568841766] [2024-06-04 15:47:33,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568841766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:47:33,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:47:33,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:47:33,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779728458] [2024-06-04 15:47:33,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:47:33,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:47:33,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:47:33,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:47:33,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:47:33,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:47:33,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 561 places, 905 transitions, 14486 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:47:33,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:47:33,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:47:33,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:47:36,153 INFO L124 PetriNetUnfolderBase]: 5056/7772 cut-off events. [2024-06-04 15:47:36,153 INFO L125 PetriNetUnfolderBase]: For 966790/966799 co-relation queries the response was YES. [2024-06-04 15:47:36,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74822 conditions, 7772 events. 5056/7772 cut-off events. For 966790/966799 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 47081 event pairs, 839 based on Foata normal form. 8/7775 useless extension candidates. Maximal degree in co-relation 74579. Up to 7429 conditions per place. [2024-06-04 15:47:36,295 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 886 selfloop transitions, 65 changer transitions 0/955 dead transitions. [2024-06-04 15:47:36,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 573 places, 955 transitions, 16877 flow [2024-06-04 15:47:36,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 15:47:36,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 15:47:36,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 206 transitions. [2024-06-04 15:47:36,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38649155722326456 [2024-06-04 15:47:36,297 INFO L175 Difference]: Start difference. First operand has 561 places, 905 transitions, 14486 flow. Second operand 13 states and 206 transitions. [2024-06-04 15:47:36,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 573 places, 955 transitions, 16877 flow [2024-06-04 15:47:43,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 564 places, 955 transitions, 16642 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-04 15:47:43,786 INFO L231 Difference]: Finished difference. Result has 570 places, 927 transitions, 14796 flow [2024-06-04 15:47:43,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14262, PETRI_DIFFERENCE_MINUEND_PLACES=552, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=905, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=847, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=14796, PETRI_PLACES=570, PETRI_TRANSITIONS=927} [2024-06-04 15:47:43,787 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 528 predicate places. [2024-06-04 15:47:43,787 INFO L495 AbstractCegarLoop]: Abstraction has has 570 places, 927 transitions, 14796 flow [2024-06-04 15:47:43,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:47:43,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:47:43,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:47:43,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-04 15:47:43,788 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:47:43,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:47:43,788 INFO L85 PathProgramCache]: Analyzing trace with hash 852656092, now seen corresponding path program 12 times [2024-06-04 15:47:43,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:47:43,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268907945] [2024-06-04 15:47:43,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:47:43,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:47:43,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:47:44,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:47:44,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:47:44,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268907945] [2024-06-04 15:47:44,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268907945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:47:44,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:47:44,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:47:44,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834946179] [2024-06-04 15:47:44,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:47:44,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:47:44,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:47:44,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:47:44,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:47:44,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:47:44,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 570 places, 927 transitions, 14796 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:47:44,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:47:44,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:47:44,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:47:47,824 INFO L124 PetriNetUnfolderBase]: 5164/7911 cut-off events. [2024-06-04 15:47:47,824 INFO L125 PetriNetUnfolderBase]: For 1079199/1079208 co-relation queries the response was YES. [2024-06-04 15:47:47,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77986 conditions, 7911 events. 5164/7911 cut-off events. For 1079199/1079208 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 47667 event pairs, 683 based on Foata normal form. 10/7916 useless extension candidates. Maximal degree in co-relation 77737. Up to 5885 conditions per place. [2024-06-04 15:47:47,983 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 484 selfloop transitions, 497 changer transitions 0/985 dead transitions. [2024-06-04 15:47:47,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 582 places, 985 transitions, 18117 flow [2024-06-04 15:47:47,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 15:47:47,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 15:47:47,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 233 transitions. [2024-06-04 15:47:47,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4371482176360225 [2024-06-04 15:47:47,985 INFO L175 Difference]: Start difference. First operand has 570 places, 927 transitions, 14796 flow. Second operand 13 states and 233 transitions. [2024-06-04 15:47:47,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 582 places, 985 transitions, 18117 flow [2024-06-04 15:47:55,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 578 places, 985 transitions, 17866 flow, removed 85 selfloop flow, removed 4 redundant places. [2024-06-04 15:47:55,395 INFO L231 Difference]: Finished difference. Result has 580 places, 945 transitions, 16276 flow [2024-06-04 15:47:55,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14545, PETRI_DIFFERENCE_MINUEND_PLACES=566, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=927, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=482, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=16276, PETRI_PLACES=580, PETRI_TRANSITIONS=945} [2024-06-04 15:47:55,395 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 538 predicate places. [2024-06-04 15:47:55,396 INFO L495 AbstractCegarLoop]: Abstraction has has 580 places, 945 transitions, 16276 flow [2024-06-04 15:47:55,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:47:55,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:47:55,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:47:55,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-04 15:47:55,396 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:47:55,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:47:55,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1284815400, now seen corresponding path program 13 times [2024-06-04 15:47:55,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:47:55,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118603818] [2024-06-04 15:47:55,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:47:55,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:47:55,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:47:56,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:47:56,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:47:56,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118603818] [2024-06-04 15:47:56,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118603818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:47:56,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:47:56,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:47:56,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594590393] [2024-06-04 15:47:56,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:47:56,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:47:56,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:47:56,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:47:56,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:47:56,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:47:56,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 580 places, 945 transitions, 16276 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:47:56,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:47:56,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:47:56,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:47:59,636 INFO L124 PetriNetUnfolderBase]: 5174/7931 cut-off events. [2024-06-04 15:47:59,636 INFO L125 PetriNetUnfolderBase]: For 1097406/1097415 co-relation queries the response was YES. [2024-06-04 15:47:59,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80989 conditions, 7931 events. 5174/7931 cut-off events. For 1097406/1097415 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 47905 event pairs, 857 based on Foata normal form. 8/7934 useless extension candidates. Maximal degree in co-relation 80737. Up to 7592 conditions per place. [2024-06-04 15:47:59,783 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 906 selfloop transitions, 65 changer transitions 0/975 dead transitions. [2024-06-04 15:47:59,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 591 places, 975 transitions, 18429 flow [2024-06-04 15:47:59,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 15:47:59,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 15:47:59,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 194 transitions. [2024-06-04 15:47:59,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3943089430894309 [2024-06-04 15:47:59,785 INFO L175 Difference]: Start difference. First operand has 580 places, 945 transitions, 16276 flow. Second operand 12 states and 194 transitions. [2024-06-04 15:47:59,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 591 places, 975 transitions, 18429 flow [2024-06-04 15:48:08,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 583 places, 975 transitions, 17769 flow, removed 110 selfloop flow, removed 8 redundant places. [2024-06-04 15:48:08,737 INFO L231 Difference]: Finished difference. Result has 584 places, 948 transitions, 15838 flow [2024-06-04 15:48:08,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15616, PETRI_DIFFERENCE_MINUEND_PLACES=572, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=945, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=880, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=15838, PETRI_PLACES=584, PETRI_TRANSITIONS=948} [2024-06-04 15:48:08,738 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 542 predicate places. [2024-06-04 15:48:08,738 INFO L495 AbstractCegarLoop]: Abstraction has has 584 places, 948 transitions, 15838 flow [2024-06-04 15:48:08,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:48:08,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:48:08,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:48:08,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-04 15:48:08,739 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:48:08,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:48:08,739 INFO L85 PathProgramCache]: Analyzing trace with hash -478726052, now seen corresponding path program 14 times [2024-06-04 15:48:08,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:48:08,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171202798] [2024-06-04 15:48:08,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:48:08,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:48:08,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:48:09,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:48:09,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:48:09,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171202798] [2024-06-04 15:48:09,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171202798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:48:09,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:48:09,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:48:09,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793211515] [2024-06-04 15:48:09,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:48:09,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:48:09,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:48:09,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:48:09,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:48:09,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:48:09,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 584 places, 948 transitions, 15838 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:48:09,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:48:09,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:48:09,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:48:13,051 INFO L124 PetriNetUnfolderBase]: 5220/8001 cut-off events. [2024-06-04 15:48:13,051 INFO L125 PetriNetUnfolderBase]: For 1136309/1136318 co-relation queries the response was YES. [2024-06-04 15:48:13,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81629 conditions, 8001 events. 5220/8001 cut-off events. For 1136309/1136318 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 48389 event pairs, 857 based on Foata normal form. 10/8006 useless extension candidates. Maximal degree in co-relation 81375. Up to 7516 conditions per place. [2024-06-04 15:48:13,213 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 877 selfloop transitions, 110 changer transitions 0/991 dead transitions. [2024-06-04 15:48:13,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 596 places, 991 transitions, 18535 flow [2024-06-04 15:48:13,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 15:48:13,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 15:48:13,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 219 transitions. [2024-06-04 15:48:13,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41088180112570355 [2024-06-04 15:48:13,214 INFO L175 Difference]: Start difference. First operand has 584 places, 948 transitions, 15838 flow. Second operand 13 states and 219 transitions. [2024-06-04 15:48:13,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 596 places, 991 transitions, 18535 flow [2024-06-04 15:48:21,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 587 places, 991 transitions, 18364 flow, removed 28 selfloop flow, removed 9 redundant places. [2024-06-04 15:48:21,581 INFO L231 Difference]: Finished difference. Result has 589 places, 961 transitions, 16271 flow [2024-06-04 15:48:21,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15667, PETRI_DIFFERENCE_MINUEND_PLACES=575, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=948, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=841, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=16271, PETRI_PLACES=589, PETRI_TRANSITIONS=961} [2024-06-04 15:48:21,584 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 547 predicate places. [2024-06-04 15:48:21,584 INFO L495 AbstractCegarLoop]: Abstraction has has 589 places, 961 transitions, 16271 flow [2024-06-04 15:48:21,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:48:21,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:48:21,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:48:21,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-04 15:48:21,584 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:48:21,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:48:21,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1005817600, now seen corresponding path program 15 times [2024-06-04 15:48:21,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:48:21,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845348552] [2024-06-04 15:48:21,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:48:21,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:48:21,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:48:22,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:48:22,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:48:22,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845348552] [2024-06-04 15:48:22,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845348552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:48:22,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:48:22,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:48:22,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972842404] [2024-06-04 15:48:22,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:48:22,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:48:22,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:48:22,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:48:22,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:48:22,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:48:22,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 589 places, 961 transitions, 16271 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:48:22,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:48:22,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:48:22,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:48:25,820 INFO L124 PetriNetUnfolderBase]: 5202/7979 cut-off events. [2024-06-04 15:48:25,820 INFO L125 PetriNetUnfolderBase]: For 1115866/1115875 co-relation queries the response was YES. [2024-06-04 15:48:25,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80587 conditions, 7979 events. 5202/7979 cut-off events. For 1115866/1115875 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 48316 event pairs, 873 based on Foata normal form. 12/7986 useless extension candidates. Maximal degree in co-relation 80331. Up to 7199 conditions per place. [2024-06-04 15:48:25,983 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 677 selfloop transitions, 309 changer transitions 0/990 dead transitions. [2024-06-04 15:48:25,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 600 places, 990 transitions, 18371 flow [2024-06-04 15:48:25,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 15:48:25,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 15:48:25,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 206 transitions. [2024-06-04 15:48:25,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186991869918699 [2024-06-04 15:48:25,985 INFO L175 Difference]: Start difference. First operand has 589 places, 961 transitions, 16271 flow. Second operand 12 states and 206 transitions. [2024-06-04 15:48:25,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 600 places, 990 transitions, 18371 flow [2024-06-04 15:48:34,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 591 places, 990 transitions, 18167 flow, removed 44 selfloop flow, removed 9 redundant places. [2024-06-04 15:48:34,963 INFO L231 Difference]: Finished difference. Result has 592 places, 962 transitions, 16717 flow [2024-06-04 15:48:34,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=16067, PETRI_DIFFERENCE_MINUEND_PLACES=580, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=961, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=308, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=652, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=16717, PETRI_PLACES=592, PETRI_TRANSITIONS=962} [2024-06-04 15:48:34,963 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 550 predicate places. [2024-06-04 15:48:34,964 INFO L495 AbstractCegarLoop]: Abstraction has has 592 places, 962 transitions, 16717 flow [2024-06-04 15:48:34,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:48:34,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:48:34,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:48:34,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-04 15:48:34,964 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:48:34,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:48:34,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1629616130, now seen corresponding path program 16 times [2024-06-04 15:48:34,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:48:34,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409828404] [2024-06-04 15:48:34,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:48:34,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:48:34,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:48:36,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:48:36,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:48:36,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409828404] [2024-06-04 15:48:36,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409828404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:48:36,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:48:36,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:48:36,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824653690] [2024-06-04 15:48:36,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:48:36,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:48:36,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:48:36,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:48:36,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:48:36,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:48:36,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 592 places, 962 transitions, 16717 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:48:36,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:48:36,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:48:36,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:48:39,133 INFO L124 PetriNetUnfolderBase]: 5232/8021 cut-off events. [2024-06-04 15:48:39,133 INFO L125 PetriNetUnfolderBase]: For 1132678/1132687 co-relation queries the response was YES. [2024-06-04 15:48:39,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81716 conditions, 8021 events. 5232/8021 cut-off events. For 1132678/1132687 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 48560 event pairs, 887 based on Foata normal form. 12/8028 useless extension candidates. Maximal degree in co-relation 81458. Up to 7570 conditions per place. [2024-06-04 15:48:39,295 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 855 selfloop transitions, 131 changer transitions 0/990 dead transitions. [2024-06-04 15:48:39,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 602 places, 990 transitions, 18949 flow [2024-06-04 15:48:39,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:48:39,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:48:39,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 183 transitions. [2024-06-04 15:48:39,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4057649667405765 [2024-06-04 15:48:39,297 INFO L175 Difference]: Start difference. First operand has 592 places, 962 transitions, 16717 flow. Second operand 11 states and 183 transitions. [2024-06-04 15:48:39,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 602 places, 990 transitions, 18949 flow [2024-06-04 15:48:48,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 593 places, 990 transitions, 18276 flow, removed 43 selfloop flow, removed 9 redundant places. [2024-06-04 15:48:48,820 INFO L231 Difference]: Finished difference. Result has 594 places, 970 transitions, 16518 flow [2024-06-04 15:48:48,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=16044, PETRI_DIFFERENCE_MINUEND_PLACES=583, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=962, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=831, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=16518, PETRI_PLACES=594, PETRI_TRANSITIONS=970} [2024-06-04 15:48:48,820 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 552 predicate places. [2024-06-04 15:48:48,821 INFO L495 AbstractCegarLoop]: Abstraction has has 594 places, 970 transitions, 16518 flow [2024-06-04 15:48:48,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:48:48,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:48:48,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:48:48,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-04 15:48:48,821 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:48:48,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:48:48,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1624731770, now seen corresponding path program 17 times [2024-06-04 15:48:48,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:48:48,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941052106] [2024-06-04 15:48:48,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:48:48,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:48:48,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:48:49,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:48:49,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:48:49,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941052106] [2024-06-04 15:48:49,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941052106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:48:49,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:48:49,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:48:49,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965460745] [2024-06-04 15:48:49,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:48:49,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:48:49,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:48:49,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:48:49,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:48:49,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:48:49,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 594 places, 970 transitions, 16518 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:48:49,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:48:49,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:48:49,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:48:52,904 INFO L124 PetriNetUnfolderBase]: 5284/8087 cut-off events. [2024-06-04 15:48:52,905 INFO L125 PetriNetUnfolderBase]: For 1149133/1149142 co-relation queries the response was YES. [2024-06-04 15:48:53,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82720 conditions, 8087 events. 5284/8087 cut-off events. For 1149133/1149142 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 48895 event pairs, 735 based on Foata normal form. 8/8090 useless extension candidates. Maximal degree in co-relation 82461. Up to 7508 conditions per place. [2024-06-04 15:48:53,060 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 893 selfloop transitions, 150 changer transitions 0/1047 dead transitions. [2024-06-04 15:48:53,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 603 places, 1047 transitions, 19918 flow [2024-06-04 15:48:53,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:48:53,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:48:53,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-04 15:48:53,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.424390243902439 [2024-06-04 15:48:53,061 INFO L175 Difference]: Start difference. First operand has 594 places, 970 transitions, 16518 flow. Second operand 10 states and 174 transitions. [2024-06-04 15:48:53,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 603 places, 1047 transitions, 19918 flow [2024-06-04 15:49:02,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 595 places, 1047 transitions, 19552 flow, removed 59 selfloop flow, removed 8 redundant places. [2024-06-04 15:49:02,242 INFO L231 Difference]: Finished difference. Result has 601 places, 1023 transitions, 17640 flow [2024-06-04 15:49:02,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=16185, PETRI_DIFFERENCE_MINUEND_PLACES=586, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=970, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=827, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17640, PETRI_PLACES=601, PETRI_TRANSITIONS=1023} [2024-06-04 15:49:02,243 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 559 predicate places. [2024-06-04 15:49:02,243 INFO L495 AbstractCegarLoop]: Abstraction has has 601 places, 1023 transitions, 17640 flow [2024-06-04 15:49:02,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:49:02,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:49:02,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:49:02,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-04 15:49:02,244 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:49:02,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:49:02,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1624998680, now seen corresponding path program 18 times [2024-06-04 15:49:02,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:49:02,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915380261] [2024-06-04 15:49:02,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:49:02,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:49:02,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:49:03,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:49:03,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:49:03,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915380261] [2024-06-04 15:49:03,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915380261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:49:03,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:49:03,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:49:03,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085576335] [2024-06-04 15:49:03,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:49:03,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:49:03,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:49:03,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:49:03,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:49:03,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:49:03,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 601 places, 1023 transitions, 17640 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:49:03,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:49:03,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:49:03,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:49:06,483 INFO L124 PetriNetUnfolderBase]: 5288/8103 cut-off events. [2024-06-04 15:49:06,484 INFO L125 PetriNetUnfolderBase]: For 1169399/1169408 co-relation queries the response was YES. [2024-06-04 15:49:06,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83371 conditions, 8103 events. 5288/8103 cut-off events. For 1169399/1169408 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 49143 event pairs, 730 based on Foata normal form. 10/8108 useless extension candidates. Maximal degree in co-relation 83106. Up to 7321 conditions per place. [2024-06-04 15:49:06,641 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 845 selfloop transitions, 202 changer transitions 0/1051 dead transitions. [2024-06-04 15:49:06,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 610 places, 1051 transitions, 20042 flow [2024-06-04 15:49:06,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:49:06,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:49:06,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-04 15:49:06,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4317073170731707 [2024-06-04 15:49:06,643 INFO L175 Difference]: Start difference. First operand has 601 places, 1023 transitions, 17640 flow. Second operand 10 states and 177 transitions. [2024-06-04 15:49:06,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 610 places, 1051 transitions, 20042 flow [2024-06-04 15:49:15,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 607 places, 1051 transitions, 19718 flow, removed 126 selfloop flow, removed 3 redundant places. [2024-06-04 15:49:15,862 INFO L231 Difference]: Finished difference. Result has 608 places, 1026 transitions, 17885 flow [2024-06-04 15:49:15,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=17368, PETRI_DIFFERENCE_MINUEND_PLACES=598, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1023, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=821, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17885, PETRI_PLACES=608, PETRI_TRANSITIONS=1026} [2024-06-04 15:49:15,862 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 566 predicate places. [2024-06-04 15:49:15,863 INFO L495 AbstractCegarLoop]: Abstraction has has 608 places, 1026 transitions, 17885 flow [2024-06-04 15:49:15,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:49:15,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:49:15,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:49:15,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-04 15:49:15,863 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:49:15,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:49:15,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1865606916, now seen corresponding path program 6 times [2024-06-04 15:49:15,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:49:15,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251192778] [2024-06-04 15:49:15,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:49:15,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:49:15,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:49:16,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:49:16,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:49:16,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251192778] [2024-06-04 15:49:16,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251192778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:49:16,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:49:16,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:49:16,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310505761] [2024-06-04 15:49:16,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:49:16,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:49:16,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:49:16,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:49:16,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:49:16,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:49:16,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 608 places, 1026 transitions, 17885 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:49:16,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:49:16,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:49:16,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:49:20,242 INFO L124 PetriNetUnfolderBase]: 5332/8165 cut-off events. [2024-06-04 15:49:20,243 INFO L125 PetriNetUnfolderBase]: For 1244892/1244901 co-relation queries the response was YES. [2024-06-04 15:49:20,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83926 conditions, 8165 events. 5332/8165 cut-off events. For 1244892/1244901 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 49552 event pairs, 856 based on Foata normal form. 18/8178 useless extension candidates. Maximal degree in co-relation 83660. Up to 7758 conditions per place. [2024-06-04 15:49:20,395 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 980 selfloop transitions, 66 changer transitions 0/1050 dead transitions. [2024-06-04 15:49:20,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 616 places, 1050 transitions, 20232 flow [2024-06-04 15:49:20,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:49:20,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:49:20,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-04 15:49:20,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-04 15:49:20,396 INFO L175 Difference]: Start difference. First operand has 608 places, 1026 transitions, 17885 flow. Second operand 9 states and 155 transitions. [2024-06-04 15:49:20,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 616 places, 1050 transitions, 20232 flow