./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe021_power.opt_pso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe021_power.opt_pso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe021_power.opt_pso.opt.i ./goblint.2024-06-19_11-23-25.files/protection/safe021_power.opt_pso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 21:24:36,530 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 21:24:36,595 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 21:24:36,607 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 21:24:36,607 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 21:24:36,646 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 21:24:36,646 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 21:24:36,647 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 21:24:36,647 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 21:24:36,647 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 21:24:36,648 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 21:24:36,648 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 21:24:36,648 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 21:24:36,648 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 21:24:36,649 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 21:24:36,649 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 21:24:36,649 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 21:24:36,649 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 21:24:36,650 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 21:24:36,650 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 21:24:36,650 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 21:24:36,651 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 21:24:36,651 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 21:24:36,651 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 21:24:36,651 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 21:24:36,652 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 21:24:36,652 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 21:24:36,652 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 21:24:36,652 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 21:24:36,653 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 21:24:36,653 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 21:24:36,653 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 21:24:36,653 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:24:36,654 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 21:24:36,654 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 21:24:36,654 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 21:24:36,654 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 21:24:36,655 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 21:24:36,655 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 21:24:36,660 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 21:24:36,660 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 21:24:36,660 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 21:24:36,660 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 21:24:36,661 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 21:24:36,885 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 21:24:36,925 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 21:24:36,927 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 21:24:36,928 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 21:24:36,929 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 21:24:36,930 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe021_power.opt_pso.opt.i [2024-06-27 21:24:37,986 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 21:24:38,221 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 21:24:38,221 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe021_power.opt_pso.opt.i [2024-06-27 21:24:38,232 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/089390e84/fdb0d2a05d504053a196b06e5468aa7d/FLAG196337b9c [2024-06-27 21:24:38,249 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/089390e84/fdb0d2a05d504053a196b06e5468aa7d [2024-06-27 21:24:38,251 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 21:24:38,251 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 21:24:38,252 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe021_power.opt_pso.opt.yml/witness.yml [2024-06-27 21:24:38,457 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 21:24:38,458 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 21:24:38,459 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 21:24:38,459 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 21:24:38,463 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 21:24:38,463 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:24:38" (1/2) ... [2024-06-27 21:24:38,464 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53a6a74c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:24:38, skipping insertion in model container [2024-06-27 21:24:38,464 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:24:38" (1/2) ... [2024-06-27 21:24:38,465 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@25b00ea4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:24:38, skipping insertion in model container [2024-06-27 21:24:38,466 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:24:38" (2/2) ... [2024-06-27 21:24:38,466 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53a6a74c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:24:38, skipping insertion in model container [2024-06-27 21:24:38,466 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:24:38" (2/2) ... [2024-06-27 21:24:38,467 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 21:24:38,531 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 21:24:38,533 INFO L97 edCorrectnessWitness]: Location invariant before [L825-L825] (((((((((((((((((! multithreaded || x$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (z == 0 || z == 1)) [2024-06-27 21:24:38,533 INFO L97 edCorrectnessWitness]: Location invariant before [L823-L823] (((((((((((((((((! multithreaded || x$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (z == 0 || z == 1)) [2024-06-27 21:24:38,533 INFO L97 edCorrectnessWitness]: Location invariant before [L826-L826] (((((((((((((((((! multithreaded || x$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (z == 0 || z == 1)) [2024-06-27 21:24:38,533 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 21:24:38,533 INFO L106 edCorrectnessWitness]: ghost_update [L821-L821] multithreaded = 1; [2024-06-27 21:24:38,569 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 21:24:38,854 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:24:38,862 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 21:24:38,953 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:24:38,984 INFO L206 MainTranslator]: Completed translation [2024-06-27 21:24:38,985 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:24:38 WrapperNode [2024-06-27 21:24:38,995 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 21:24:38,996 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 21:24:38,997 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 21:24:38,997 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 21:24:39,002 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:24:38" (1/1) ... [2024-06-27 21:24:39,014 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:24:38" (1/1) ... [2024-06-27 21:24:39,040 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 144 [2024-06-27 21:24:39,043 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 21:24:39,045 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 21:24:39,045 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 21:24:39,045 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 21:24:39,054 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:24:38" (1/1) ... [2024-06-27 21:24:39,054 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:24:38" (1/1) ... [2024-06-27 21:24:39,057 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:24:38" (1/1) ... [2024-06-27 21:24:39,074 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 21:24:39,074 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:24:38" (1/1) ... [2024-06-27 21:24:39,075 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:24:38" (1/1) ... [2024-06-27 21:24:39,081 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:24:38" (1/1) ... [2024-06-27 21:24:39,082 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:24:38" (1/1) ... [2024-06-27 21:24:39,083 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:24:38" (1/1) ... [2024-06-27 21:24:39,085 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:24:38" (1/1) ... [2024-06-27 21:24:39,089 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 21:24:39,092 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 21:24:39,092 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 21:24:39,092 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 21:24:39,093 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:24:38" (1/1) ... [2024-06-27 21:24:39,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:24:39,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:24:39,135 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 21:24:39,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 21:24:39,188 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 21:24:39,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 21:24:39,189 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 21:24:39,189 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 21:24:39,189 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 21:24:39,189 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 21:24:39,189 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 21:24:39,190 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 21:24:39,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 21:24:39,190 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 21:24:39,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 21:24:39,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 21:24:39,191 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 21:24:39,293 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 21:24:39,295 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 21:24:39,561 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 21:24:39,562 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 21:24:39,667 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 21:24:39,668 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 21:24:39,668 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:24:39 BoogieIcfgContainer [2024-06-27 21:24:39,668 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 21:24:39,670 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 21:24:39,670 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 21:24:39,672 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 21:24:39,672 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 09:24:38" (1/4) ... [2024-06-27 21:24:39,673 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17a57660 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:24:39, skipping insertion in model container [2024-06-27 21:24:39,673 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:24:38" (2/4) ... [2024-06-27 21:24:39,673 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17a57660 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:24:39, skipping insertion in model container [2024-06-27 21:24:39,673 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:24:38" (3/4) ... [2024-06-27 21:24:39,673 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17a57660 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:24:39, skipping insertion in model container [2024-06-27 21:24:39,673 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:24:39" (4/4) ... [2024-06-27 21:24:39,674 INFO L112 eAbstractionObserver]: Analyzing ICFG safe021_power.opt_pso.opt.i [2024-06-27 21:24:39,686 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 21:24:39,686 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 21:24:39,686 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 21:24:39,715 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 21:24:39,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-27 21:24:39,755 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-27 21:24:39,755 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:24:39,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 64 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 21:24:39,757 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-27 21:24:39,758 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-27 21:24:39,764 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 21:24:39,769 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;@1df35dc6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 21:24:39,769 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 21:24:39,771 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 21:24:39,771 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 21:24:39,771 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:24:39,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:39,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 21:24:39,772 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:24:39,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:39,776 INFO L85 PathProgramCache]: Analyzing trace with hash 372110564, now seen corresponding path program 1 times [2024-06-27 21:24:39,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:39,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507834832] [2024-06-27 21:24:39,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:39,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:39,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:40,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:24:40,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:40,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507834832] [2024-06-27 21:24:40,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507834832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:40,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:40,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 21:24:40,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390282804] [2024-06-27 21:24:40,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:40,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:24:40,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:40,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:24:40,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:24:40,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-27 21:24:40,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:40,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:40,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-27 21:24:40,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:40,878 INFO L124 PetriNetUnfolderBase]: 1152/1755 cut-off events. [2024-06-27 21:24:40,879 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-06-27 21:24:40,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3595 conditions, 1755 events. 1152/1755 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8178 event pairs, 794 based on Foata normal form. 2/1710 useless extension candidates. Maximal degree in co-relation 3583. Up to 1738 conditions per place. [2024-06-27 21:24:40,890 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 32 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-27 21:24:40,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 42 transitions, 171 flow [2024-06-27 21:24:40,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:24:40,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:24:40,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-27 21:24:40,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-27 21:24:40,944 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 72 transitions. [2024-06-27 21:24:40,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 42 transitions, 171 flow [2024-06-27 21:24:40,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 42 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 21:24:40,949 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-27 21:24:40,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-27 21:24:40,953 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-27 21:24:40,953 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-27 21:24:40,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:40,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:40,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:24:40,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 21:24:40,953 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:24:40,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:40,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1117077401, now seen corresponding path program 1 times [2024-06-27 21:24:40,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:40,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502349401] [2024-06-27 21:24:40,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:40,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:40,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:41,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:24:41,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:41,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502349401] [2024-06-27 21:24:41,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502349401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:41,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:41,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 21:24:41,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939129562] [2024-06-27 21:24:41,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:41,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 21:24:41,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:41,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 21:24:41,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 21:24:41,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-27 21:24:41,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:41,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:41,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-27 21:24:41,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:41,621 INFO L124 PetriNetUnfolderBase]: 1395/2101 cut-off events. [2024-06-27 21:24:41,621 INFO L125 PetriNetUnfolderBase]: For 316/316 co-relation queries the response was YES. [2024-06-27 21:24:41,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4853 conditions, 2101 events. 1395/2101 cut-off events. For 316/316 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9517 event pairs, 862 based on Foata normal form. 3/2102 useless extension candidates. Maximal degree in co-relation 4841. Up to 2073 conditions per place. [2024-06-27 21:24:41,629 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 42 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-27 21:24:41,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 54 transitions, 252 flow [2024-06-27 21:24:41,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:24:41,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:24:41,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 89 transitions. [2024-06-27 21:24:41,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55625 [2024-06-27 21:24:41,631 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 89 transitions. [2024-06-27 21:24:41,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 54 transitions, 252 flow [2024-06-27 21:24:41,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 54 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 21:24:41,633 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 150 flow [2024-06-27 21:24:41,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=150, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2024-06-27 21:24:41,634 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2024-06-27 21:24:41,634 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 150 flow [2024-06-27 21:24:41,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:41,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:41,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:24:41,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 21:24:41,635 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:24:41,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:41,635 INFO L85 PathProgramCache]: Analyzing trace with hash 269662507, now seen corresponding path program 1 times [2024-06-27 21:24:41,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:41,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953410534] [2024-06-27 21:24:41,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:41,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:41,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:42,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:24:42,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:42,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953410534] [2024-06-27 21:24:42,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953410534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:42,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:42,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 21:24:42,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234077536] [2024-06-27 21:24:42,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:42,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 21:24:42,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:42,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 21:24:42,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 21:24:42,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-27 21:24:42,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 150 flow. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:42,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:42,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-27 21:24:42,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:42,325 INFO L124 PetriNetUnfolderBase]: 1383/2083 cut-off events. [2024-06-27 21:24:42,326 INFO L125 PetriNetUnfolderBase]: For 1050/1058 co-relation queries the response was YES. [2024-06-27 21:24:42,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5360 conditions, 2083 events. 1383/2083 cut-off events. For 1050/1058 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9484 event pairs, 612 based on Foata normal form. 12/2093 useless extension candidates. Maximal degree in co-relation 5345. Up to 2025 conditions per place. [2024-06-27 21:24:42,336 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 50 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2024-06-27 21:24:42,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 65 transitions, 338 flow [2024-06-27 21:24:42,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:24:42,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:24:42,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2024-06-27 21:24:42,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-27 21:24:42,338 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 150 flow. Second operand 5 states and 110 transitions. [2024-06-27 21:24:42,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 65 transitions, 338 flow [2024-06-27 21:24:42,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 65 transitions, 336 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-27 21:24:42,341 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 196 flow [2024-06-27 21:24:42,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=196, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-27 21:24:42,341 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 9 predicate places. [2024-06-27 21:24:42,341 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 196 flow [2024-06-27 21:24:42,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:42,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:42,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:24:42,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 21:24:42,342 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:24:42,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:42,343 INFO L85 PathProgramCache]: Analyzing trace with hash -265907840, now seen corresponding path program 1 times [2024-06-27 21:24:42,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:42,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322189748] [2024-06-27 21:24:42,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:42,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:42,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:43,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:24:43,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:43,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322189748] [2024-06-27 21:24:43,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322189748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:43,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:43,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:24:43,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12180806] [2024-06-27 21:24:43,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:43,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:24:43,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:43,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:24:43,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:24:43,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-27 21:24:43,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 196 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:43,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:43,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-27 21:24:43,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:43,544 INFO L124 PetriNetUnfolderBase]: 1374/2068 cut-off events. [2024-06-27 21:24:43,545 INFO L125 PetriNetUnfolderBase]: For 1915/1923 co-relation queries the response was YES. [2024-06-27 21:24:43,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5859 conditions, 2068 events. 1374/2068 cut-off events. For 1915/1923 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9324 event pairs, 472 based on Foata normal form. 12/2078 useless extension candidates. Maximal degree in co-relation 5841. Up to 1980 conditions per place. [2024-06-27 21:24:43,553 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 54 selfloop transitions, 12 changer transitions 0/71 dead transitions. [2024-06-27 21:24:43,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 71 transitions, 402 flow [2024-06-27 21:24:43,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:24:43,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:24:43,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-27 21:24:43,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-27 21:24:43,558 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 196 flow. Second operand 6 states and 126 transitions. [2024-06-27 21:24:43,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 71 transitions, 402 flow [2024-06-27 21:24:43,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 71 transitions, 380 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 21:24:43,563 INFO L231 Difference]: Finished difference. Result has 52 places, 44 transitions, 215 flow [2024-06-27 21:24:43,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=215, PETRI_PLACES=52, PETRI_TRANSITIONS=44} [2024-06-27 21:24:43,564 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 11 predicate places. [2024-06-27 21:24:43,564 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 44 transitions, 215 flow [2024-06-27 21:24:43,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:43,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:43,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:24:43,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 21:24:43,565 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:24:43,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:43,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1195026544, now seen corresponding path program 1 times [2024-06-27 21:24:43,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:43,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066772792] [2024-06-27 21:24:43,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:43,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:43,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:44,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:24:44,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:44,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066772792] [2024-06-27 21:24:44,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066772792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:44,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:44,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:24:44,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658597635] [2024-06-27 21:24:44,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:44,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:24:44,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:44,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:24:44,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:24:44,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 21:24:44,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 44 transitions, 215 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:44,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:44,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 21:24:44,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:44,365 INFO L124 PetriNetUnfolderBase]: 1245/1901 cut-off events. [2024-06-27 21:24:44,366 INFO L125 PetriNetUnfolderBase]: For 2916/2940 co-relation queries the response was YES. [2024-06-27 21:24:44,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5680 conditions, 1901 events. 1245/1901 cut-off events. For 2916/2940 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 8786 event pairs, 585 based on Foata normal form. 4/1836 useless extension candidates. Maximal degree in co-relation 5660. Up to 1826 conditions per place. [2024-06-27 21:24:44,376 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 43 selfloop transitions, 10 changer transitions 0/62 dead transitions. [2024-06-27 21:24:44,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 62 transitions, 375 flow [2024-06-27 21:24:44,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:24:44,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:24:44,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-27 21:24:44,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 21:24:44,378 INFO L175 Difference]: Start difference. First operand has 52 places, 44 transitions, 215 flow. Second operand 5 states and 90 transitions. [2024-06-27 21:24:44,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 62 transitions, 375 flow [2024-06-27 21:24:44,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 62 transitions, 344 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 21:24:44,383 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 255 flow [2024-06-27 21:24:44,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=255, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2024-06-27 21:24:44,386 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 13 predicate places. [2024-06-27 21:24:44,386 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 255 flow [2024-06-27 21:24:44,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:44,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:44,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:24:44,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 21:24:44,390 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:24:44,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:44,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1608883590, now seen corresponding path program 1 times [2024-06-27 21:24:44,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:44,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276854527] [2024-06-27 21:24:44,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:44,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:44,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:44,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:24:44,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:44,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276854527] [2024-06-27 21:24:44,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276854527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:44,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:44,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:24:44,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810194136] [2024-06-27 21:24:44,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:44,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:24:44,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:44,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:24:44,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:24:45,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:24:45,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 255 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:45,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:45,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:24:45,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:45,403 INFO L124 PetriNetUnfolderBase]: 1476/2247 cut-off events. [2024-06-27 21:24:45,404 INFO L125 PetriNetUnfolderBase]: For 4593/4613 co-relation queries the response was YES. [2024-06-27 21:24:45,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7246 conditions, 2247 events. 1476/2247 cut-off events. For 4593/4613 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 10538 event pairs, 721 based on Foata normal form. 2/2214 useless extension candidates. Maximal degree in co-relation 7223. Up to 2148 conditions per place. [2024-06-27 21:24:45,416 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 55 selfloop transitions, 11 changer transitions 0/74 dead transitions. [2024-06-27 21:24:45,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 74 transitions, 473 flow [2024-06-27 21:24:45,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:24:45,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:24:45,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-27 21:24:45,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 21:24:45,419 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 255 flow. Second operand 6 states and 100 transitions. [2024-06-27 21:24:45,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 74 transitions, 473 flow [2024-06-27 21:24:45,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 74 transitions, 455 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 21:24:45,423 INFO L231 Difference]: Finished difference. Result has 60 places, 59 transitions, 337 flow [2024-06-27 21:24:45,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=337, PETRI_PLACES=60, PETRI_TRANSITIONS=59} [2024-06-27 21:24:45,426 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 19 predicate places. [2024-06-27 21:24:45,426 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 59 transitions, 337 flow [2024-06-27 21:24:45,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:45,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:45,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:24:45,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 21:24:45,427 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:24:45,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:45,427 INFO L85 PathProgramCache]: Analyzing trace with hash -611616827, now seen corresponding path program 1 times [2024-06-27 21:24:45,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:45,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606841151] [2024-06-27 21:24:45,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:45,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:45,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:45,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:24:45,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:45,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606841151] [2024-06-27 21:24:45,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606841151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:45,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:45,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:24:45,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041336138] [2024-06-27 21:24:45,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:45,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:24:45,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:45,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:24:45,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:24:45,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:24:45,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 59 transitions, 337 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:45,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:45,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:24:45,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:46,316 INFO L124 PetriNetUnfolderBase]: 1530/2300 cut-off events. [2024-06-27 21:24:46,316 INFO L125 PetriNetUnfolderBase]: For 5830/5860 co-relation queries the response was YES. [2024-06-27 21:24:46,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8111 conditions, 2300 events. 1530/2300 cut-off events. For 5830/5860 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 10466 event pairs, 699 based on Foata normal form. 14/2304 useless extension candidates. Maximal degree in co-relation 8084. Up to 2251 conditions per place. [2024-06-27 21:24:46,336 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 60 selfloop transitions, 13 changer transitions 0/80 dead transitions. [2024-06-27 21:24:46,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 80 transitions, 545 flow [2024-06-27 21:24:46,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:24:46,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:24:46,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-27 21:24:46,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42916666666666664 [2024-06-27 21:24:46,337 INFO L175 Difference]: Start difference. First operand has 60 places, 59 transitions, 337 flow. Second operand 6 states and 103 transitions. [2024-06-27 21:24:46,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 80 transitions, 545 flow [2024-06-27 21:24:46,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 80 transitions, 539 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-27 21:24:46,342 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 387 flow [2024-06-27 21:24:46,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=387, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2024-06-27 21:24:46,344 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 24 predicate places. [2024-06-27 21:24:46,344 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 387 flow [2024-06-27 21:24:46,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:46,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:46,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:24:46,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 21:24:46,344 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:24:46,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:46,345 INFO L85 PathProgramCache]: Analyzing trace with hash -639115067, now seen corresponding path program 2 times [2024-06-27 21:24:46,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:46,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318102920] [2024-06-27 21:24:46,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:46,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:46,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:46,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:24:46,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:46,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318102920] [2024-06-27 21:24:46,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318102920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:46,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:46,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:24:46,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584078715] [2024-06-27 21:24:46,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:46,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:24:46,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:46,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:24:46,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:24:46,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:24:46,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 387 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:46,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:46,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:24:46,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:47,306 INFO L124 PetriNetUnfolderBase]: 1554/2337 cut-off events. [2024-06-27 21:24:47,307 INFO L125 PetriNetUnfolderBase]: For 7850/7895 co-relation queries the response was YES. [2024-06-27 21:24:47,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8910 conditions, 2337 events. 1554/2337 cut-off events. For 7850/7895 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10665 event pairs, 702 based on Foata normal form. 15/2341 useless extension candidates. Maximal degree in co-relation 8880. Up to 2264 conditions per place. [2024-06-27 21:24:47,318 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 57 selfloop transitions, 19 changer transitions 0/83 dead transitions. [2024-06-27 21:24:47,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 83 transitions, 621 flow [2024-06-27 21:24:47,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:24:47,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:24:47,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-27 21:24:47,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-27 21:24:47,323 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 387 flow. Second operand 6 states and 102 transitions. [2024-06-27 21:24:47,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 83 transitions, 621 flow [2024-06-27 21:24:47,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 83 transitions, 589 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 21:24:47,329 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 467 flow [2024-06-27 21:24:47,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=467, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2024-06-27 21:24:47,331 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 27 predicate places. [2024-06-27 21:24:47,331 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 467 flow [2024-06-27 21:24:47,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:47,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:47,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:24:47,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 21:24:47,332 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:24:47,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:47,332 INFO L85 PathProgramCache]: Analyzing trace with hash -639107131, now seen corresponding path program 1 times [2024-06-27 21:24:47,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:47,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071104483] [2024-06-27 21:24:47,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:47,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:47,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:48,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:24:48,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:48,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071104483] [2024-06-27 21:24:48,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071104483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:48,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:48,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:24:48,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100264723] [2024-06-27 21:24:48,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:48,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:24:48,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:48,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:24:48,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:24:48,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:24:48,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 68 transitions, 467 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:48,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:48,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:24:48,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:48,474 INFO L124 PetriNetUnfolderBase]: 1573/2375 cut-off events. [2024-06-27 21:24:48,474 INFO L125 PetriNetUnfolderBase]: For 11274/11359 co-relation queries the response was YES. [2024-06-27 21:24:48,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9462 conditions, 2375 events. 1573/2375 cut-off events. For 11274/11359 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 11148 event pairs, 970 based on Foata normal form. 2/2313 useless extension candidates. Maximal degree in co-relation 9430. Up to 2267 conditions per place. [2024-06-27 21:24:48,485 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 64 selfloop transitions, 16 changer transitions 0/91 dead transitions. [2024-06-27 21:24:48,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 91 transitions, 702 flow [2024-06-27 21:24:48,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:24:48,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:24:48,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-27 21:24:48,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-06-27 21:24:48,487 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 467 flow. Second operand 8 states and 124 transitions. [2024-06-27 21:24:48,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 91 transitions, 702 flow [2024-06-27 21:24:48,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 91 transitions, 658 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-27 21:24:48,496 INFO L231 Difference]: Finished difference. Result has 74 places, 73 transitions, 503 flow [2024-06-27 21:24:48,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=503, PETRI_PLACES=74, PETRI_TRANSITIONS=73} [2024-06-27 21:24:48,497 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 33 predicate places. [2024-06-27 21:24:48,497 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 73 transitions, 503 flow [2024-06-27 21:24:48,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:48,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:48,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:24:48,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 21:24:48,498 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:24:48,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:48,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1014233227, now seen corresponding path program 1 times [2024-06-27 21:24:48,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:48,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745008365] [2024-06-27 21:24:48,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:48,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:48,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:48,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:24:48,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:48,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745008365] [2024-06-27 21:24:48,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745008365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:48,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:48,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:24:48,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432268250] [2024-06-27 21:24:48,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:48,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:24:48,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:48,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:24:48,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:24:49,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:24:49,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 73 transitions, 503 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:49,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:49,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:24:49,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:49,477 INFO L124 PetriNetUnfolderBase]: 1576/2381 cut-off events. [2024-06-27 21:24:49,477 INFO L125 PetriNetUnfolderBase]: For 12911/12997 co-relation queries the response was YES. [2024-06-27 21:24:49,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10050 conditions, 2381 events. 1576/2381 cut-off events. For 12911/12997 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 11118 event pairs, 576 based on Foata normal form. 32/2359 useless extension candidates. Maximal degree in co-relation 10016. Up to 2235 conditions per place. [2024-06-27 21:24:49,491 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 79 selfloop transitions, 25 changer transitions 0/112 dead transitions. [2024-06-27 21:24:49,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 112 transitions, 835 flow [2024-06-27 21:24:49,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:24:49,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:24:49,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 21:24:49,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434375 [2024-06-27 21:24:49,493 INFO L175 Difference]: Start difference. First operand has 74 places, 73 transitions, 503 flow. Second operand 8 states and 139 transitions. [2024-06-27 21:24:49,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 112 transitions, 835 flow [2024-06-27 21:24:49,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 112 transitions, 801 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 21:24:49,502 INFO L231 Difference]: Finished difference. Result has 79 places, 84 transitions, 600 flow [2024-06-27 21:24:49,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=600, PETRI_PLACES=79, PETRI_TRANSITIONS=84} [2024-06-27 21:24:49,503 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 38 predicate places. [2024-06-27 21:24:49,505 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 84 transitions, 600 flow [2024-06-27 21:24:49,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:49,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:49,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:24:49,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 21:24:49,505 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:24:49,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:49,506 INFO L85 PathProgramCache]: Analyzing trace with hash 2016706347, now seen corresponding path program 2 times [2024-06-27 21:24:49,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:49,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70230385] [2024-06-27 21:24:49,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:49,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:49,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:50,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:24:50,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:50,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70230385] [2024-06-27 21:24:50,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70230385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:50,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:50,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:24:50,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253809345] [2024-06-27 21:24:50,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:50,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:24:50,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:50,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:24:50,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:24:50,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:24:50,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 84 transitions, 600 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:50,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:50,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:24:50,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:50,478 INFO L124 PetriNetUnfolderBase]: 1637/2473 cut-off events. [2024-06-27 21:24:50,478 INFO L125 PetriNetUnfolderBase]: For 16555/16688 co-relation queries the response was YES. [2024-06-27 21:24:50,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11394 conditions, 2473 events. 1637/2473 cut-off events. For 16555/16688 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 11530 event pairs, 553 based on Foata normal form. 42/2460 useless extension candidates. Maximal degree in co-relation 11357. Up to 2283 conditions per place. [2024-06-27 21:24:50,493 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 83 selfloop transitions, 39 changer transitions 0/130 dead transitions. [2024-06-27 21:24:50,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 130 transitions, 1083 flow [2024-06-27 21:24:50,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:24:50,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:24:50,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 21:24:50,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 21:24:50,495 INFO L175 Difference]: Start difference. First operand has 79 places, 84 transitions, 600 flow. Second operand 8 states and 140 transitions. [2024-06-27 21:24:50,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 130 transitions, 1083 flow [2024-06-27 21:24:50,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 130 transitions, 1014 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-27 21:24:50,507 INFO L231 Difference]: Finished difference. Result has 87 places, 105 transitions, 841 flow [2024-06-27 21:24:50,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=558, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=841, PETRI_PLACES=87, PETRI_TRANSITIONS=105} [2024-06-27 21:24:50,508 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 46 predicate places. [2024-06-27 21:24:50,508 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 105 transitions, 841 flow [2024-06-27 21:24:50,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:50,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:50,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:24:50,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 21:24:50,509 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:24:50,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:50,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1983643173, now seen corresponding path program 1 times [2024-06-27 21:24:50,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:50,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954609938] [2024-06-27 21:24:50,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:50,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:50,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:51,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:24:51,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:51,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954609938] [2024-06-27 21:24:51,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954609938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:51,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:51,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:24:51,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463772979] [2024-06-27 21:24:51,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:51,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:24:51,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:51,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:24:51,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:24:51,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:24:51,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 105 transitions, 841 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:51,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:51,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:24:51,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:51,515 INFO L124 PetriNetUnfolderBase]: 1791/2684 cut-off events. [2024-06-27 21:24:51,516 INFO L125 PetriNetUnfolderBase]: For 18644/18644 co-relation queries the response was YES. [2024-06-27 21:24:51,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12776 conditions, 2684 events. 1791/2684 cut-off events. For 18644/18644 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12412 event pairs, 826 based on Foata normal form. 2/2685 useless extension candidates. Maximal degree in co-relation 12735. Up to 2619 conditions per place. [2024-06-27 21:24:51,533 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 120 selfloop transitions, 20 changer transitions 0/143 dead transitions. [2024-06-27 21:24:51,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 143 transitions, 1319 flow [2024-06-27 21:24:51,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:24:51,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:24:51,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-27 21:24:51,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-06-27 21:24:51,534 INFO L175 Difference]: Start difference. First operand has 87 places, 105 transitions, 841 flow. Second operand 8 states and 127 transitions. [2024-06-27 21:24:51,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 143 transitions, 1319 flow [2024-06-27 21:24:51,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 143 transitions, 1262 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-27 21:24:51,550 INFO L231 Difference]: Finished difference. Result has 95 places, 119 transitions, 988 flow [2024-06-27 21:24:51,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=788, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=988, PETRI_PLACES=95, PETRI_TRANSITIONS=119} [2024-06-27 21:24:51,551 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 54 predicate places. [2024-06-27 21:24:51,551 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 119 transitions, 988 flow [2024-06-27 21:24:51,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:51,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:51,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:24:51,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 21:24:51,552 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:24:51,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:51,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1458916289, now seen corresponding path program 3 times [2024-06-27 21:24:51,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:51,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870475016] [2024-06-27 21:24:51,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:51,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:51,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:52,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:24:52,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:52,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870475016] [2024-06-27 21:24:52,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870475016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:52,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:52,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:24:52,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415910366] [2024-06-27 21:24:52,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:52,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:24:52,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:52,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:24:52,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:24:52,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:24:52,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 119 transitions, 988 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:52,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:52,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:24:52,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:52,577 INFO L124 PetriNetUnfolderBase]: 1721/2604 cut-off events. [2024-06-27 21:24:52,577 INFO L125 PetriNetUnfolderBase]: For 24438/24530 co-relation queries the response was YES. [2024-06-27 21:24:52,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13310 conditions, 2604 events. 1721/2604 cut-off events. For 24438/24530 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 12186 event pairs, 535 based on Foata normal form. 45/2594 useless extension candidates. Maximal degree in co-relation 13265. Up to 2329 conditions per place. [2024-06-27 21:24:52,594 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 90 selfloop transitions, 54 changer transitions 0/156 dead transitions. [2024-06-27 21:24:52,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 156 transitions, 1513 flow [2024-06-27 21:24:52,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:24:52,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:24:52,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 21:24:52,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.446875 [2024-06-27 21:24:52,596 INFO L175 Difference]: Start difference. First operand has 95 places, 119 transitions, 988 flow. Second operand 8 states and 143 transitions. [2024-06-27 21:24:52,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 156 transitions, 1513 flow [2024-06-27 21:24:52,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 156 transitions, 1476 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-27 21:24:52,614 INFO L231 Difference]: Finished difference. Result has 102 places, 128 transitions, 1196 flow [2024-06-27 21:24:52,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=951, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1196, PETRI_PLACES=102, PETRI_TRANSITIONS=128} [2024-06-27 21:24:52,614 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 61 predicate places. [2024-06-27 21:24:52,615 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 128 transitions, 1196 flow [2024-06-27 21:24:52,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:52,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:52,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:24:52,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 21:24:52,615 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:24:52,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:52,616 INFO L85 PathProgramCache]: Analyzing trace with hash -163566649, now seen corresponding path program 4 times [2024-06-27 21:24:52,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:52,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775203445] [2024-06-27 21:24:52,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:52,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:52,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:53,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:24:53,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:53,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775203445] [2024-06-27 21:24:53,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775203445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:53,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:53,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:24:53,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473042265] [2024-06-27 21:24:53,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:53,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:24:53,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:53,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:24:53,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:24:53,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:24:53,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 128 transitions, 1196 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:53,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:53,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:24:53,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:53,669 INFO L124 PetriNetUnfolderBase]: 1704/2582 cut-off events. [2024-06-27 21:24:53,670 INFO L125 PetriNetUnfolderBase]: For 29754/29895 co-relation queries the response was YES. [2024-06-27 21:24:53,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14049 conditions, 2582 events. 1704/2582 cut-off events. For 29754/29895 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12108 event pairs, 566 based on Foata normal form. 54/2579 useless extension candidates. Maximal degree in co-relation 14001. Up to 2335 conditions per place. [2024-06-27 21:24:53,688 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 94 selfloop transitions, 48 changer transitions 0/154 dead transitions. [2024-06-27 21:24:53,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 154 transitions, 1600 flow [2024-06-27 21:24:53,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:24:53,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:24:53,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 21:24:53,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392857142857143 [2024-06-27 21:24:53,690 INFO L175 Difference]: Start difference. First operand has 102 places, 128 transitions, 1196 flow. Second operand 7 states and 123 transitions. [2024-06-27 21:24:53,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 154 transitions, 1600 flow [2024-06-27 21:24:53,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 154 transitions, 1524 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 21:24:53,715 INFO L231 Difference]: Finished difference. Result has 105 places, 131 transitions, 1282 flow [2024-06-27 21:24:53,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1120, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1282, PETRI_PLACES=105, PETRI_TRANSITIONS=131} [2024-06-27 21:24:53,716 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 64 predicate places. [2024-06-27 21:24:53,716 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 131 transitions, 1282 flow [2024-06-27 21:24:53,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:53,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:53,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:24:53,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 21:24:53,717 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:24:53,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:53,717 INFO L85 PathProgramCache]: Analyzing trace with hash -228447865, now seen corresponding path program 2 times [2024-06-27 21:24:53,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:53,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534326659] [2024-06-27 21:24:53,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:53,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:53,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:54,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:24:54,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:54,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534326659] [2024-06-27 21:24:54,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534326659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:54,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:54,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:24:54,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365236161] [2024-06-27 21:24:54,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:54,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:24:54,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:54,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:24:54,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:24:54,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:24:54,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 131 transitions, 1282 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:54,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:54,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:24:54,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:54,724 INFO L124 PetriNetUnfolderBase]: 1895/2833 cut-off events. [2024-06-27 21:24:54,725 INFO L125 PetriNetUnfolderBase]: For 31733/31735 co-relation queries the response was YES. [2024-06-27 21:24:54,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15760 conditions, 2833 events. 1895/2833 cut-off events. For 31733/31735 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13139 event pairs, 823 based on Foata normal form. 4/2836 useless extension candidates. Maximal degree in co-relation 15710. Up to 2750 conditions per place. [2024-06-27 21:24:54,745 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 130 selfloop transitions, 24 changer transitions 0/157 dead transitions. [2024-06-27 21:24:54,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 157 transitions, 1708 flow [2024-06-27 21:24:54,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:24:54,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:24:54,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-27 21:24:54,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 21:24:54,747 INFO L175 Difference]: Start difference. First operand has 105 places, 131 transitions, 1282 flow. Second operand 7 states and 112 transitions. [2024-06-27 21:24:54,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 157 transitions, 1708 flow [2024-06-27 21:24:54,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 157 transitions, 1612 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 21:24:54,776 INFO L231 Difference]: Finished difference. Result has 108 places, 137 transitions, 1314 flow [2024-06-27 21:24:54,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1186, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1314, PETRI_PLACES=108, PETRI_TRANSITIONS=137} [2024-06-27 21:24:54,777 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 67 predicate places. [2024-06-27 21:24:54,777 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 137 transitions, 1314 flow [2024-06-27 21:24:54,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:54,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:54,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:24:54,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 21:24:54,778 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)] === [2024-06-27 21:24:54,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:54,778 INFO L85 PathProgramCache]: Analyzing trace with hash -228448051, now seen corresponding path program 5 times [2024-06-27 21:24:54,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:54,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255168930] [2024-06-27 21:24:54,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:54,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:54,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:55,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:24:55,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:55,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255168930] [2024-06-27 21:24:55,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255168930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:55,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:55,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:24:55,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324563153] [2024-06-27 21:24:55,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:55,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:24:55,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:55,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:24:55,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:24:55,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:24:55,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 137 transitions, 1314 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:55,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:55,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:24:55,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:55,766 INFO L124 PetriNetUnfolderBase]: 1796/2714 cut-off events. [2024-06-27 21:24:55,767 INFO L125 PetriNetUnfolderBase]: For 38840/38948 co-relation queries the response was YES. [2024-06-27 21:24:55,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16020 conditions, 2714 events. 1796/2714 cut-off events. For 38840/38948 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 12723 event pairs, 537 based on Foata normal form. 51/2707 useless extension candidates. Maximal degree in co-relation 15968. Up to 2371 conditions per place. [2024-06-27 21:24:55,786 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 91 selfloop transitions, 62 changer transitions 0/167 dead transitions. [2024-06-27 21:24:55,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 167 transitions, 1856 flow [2024-06-27 21:24:55,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:24:55,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:24:55,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-27 21:24:55,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-27 21:24:55,787 INFO L175 Difference]: Start difference. First operand has 108 places, 137 transitions, 1314 flow. Second operand 7 states and 125 transitions. [2024-06-27 21:24:55,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 167 transitions, 1856 flow [2024-06-27 21:24:55,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 167 transitions, 1811 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 21:24:55,824 INFO L231 Difference]: Finished difference. Result has 112 places, 143 transitions, 1509 flow [2024-06-27 21:24:55,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1273, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1509, PETRI_PLACES=112, PETRI_TRANSITIONS=143} [2024-06-27 21:24:55,825 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 71 predicate places. [2024-06-27 21:24:55,825 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 143 transitions, 1509 flow [2024-06-27 21:24:55,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:55,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:55,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:24:55,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 21:24:55,826 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:24:55,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:55,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1662507343, now seen corresponding path program 3 times [2024-06-27 21:24:55,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:55,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491266681] [2024-06-27 21:24:55,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:55,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:55,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:56,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:24:56,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:56,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491266681] [2024-06-27 21:24:56,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491266681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:56,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:56,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:24:56,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917878086] [2024-06-27 21:24:56,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:56,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:24:56,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:56,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:24:56,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:24:56,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:24:56,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 143 transitions, 1509 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:56,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:56,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:24:56,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:56,885 INFO L124 PetriNetUnfolderBase]: 1962/2932 cut-off events. [2024-06-27 21:24:56,885 INFO L125 PetriNetUnfolderBase]: For 38435/38439 co-relation queries the response was YES. [2024-06-27 21:24:56,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17136 conditions, 2932 events. 1962/2932 cut-off events. For 38435/38439 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 13682 event pairs, 836 based on Foata normal form. 6/2936 useless extension candidates. Maximal degree in co-relation 17082. Up to 2799 conditions per place. [2024-06-27 21:24:56,902 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 133 selfloop transitions, 36 changer transitions 0/172 dead transitions. [2024-06-27 21:24:56,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 172 transitions, 2039 flow [2024-06-27 21:24:56,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:24:56,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:24:56,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-27 21:24:56,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-06-27 21:24:56,904 INFO L175 Difference]: Start difference. First operand has 112 places, 143 transitions, 1509 flow. Second operand 7 states and 114 transitions. [2024-06-27 21:24:56,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 172 transitions, 2039 flow [2024-06-27 21:24:56,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 172 transitions, 1954 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-27 21:24:56,937 INFO L231 Difference]: Finished difference. Result has 116 places, 152 transitions, 1598 flow [2024-06-27 21:24:56,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1428, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1598, PETRI_PLACES=116, PETRI_TRANSITIONS=152} [2024-06-27 21:24:56,938 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 75 predicate places. [2024-06-27 21:24:56,938 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 152 transitions, 1598 flow [2024-06-27 21:24:56,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:56,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:56,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:24:56,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 21:24:56,939 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:24:56,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:56,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1662270193, now seen corresponding path program 4 times [2024-06-27 21:24:56,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:56,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032756889] [2024-06-27 21:24:56,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:56,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:56,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:57,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:24:57,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:57,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032756889] [2024-06-27 21:24:57,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032756889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:57,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:57,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:24:57,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211149440] [2024-06-27 21:24:57,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:57,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:24:57,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:57,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:24:57,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:24:57,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:24:57,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 152 transitions, 1598 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:57,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:57,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:24:57,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:57,940 INFO L124 PetriNetUnfolderBase]: 1957/2925 cut-off events. [2024-06-27 21:24:57,940 INFO L125 PetriNetUnfolderBase]: For 36663/36667 co-relation queries the response was YES. [2024-06-27 21:24:57,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17130 conditions, 2925 events. 1957/2925 cut-off events. For 36663/36667 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 13620 event pairs, 836 based on Foata normal form. 6/2929 useless extension candidates. Maximal degree in co-relation 17074. Up to 2794 conditions per place. [2024-06-27 21:24:57,959 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 133 selfloop transitions, 34 changer transitions 0/170 dead transitions. [2024-06-27 21:24:57,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 170 transitions, 1994 flow [2024-06-27 21:24:57,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:24:57,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:24:57,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-27 21:24:57,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2024-06-27 21:24:57,961 INFO L175 Difference]: Start difference. First operand has 116 places, 152 transitions, 1598 flow. Second operand 7 states and 113 transitions. [2024-06-27 21:24:57,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 170 transitions, 1994 flow [2024-06-27 21:24:57,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 170 transitions, 1951 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-27 21:24:57,998 INFO L231 Difference]: Finished difference. Result has 121 places, 152 transitions, 1631 flow [2024-06-27 21:24:57,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1555, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1631, PETRI_PLACES=121, PETRI_TRANSITIONS=152} [2024-06-27 21:24:57,998 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 80 predicate places. [2024-06-27 21:24:57,999 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 152 transitions, 1631 flow [2024-06-27 21:24:57,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:57,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:57,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:24:57,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 21:24:57,999 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:24:58,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:58,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1662270007, now seen corresponding path program 6 times [2024-06-27 21:24:58,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:58,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4803706] [2024-06-27 21:24:58,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:58,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:58,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:58,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:24:58,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:58,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4803706] [2024-06-27 21:24:58,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4803706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:58,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:58,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:24:58,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699161649] [2024-06-27 21:24:58,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:58,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:24:58,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:58,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:24:58,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:24:58,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:24:58,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 152 transitions, 1631 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:58,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:58,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:24:58,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:59,044 INFO L124 PetriNetUnfolderBase]: 1807/2732 cut-off events. [2024-06-27 21:24:59,044 INFO L125 PetriNetUnfolderBase]: For 41825/41923 co-relation queries the response was YES. [2024-06-27 21:24:59,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16491 conditions, 2732 events. 1807/2732 cut-off events. For 41825/41923 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12798 event pairs, 557 based on Foata normal form. 52/2719 useless extension candidates. Maximal degree in co-relation 16433. Up to 2329 conditions per place. [2024-06-27 21:24:59,063 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 92 selfloop transitions, 68 changer transitions 0/177 dead transitions. [2024-06-27 21:24:59,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 177 transitions, 2139 flow [2024-06-27 21:24:59,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:24:59,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:24:59,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-27 21:24:59,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-27 21:24:59,066 INFO L175 Difference]: Start difference. First operand has 121 places, 152 transitions, 1631 flow. Second operand 7 states and 124 transitions. [2024-06-27 21:24:59,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 177 transitions, 2139 flow [2024-06-27 21:24:59,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 177 transitions, 2027 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 21:24:59,103 INFO L231 Difference]: Finished difference. Result has 121 places, 155 transitions, 1716 flow [2024-06-27 21:24:59,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1519, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1716, PETRI_PLACES=121, PETRI_TRANSITIONS=155} [2024-06-27 21:24:59,104 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 80 predicate places. [2024-06-27 21:24:59,104 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 155 transitions, 1716 flow [2024-06-27 21:24:59,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:24:59,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:59,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:24:59,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 21:24:59,105 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:24:59,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:59,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1662516271, now seen corresponding path program 1 times [2024-06-27 21:24:59,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:59,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341590302] [2024-06-27 21:24:59,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:59,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:59,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:59,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:24:59,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:59,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341590302] [2024-06-27 21:24:59,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341590302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:59,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:59,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:24:59,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58219749] [2024-06-27 21:24:59,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:59,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:24:59,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:59,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:24:59,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:25:00,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:25:00,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 155 transitions, 1716 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:00,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:00,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:25:00,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:00,570 INFO L124 PetriNetUnfolderBase]: 1886/2844 cut-off events. [2024-06-27 21:25:00,570 INFO L125 PetriNetUnfolderBase]: For 47923/48120 co-relation queries the response was YES. [2024-06-27 21:25:00,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17419 conditions, 2844 events. 1886/2844 cut-off events. For 47923/48120 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 13582 event pairs, 814 based on Foata normal form. 10/2793 useless extension candidates. Maximal degree in co-relation 17362. Up to 2676 conditions per place. [2024-06-27 21:25:00,587 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 136 selfloop transitions, 17 changer transitions 0/180 dead transitions. [2024-06-27 21:25:00,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 180 transitions, 2116 flow [2024-06-27 21:25:00,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:25:00,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:25:00,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 21:25:00,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-27 21:25:00,588 INFO L175 Difference]: Start difference. First operand has 121 places, 155 transitions, 1716 flow. Second operand 8 states and 130 transitions. [2024-06-27 21:25:00,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 180 transitions, 2116 flow [2024-06-27 21:25:00,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 180 transitions, 1945 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 21:25:00,627 INFO L231 Difference]: Finished difference. Result has 124 places, 157 transitions, 1606 flow [2024-06-27 21:25:00,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1545, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1606, PETRI_PLACES=124, PETRI_TRANSITIONS=157} [2024-06-27 21:25:00,628 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 83 predicate places. [2024-06-27 21:25:00,628 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 157 transitions, 1606 flow [2024-06-27 21:25:00,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:00,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:00,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:25:00,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 21:25:00,629 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:25:00,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:00,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1785116638, now seen corresponding path program 1 times [2024-06-27 21:25:00,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:00,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031548364] [2024-06-27 21:25:00,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:00,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:00,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:01,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:25:01,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:01,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031548364] [2024-06-27 21:25:01,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031548364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:01,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:01,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:25:01,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918702843] [2024-06-27 21:25:01,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:01,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:25:01,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:01,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:25:01,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:25:01,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:25:01,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 157 transitions, 1606 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:01,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:01,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:25:01,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:01,830 INFO L124 PetriNetUnfolderBase]: 1798/2723 cut-off events. [2024-06-27 21:25:01,830 INFO L125 PetriNetUnfolderBase]: For 49506/49676 co-relation queries the response was YES. [2024-06-27 21:25:01,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16813 conditions, 2723 events. 1798/2723 cut-off events. For 49506/49676 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12768 event pairs, 706 based on Foata normal form. 46/2721 useless extension candidates. Maximal degree in co-relation 16755. Up to 2472 conditions per place. [2024-06-27 21:25:01,849 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 123 selfloop transitions, 50 changer transitions 0/191 dead transitions. [2024-06-27 21:25:01,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 191 transitions, 2129 flow [2024-06-27 21:25:01,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:25:01,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:25:01,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 21:25:01,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 21:25:01,850 INFO L175 Difference]: Start difference. First operand has 124 places, 157 transitions, 1606 flow. Second operand 8 states and 140 transitions. [2024-06-27 21:25:01,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 191 transitions, 2129 flow [2024-06-27 21:25:01,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 191 transitions, 2086 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 21:25:01,891 INFO L231 Difference]: Finished difference. Result has 127 places, 164 transitions, 1792 flow [2024-06-27 21:25:01,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1563, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1792, PETRI_PLACES=127, PETRI_TRANSITIONS=164} [2024-06-27 21:25:01,892 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 86 predicate places. [2024-06-27 21:25:01,892 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 164 transitions, 1792 flow [2024-06-27 21:25:01,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:01,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:01,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:25:01,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 21:25:01,892 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:25:01,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:01,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1376496025, now seen corresponding path program 1 times [2024-06-27 21:25:01,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:01,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708177355] [2024-06-27 21:25:01,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:01,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:01,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:02,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:25:02,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:02,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708177355] [2024-06-27 21:25:02,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708177355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:02,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:02,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:25:02,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151437007] [2024-06-27 21:25:02,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:02,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:25:02,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:02,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:25:02,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:25:02,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:25:02,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 164 transitions, 1792 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:02,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:02,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:25:02,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:02,870 INFO L124 PetriNetUnfolderBase]: 1988/2962 cut-off events. [2024-06-27 21:25:02,870 INFO L125 PetriNetUnfolderBase]: For 49650/49652 co-relation queries the response was YES. [2024-06-27 21:25:02,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18435 conditions, 2962 events. 1988/2962 cut-off events. For 49650/49652 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13640 event pairs, 602 based on Foata normal form. 6/2967 useless extension candidates. Maximal degree in co-relation 18375. Up to 2791 conditions per place. [2024-06-27 21:25:02,894 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 178 selfloop transitions, 40 changer transitions 0/221 dead transitions. [2024-06-27 21:25:02,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 221 transitions, 2658 flow [2024-06-27 21:25:02,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:25:02,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:25:02,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-27 21:25:02,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-06-27 21:25:02,895 INFO L175 Difference]: Start difference. First operand has 127 places, 164 transitions, 1792 flow. Second operand 9 states and 147 transitions. [2024-06-27 21:25:02,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 221 transitions, 2658 flow [2024-06-27 21:25:02,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 221 transitions, 2541 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 21:25:02,942 INFO L231 Difference]: Finished difference. Result has 135 places, 189 transitions, 2158 flow [2024-06-27 21:25:02,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1696, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2158, PETRI_PLACES=135, PETRI_TRANSITIONS=189} [2024-06-27 21:25:02,943 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 94 predicate places. [2024-06-27 21:25:02,943 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 189 transitions, 2158 flow [2024-06-27 21:25:02,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:02,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:02,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:25:02,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 21:25:02,944 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:25:02,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:02,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1077371332, now seen corresponding path program 2 times [2024-06-27 21:25:02,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:02,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912360323] [2024-06-27 21:25:02,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:02,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:02,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:03,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:25:03,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:03,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912360323] [2024-06-27 21:25:03,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912360323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:03,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:03,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:25:03,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279990655] [2024-06-27 21:25:03,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:03,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:25:03,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:03,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:25:03,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:25:03,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:25:03,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 189 transitions, 2158 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:03,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:03,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:25:03,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:04,337 INFO L124 PetriNetUnfolderBase]: 1877/2835 cut-off events. [2024-06-27 21:25:04,338 INFO L125 PetriNetUnfolderBase]: For 59018/59117 co-relation queries the response was YES. [2024-06-27 21:25:04,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18828 conditions, 2835 events. 1877/2835 cut-off events. For 59018/59117 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13397 event pairs, 519 based on Foata normal form. 27/2794 useless extension candidates. Maximal degree in co-relation 18763. Up to 2547 conditions per place. [2024-06-27 21:25:04,357 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 131 selfloop transitions, 68 changer transitions 0/222 dead transitions. [2024-06-27 21:25:04,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 222 transitions, 2750 flow [2024-06-27 21:25:04,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:25:04,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:25:04,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 21:25:04,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440625 [2024-06-27 21:25:04,359 INFO L175 Difference]: Start difference. First operand has 135 places, 189 transitions, 2158 flow. Second operand 8 states and 141 transitions. [2024-06-27 21:25:04,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 222 transitions, 2750 flow [2024-06-27 21:25:04,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 222 transitions, 2687 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-27 21:25:04,425 INFO L231 Difference]: Finished difference. Result has 141 places, 197 transitions, 2367 flow [2024-06-27 21:25:04,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2095, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2367, PETRI_PLACES=141, PETRI_TRANSITIONS=197} [2024-06-27 21:25:04,425 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 100 predicate places. [2024-06-27 21:25:04,425 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 197 transitions, 2367 flow [2024-06-27 21:25:04,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:04,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:04,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:25:04,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 21:25:04,426 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:25:04,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:04,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1359672173, now seen corresponding path program 2 times [2024-06-27 21:25:04,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:04,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396995214] [2024-06-27 21:25:04,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:04,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:04,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:04,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:25:04,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:04,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396995214] [2024-06-27 21:25:04,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396995214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:04,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:04,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:25:04,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519598195] [2024-06-27 21:25:04,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:04,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:25:04,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:04,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:25:04,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:25:05,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:25:05,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 197 transitions, 2367 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:05,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:05,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:25:05,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:05,691 INFO L124 PetriNetUnfolderBase]: 2040/3037 cut-off events. [2024-06-27 21:25:05,691 INFO L125 PetriNetUnfolderBase]: For 59598/59604 co-relation queries the response was YES. [2024-06-27 21:25:05,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19864 conditions, 3037 events. 2040/3037 cut-off events. For 59598/59604 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 14005 event pairs, 572 based on Foata normal form. 10/3046 useless extension candidates. Maximal degree in co-relation 19797. Up to 2857 conditions per place. [2024-06-27 21:25:05,715 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 188 selfloop transitions, 49 changer transitions 0/240 dead transitions. [2024-06-27 21:25:05,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 240 transitions, 3068 flow [2024-06-27 21:25:05,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:25:05,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:25:05,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-27 21:25:05,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4111111111111111 [2024-06-27 21:25:05,717 INFO L175 Difference]: Start difference. First operand has 141 places, 197 transitions, 2367 flow. Second operand 9 states and 148 transitions. [2024-06-27 21:25:05,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 240 transitions, 3068 flow [2024-06-27 21:25:05,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 240 transitions, 2983 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 21:25:05,772 INFO L231 Difference]: Finished difference. Result has 147 places, 210 transitions, 2533 flow [2024-06-27 21:25:05,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2284, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2533, PETRI_PLACES=147, PETRI_TRANSITIONS=210} [2024-06-27 21:25:05,772 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 106 predicate places. [2024-06-27 21:25:05,772 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 210 transitions, 2533 flow [2024-06-27 21:25:05,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:05,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:05,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:25:05,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 21:25:05,773 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:25:05,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:05,773 INFO L85 PathProgramCache]: Analyzing trace with hash -993126197, now seen corresponding path program 3 times [2024-06-27 21:25:05,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:05,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552822475] [2024-06-27 21:25:05,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:05,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:05,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:06,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:25:06,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:06,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552822475] [2024-06-27 21:25:06,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552822475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:06,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:06,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:25:06,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554133723] [2024-06-27 21:25:06,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:06,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:25:06,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:06,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:25:06,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:25:06,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:25:06,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 210 transitions, 2533 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:06,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:06,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:25:06,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:06,886 INFO L124 PetriNetUnfolderBase]: 2190/3254 cut-off events. [2024-06-27 21:25:06,886 INFO L125 PetriNetUnfolderBase]: For 70608/70610 co-relation queries the response was YES. [2024-06-27 21:25:06,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22003 conditions, 3254 events. 2190/3254 cut-off events. For 70608/70610 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 15088 event pairs, 525 based on Foata normal form. 6/3259 useless extension candidates. Maximal degree in co-relation 21934. Up to 2794 conditions per place. [2024-06-27 21:25:06,917 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 196 selfloop transitions, 66 changer transitions 0/265 dead transitions. [2024-06-27 21:25:06,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 265 transitions, 3613 flow [2024-06-27 21:25:06,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:25:06,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:25:06,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 21:25:06,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4361111111111111 [2024-06-27 21:25:06,919 INFO L175 Difference]: Start difference. First operand has 147 places, 210 transitions, 2533 flow. Second operand 9 states and 157 transitions. [2024-06-27 21:25:06,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 265 transitions, 3613 flow [2024-06-27 21:25:07,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 265 transitions, 3576 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-27 21:25:07,014 INFO L231 Difference]: Finished difference. Result has 156 places, 226 transitions, 2892 flow [2024-06-27 21:25:07,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2496, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2892, PETRI_PLACES=156, PETRI_TRANSITIONS=226} [2024-06-27 21:25:07,014 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 115 predicate places. [2024-06-27 21:25:07,015 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 226 transitions, 2892 flow [2024-06-27 21:25:07,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:07,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:07,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:25:07,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 21:25:07,015 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:25:07,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:07,016 INFO L85 PathProgramCache]: Analyzing trace with hash -993120400, now seen corresponding path program 1 times [2024-06-27 21:25:07,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:07,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269446217] [2024-06-27 21:25:07,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:07,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:07,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:07,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:25:07,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:07,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269446217] [2024-06-27 21:25:07,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269446217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:07,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:07,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:25:07,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621393630] [2024-06-27 21:25:07,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:07,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:25:07,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:07,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:25:07,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:25:07,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:25:07,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 226 transitions, 2892 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:07,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:07,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:25:07,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:08,284 INFO L124 PetriNetUnfolderBase]: 2185/3253 cut-off events. [2024-06-27 21:25:08,284 INFO L125 PetriNetUnfolderBase]: For 78699/78703 co-relation queries the response was YES. [2024-06-27 21:25:08,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23324 conditions, 3253 events. 2185/3253 cut-off events. For 78699/78703 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 15227 event pairs, 793 based on Foata normal form. 6/3258 useless extension candidates. Maximal degree in co-relation 23251. Up to 3178 conditions per place. [2024-06-27 21:25:08,312 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 230 selfloop transitions, 23 changer transitions 0/256 dead transitions. [2024-06-27 21:25:08,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 256 transitions, 3524 flow [2024-06-27 21:25:08,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:25:08,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:25:08,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-27 21:25:08,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39166666666666666 [2024-06-27 21:25:08,321 INFO L175 Difference]: Start difference. First operand has 156 places, 226 transitions, 2892 flow. Second operand 9 states and 141 transitions. [2024-06-27 21:25:08,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 256 transitions, 3524 flow [2024-06-27 21:25:08,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 256 transitions, 3433 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-27 21:25:08,421 INFO L231 Difference]: Finished difference. Result has 161 places, 228 transitions, 2881 flow [2024-06-27 21:25:08,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2801, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2881, PETRI_PLACES=161, PETRI_TRANSITIONS=228} [2024-06-27 21:25:08,422 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 120 predicate places. [2024-06-27 21:25:08,422 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 228 transitions, 2881 flow [2024-06-27 21:25:08,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:08,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:08,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:25:08,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 21:25:08,423 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:25:08,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:08,423 INFO L85 PathProgramCache]: Analyzing trace with hash -2018228927, now seen corresponding path program 4 times [2024-06-27 21:25:08,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:08,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859878865] [2024-06-27 21:25:08,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:08,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:08,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:08,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:25:08,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:08,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859878865] [2024-06-27 21:25:08,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859878865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:08,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:08,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:25:08,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977239617] [2024-06-27 21:25:08,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:08,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:25:08,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:08,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:25:08,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:25:09,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:25:09,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 228 transitions, 2881 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:09,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:09,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:25:09,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:09,603 INFO L124 PetriNetUnfolderBase]: 2165/3219 cut-off events. [2024-06-27 21:25:09,603 INFO L125 PetriNetUnfolderBase]: For 81225/81227 co-relation queries the response was YES. [2024-06-27 21:25:09,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22970 conditions, 3219 events. 2165/3219 cut-off events. For 81225/81227 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 14918 event pairs, 531 based on Foata normal form. 10/3228 useless extension candidates. Maximal degree in co-relation 22895. Up to 2779 conditions per place. [2024-06-27 21:25:09,723 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 189 selfloop transitions, 75 changer transitions 0/267 dead transitions. [2024-06-27 21:25:09,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 267 transitions, 3718 flow [2024-06-27 21:25:09,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:25:09,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:25:09,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-27 21:25:09,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-06-27 21:25:09,725 INFO L175 Difference]: Start difference. First operand has 161 places, 228 transitions, 2881 flow. Second operand 9 states and 154 transitions. [2024-06-27 21:25:09,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 267 transitions, 3718 flow [2024-06-27 21:25:09,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 267 transitions, 3622 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-27 21:25:09,814 INFO L231 Difference]: Finished difference. Result has 164 places, 233 transitions, 3050 flow [2024-06-27 21:25:09,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2789, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3050, PETRI_PLACES=164, PETRI_TRANSITIONS=233} [2024-06-27 21:25:09,814 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 123 predicate places. [2024-06-27 21:25:09,814 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 233 transitions, 3050 flow [2024-06-27 21:25:09,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:09,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:09,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:25:09,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 21:25:09,815 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:25:09,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:09,815 INFO L85 PathProgramCache]: Analyzing trace with hash -775601908, now seen corresponding path program 3 times [2024-06-27 21:25:09,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:09,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978058813] [2024-06-27 21:25:09,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:09,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:09,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:10,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:25:10,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:10,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978058813] [2024-06-27 21:25:10,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978058813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:10,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:10,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:25:10,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49459155] [2024-06-27 21:25:10,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:10,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:25:10,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:10,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:25:10,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:25:10,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:25:10,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 233 transitions, 3050 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:10,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:10,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:25:10,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:11,250 INFO L124 PetriNetUnfolderBase]: 2183/3264 cut-off events. [2024-06-27 21:25:11,250 INFO L125 PetriNetUnfolderBase]: For 95334/95480 co-relation queries the response was YES. [2024-06-27 21:25:11,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24656 conditions, 3264 events. 2183/3264 cut-off events. For 95334/95480 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 15495 event pairs, 520 based on Foata normal form. 26/3198 useless extension candidates. Maximal degree in co-relation 24579. Up to 2887 conditions per place. [2024-06-27 21:25:11,279 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 165 selfloop transitions, 99 changer transitions 0/300 dead transitions. [2024-06-27 21:25:11,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 300 transitions, 4507 flow [2024-06-27 21:25:11,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:25:11,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:25:11,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 21:25:11,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-06-27 21:25:11,280 INFO L175 Difference]: Start difference. First operand has 164 places, 233 transitions, 3050 flow. Second operand 8 states and 134 transitions. [2024-06-27 21:25:11,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 300 transitions, 4507 flow [2024-06-27 21:25:11,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 300 transitions, 4381 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 21:25:11,406 INFO L231 Difference]: Finished difference. Result has 168 places, 276 transitions, 4026 flow [2024-06-27 21:25:11,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2939, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4026, PETRI_PLACES=168, PETRI_TRANSITIONS=276} [2024-06-27 21:25:11,406 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 127 predicate places. [2024-06-27 21:25:11,407 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 276 transitions, 4026 flow [2024-06-27 21:25:11,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:11,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:11,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:25:11,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 21:25:11,407 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:25:11,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:11,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1504326731, now seen corresponding path program 5 times [2024-06-27 21:25:11,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:11,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827424787] [2024-06-27 21:25:11,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:11,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:11,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:11,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:25:11,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:11,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827424787] [2024-06-27 21:25:11,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827424787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:11,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:11,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:25:11,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938921424] [2024-06-27 21:25:11,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:11,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:25:11,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:11,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:25:11,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:25:11,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:25:11,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 276 transitions, 4026 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:11,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:11,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:25:11,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:12,653 INFO L124 PetriNetUnfolderBase]: 2311/3430 cut-off events. [2024-06-27 21:25:12,654 INFO L125 PetriNetUnfolderBase]: For 95926/95932 co-relation queries the response was YES. [2024-06-27 21:25:12,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25536 conditions, 3430 events. 2311/3430 cut-off events. For 95926/95932 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 16154 event pairs, 573 based on Foata normal form. 10/3439 useless extension candidates. Maximal degree in co-relation 25457. Up to 3113 conditions per place. [2024-06-27 21:25:12,684 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 235 selfloop transitions, 72 changer transitions 0/310 dead transitions. [2024-06-27 21:25:12,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 310 transitions, 4836 flow [2024-06-27 21:25:12,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:25:12,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:25:12,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 21:25:12,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-27 21:25:12,685 INFO L175 Difference]: Start difference. First operand has 168 places, 276 transitions, 4026 flow. Second operand 8 states and 132 transitions. [2024-06-27 21:25:12,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 310 transitions, 4836 flow [2024-06-27 21:25:12,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 310 transitions, 4652 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 21:25:12,805 INFO L231 Difference]: Finished difference. Result has 174 places, 282 transitions, 4126 flow [2024-06-27 21:25:12,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3846, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4126, PETRI_PLACES=174, PETRI_TRANSITIONS=282} [2024-06-27 21:25:12,806 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 133 predicate places. [2024-06-27 21:25:12,806 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 282 transitions, 4126 flow [2024-06-27 21:25:12,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:12,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:12,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:25:12,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 21:25:12,807 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:25:12,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:12,807 INFO L85 PathProgramCache]: Analyzing trace with hash 988308522, now seen corresponding path program 2 times [2024-06-27 21:25:12,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:12,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200457243] [2024-06-27 21:25:12,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:12,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:12,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:13,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:25:13,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:13,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200457243] [2024-06-27 21:25:13,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200457243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:13,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:13,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:25:13,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790422793] [2024-06-27 21:25:13,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:13,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:25:13,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:13,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:25:13,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:25:13,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:25:13,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 282 transitions, 4126 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:13,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:13,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:25:13,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:14,250 INFO L124 PetriNetUnfolderBase]: 2322/3452 cut-off events. [2024-06-27 21:25:14,250 INFO L125 PetriNetUnfolderBase]: For 103929/103933 co-relation queries the response was YES. [2024-06-27 21:25:14,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26338 conditions, 3452 events. 2322/3452 cut-off events. For 103929/103933 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 16390 event pairs, 802 based on Foata normal form. 6/3457 useless extension candidates. Maximal degree in co-relation 26256. Up to 3342 conditions per place. [2024-06-27 21:25:14,392 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 273 selfloop transitions, 33 changer transitions 0/309 dead transitions. [2024-06-27 21:25:14,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 309 transitions, 4862 flow [2024-06-27 21:25:14,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:25:14,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:25:14,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-27 21:25:14,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39375 [2024-06-27 21:25:14,394 INFO L175 Difference]: Start difference. First operand has 174 places, 282 transitions, 4126 flow. Second operand 8 states and 126 transitions. [2024-06-27 21:25:14,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 309 transitions, 4862 flow [2024-06-27 21:25:14,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 309 transitions, 4773 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-27 21:25:14,555 INFO L231 Difference]: Finished difference. Result has 178 places, 285 transitions, 4153 flow [2024-06-27 21:25:14,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4037, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4153, PETRI_PLACES=178, PETRI_TRANSITIONS=285} [2024-06-27 21:25:14,556 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 137 predicate places. [2024-06-27 21:25:14,556 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 285 transitions, 4153 flow [2024-06-27 21:25:14,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:14,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:14,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:25:14,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 21:25:14,557 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:25:14,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:14,557 INFO L85 PathProgramCache]: Analyzing trace with hash -771878963, now seen corresponding path program 6 times [2024-06-27 21:25:14,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:14,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000423412] [2024-06-27 21:25:14,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:14,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:14,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:15,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:25:15,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:15,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000423412] [2024-06-27 21:25:15,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000423412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:15,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:15,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:25:15,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463903687] [2024-06-27 21:25:15,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:15,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:25:15,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:15,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:25:15,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:25:15,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:25:15,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 285 transitions, 4153 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:15,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:15,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:25:15,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:15,897 INFO L124 PetriNetUnfolderBase]: 2456/3639 cut-off events. [2024-06-27 21:25:15,898 INFO L125 PetriNetUnfolderBase]: For 116616/116618 co-relation queries the response was YES. [2024-06-27 21:25:15,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28532 conditions, 3639 events. 2456/3639 cut-off events. For 116616/116618 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 17155 event pairs, 554 based on Foata normal form. 6/3644 useless extension candidates. Maximal degree in co-relation 28448. Up to 2889 conditions per place. [2024-06-27 21:25:15,934 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 228 selfloop transitions, 100 changer transitions 0/331 dead transitions. [2024-06-27 21:25:15,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 331 transitions, 5369 flow [2024-06-27 21:25:15,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:25:15,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:25:15,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 21:25:15,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 21:25:15,936 INFO L175 Difference]: Start difference. First operand has 178 places, 285 transitions, 4153 flow. Second operand 8 states and 140 transitions. [2024-06-27 21:25:15,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 331 transitions, 5369 flow [2024-06-27 21:25:16,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 331 transitions, 5291 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 21:25:16,122 INFO L231 Difference]: Finished difference. Result has 182 places, 298 transitions, 4573 flow [2024-06-27 21:25:16,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4075, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4573, PETRI_PLACES=182, PETRI_TRANSITIONS=298} [2024-06-27 21:25:16,123 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 141 predicate places. [2024-06-27 21:25:16,123 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 298 transitions, 4573 flow [2024-06-27 21:25:16,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:16,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:16,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:25:16,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 21:25:16,123 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:25:16,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:16,124 INFO L85 PathProgramCache]: Analyzing trace with hash 988308305, now seen corresponding path program 7 times [2024-06-27 21:25:16,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:16,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162877261] [2024-06-27 21:25:16,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:16,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:16,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:16,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:25:16,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:16,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162877261] [2024-06-27 21:25:16,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162877261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:16,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:16,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:25:16,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265587747] [2024-06-27 21:25:16,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:16,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:25:16,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:16,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:25:16,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:25:16,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:25:16,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 298 transitions, 4573 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:16,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:16,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:25:16,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:17,490 INFO L124 PetriNetUnfolderBase]: 2436/3611 cut-off events. [2024-06-27 21:25:17,491 INFO L125 PetriNetUnfolderBase]: For 127643/127645 co-relation queries the response was YES. [2024-06-27 21:25:17,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29716 conditions, 3611 events. 2436/3611 cut-off events. For 127643/127645 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 17072 event pairs, 532 based on Foata normal form. 10/3620 useless extension candidates. Maximal degree in co-relation 29629. Up to 2877 conditions per place. [2024-06-27 21:25:17,526 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 216 selfloop transitions, 112 changer transitions 0/331 dead transitions. [2024-06-27 21:25:17,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 331 transitions, 5528 flow [2024-06-27 21:25:17,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:25:17,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:25:17,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 21:25:17,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428125 [2024-06-27 21:25:17,528 INFO L175 Difference]: Start difference. First operand has 182 places, 298 transitions, 4573 flow. Second operand 8 states and 137 transitions. [2024-06-27 21:25:17,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 331 transitions, 5528 flow [2024-06-27 21:25:17,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 331 transitions, 5385 flow, removed 52 selfloop flow, removed 3 redundant places. [2024-06-27 21:25:17,805 INFO L231 Difference]: Finished difference. Result has 188 places, 301 transitions, 4774 flow [2024-06-27 21:25:17,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4440, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4774, PETRI_PLACES=188, PETRI_TRANSITIONS=301} [2024-06-27 21:25:17,806 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 147 predicate places. [2024-06-27 21:25:17,806 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 301 transitions, 4774 flow [2024-06-27 21:25:17,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:17,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:17,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:25:17,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 21:25:17,806 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:25:17,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:17,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1612188, now seen corresponding path program 3 times [2024-06-27 21:25:17,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:17,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148892560] [2024-06-27 21:25:17,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:17,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:17,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:18,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:25:18,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:18,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148892560] [2024-06-27 21:25:18,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148892560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:18,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:18,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:25:18,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471443563] [2024-06-27 21:25:18,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:18,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:25:18,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:18,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:25:18,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:25:18,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:25:18,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 301 transitions, 4774 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:18,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:18,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:25:18,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:19,169 INFO L124 PetriNetUnfolderBase]: 2479/3676 cut-off events. [2024-06-27 21:25:19,169 INFO L125 PetriNetUnfolderBase]: For 131723/131725 co-relation queries the response was YES. [2024-06-27 21:25:19,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30535 conditions, 3676 events. 2479/3676 cut-off events. For 131723/131725 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 17427 event pairs, 506 based on Foata normal form. 4/3676 useless extension candidates. Maximal degree in co-relation 30445. Up to 2806 conditions per place. [2024-06-27 21:25:19,206 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 204 selfloop transitions, 144 changer transitions 0/351 dead transitions. [2024-06-27 21:25:19,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 351 transitions, 6134 flow [2024-06-27 21:25:19,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:25:19,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:25:19,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 21:25:19,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434375 [2024-06-27 21:25:19,207 INFO L175 Difference]: Start difference. First operand has 188 places, 301 transitions, 4774 flow. Second operand 8 states and 139 transitions. [2024-06-27 21:25:19,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 351 transitions, 6134 flow [2024-06-27 21:25:19,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 351 transitions, 5965 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 21:25:19,418 INFO L231 Difference]: Finished difference. Result has 193 places, 322 transitions, 5374 flow [2024-06-27 21:25:19,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4637, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5374, PETRI_PLACES=193, PETRI_TRANSITIONS=322} [2024-06-27 21:25:19,419 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 152 predicate places. [2024-06-27 21:25:19,419 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 322 transitions, 5374 flow [2024-06-27 21:25:19,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:19,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:19,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:25:19,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 21:25:19,420 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:25:19,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:19,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1879098, now seen corresponding path program 4 times [2024-06-27 21:25:19,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:19,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32991472] [2024-06-27 21:25:19,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:19,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:19,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:20,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:25:20,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:20,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32991472] [2024-06-27 21:25:20,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32991472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:20,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:20,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:25:20,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787990814] [2024-06-27 21:25:20,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:20,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:25:20,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:20,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:25:20,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:25:20,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:25:20,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 322 transitions, 5374 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:20,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:20,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:25:20,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:20,952 INFO L124 PetriNetUnfolderBase]: 2550/3781 cut-off events. [2024-06-27 21:25:20,952 INFO L125 PetriNetUnfolderBase]: For 134948/134950 co-relation queries the response was YES. [2024-06-27 21:25:20,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32389 conditions, 3781 events. 2550/3781 cut-off events. For 134948/134950 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 17982 event pairs, 514 based on Foata normal form. 8/3784 useless extension candidates. Maximal degree in co-relation 32297. Up to 3066 conditions per place. [2024-06-27 21:25:20,990 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 226 selfloop transitions, 130 changer transitions 0/359 dead transitions. [2024-06-27 21:25:20,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 359 transitions, 6565 flow [2024-06-27 21:25:20,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:25:20,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:25:20,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 21:25:20,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 21:25:20,993 INFO L175 Difference]: Start difference. First operand has 193 places, 322 transitions, 5374 flow. Second operand 8 states and 140 transitions. [2024-06-27 21:25:20,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 359 transitions, 6565 flow [2024-06-27 21:25:21,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 359 transitions, 6468 flow, removed 31 selfloop flow, removed 2 redundant places. [2024-06-27 21:25:21,227 INFO L231 Difference]: Finished difference. Result has 199 places, 329 transitions, 5684 flow [2024-06-27 21:25:21,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5285, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5684, PETRI_PLACES=199, PETRI_TRANSITIONS=329} [2024-06-27 21:25:21,227 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 158 predicate places. [2024-06-27 21:25:21,227 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 329 transitions, 5684 flow [2024-06-27 21:25:21,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:21,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:21,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:25:21,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 21:25:21,228 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:25:21,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:21,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1583454441, now seen corresponding path program 8 times [2024-06-27 21:25:21,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:21,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458164986] [2024-06-27 21:25:21,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:21,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:21,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:21,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:25:21,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:21,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458164986] [2024-06-27 21:25:21,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458164986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:21,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:21,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:25:21,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506949689] [2024-06-27 21:25:21,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:21,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:25:21,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:21,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:25:21,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:25:21,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:25:21,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 329 transitions, 5684 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:21,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:21,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:25:21,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:22,611 INFO L124 PetriNetUnfolderBase]: 2556/3789 cut-off events. [2024-06-27 21:25:22,611 INFO L125 PetriNetUnfolderBase]: For 142760/142762 co-relation queries the response was YES. [2024-06-27 21:25:22,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33102 conditions, 3789 events. 2556/3789 cut-off events. For 142760/142762 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 18054 event pairs, 514 based on Foata normal form. 10/3794 useless extension candidates. Maximal degree in co-relation 33008. Up to 2793 conditions per place. [2024-06-27 21:25:22,662 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 212 selfloop transitions, 148 changer transitions 0/363 dead transitions. [2024-06-27 21:25:22,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 363 transitions, 6734 flow [2024-06-27 21:25:22,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:25:22,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:25:22,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 21:25:22,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 21:25:22,664 INFO L175 Difference]: Start difference. First operand has 199 places, 329 transitions, 5684 flow. Second operand 8 states and 140 transitions. [2024-06-27 21:25:22,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 363 transitions, 6734 flow [2024-06-27 21:25:22,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 363 transitions, 6396 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-27 21:25:22,922 INFO L231 Difference]: Finished difference. Result has 202 places, 335 transitions, 5757 flow [2024-06-27 21:25:22,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5346, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5757, PETRI_PLACES=202, PETRI_TRANSITIONS=335} [2024-06-27 21:25:22,923 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 161 predicate places. [2024-06-27 21:25:22,923 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 335 transitions, 5757 flow [2024-06-27 21:25:22,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:22,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:22,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:25:22,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 21:25:22,924 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:25:22,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:22,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1590811671, now seen corresponding path program 9 times [2024-06-27 21:25:22,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:22,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576899206] [2024-06-27 21:25:22,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:22,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:22,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:23,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:25:23,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:23,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576899206] [2024-06-27 21:25:23,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576899206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:23,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:23,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:25:23,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221580107] [2024-06-27 21:25:23,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:23,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:25:23,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:23,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:25:23,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:25:23,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:25:23,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 335 transitions, 5757 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:23,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:23,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:25:23,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:24,309 INFO L124 PetriNetUnfolderBase]: 2578/3821 cut-off events. [2024-06-27 21:25:24,309 INFO L125 PetriNetUnfolderBase]: For 149336/149338 co-relation queries the response was YES. [2024-06-27 21:25:24,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33730 conditions, 3821 events. 2578/3821 cut-off events. For 149336/149338 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 18202 event pairs, 540 based on Foata normal form. 6/3822 useless extension candidates. Maximal degree in co-relation 33635. Up to 2802 conditions per place. [2024-06-27 21:25:24,351 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 230 selfloop transitions, 138 changer transitions 0/371 dead transitions. [2024-06-27 21:25:24,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 371 transitions, 7075 flow [2024-06-27 21:25:24,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:25:24,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:25:24,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 21:25:24,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-06-27 21:25:24,353 INFO L175 Difference]: Start difference. First operand has 202 places, 335 transitions, 5757 flow. Second operand 8 states and 145 transitions. [2024-06-27 21:25:24,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 371 transitions, 7075 flow [2024-06-27 21:25:24,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 371 transitions, 6917 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-27 21:25:24,629 INFO L231 Difference]: Finished difference. Result has 206 places, 339 transitions, 5973 flow [2024-06-27 21:25:24,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5599, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5973, PETRI_PLACES=206, PETRI_TRANSITIONS=339} [2024-06-27 21:25:24,629 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 165 predicate places. [2024-06-27 21:25:24,629 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 339 transitions, 5973 flow [2024-06-27 21:25:24,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:24,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:24,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:25:24,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 21:25:24,630 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:25:24,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:24,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1590806091, now seen corresponding path program 10 times [2024-06-27 21:25:24,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:24,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656305324] [2024-06-27 21:25:24,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:24,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:24,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:25,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:25:25,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:25,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656305324] [2024-06-27 21:25:25,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656305324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:25,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:25,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:25:25,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385974311] [2024-06-27 21:25:25,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:25,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:25:25,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:25,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:25:25,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:25:25,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:25:25,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 339 transitions, 5973 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:25,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:25,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:25:25,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:26,135 INFO L124 PetriNetUnfolderBase]: 2564/3803 cut-off events. [2024-06-27 21:25:26,135 INFO L125 PetriNetUnfolderBase]: For 153380/153382 co-relation queries the response was YES. [2024-06-27 21:25:26,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33838 conditions, 3803 events. 2564/3803 cut-off events. For 153380/153382 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 18123 event pairs, 541 based on Foata normal form. 10/3808 useless extension candidates. Maximal degree in co-relation 33741. Up to 2798 conditions per place. [2024-06-27 21:25:26,173 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 233 selfloop transitions, 133 changer transitions 0/369 dead transitions. [2024-06-27 21:25:26,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 369 transitions, 7079 flow [2024-06-27 21:25:26,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:25:26,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:25:26,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 21:25:26,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 21:25:26,175 INFO L175 Difference]: Start difference. First operand has 206 places, 339 transitions, 5973 flow. Second operand 8 states and 144 transitions. [2024-06-27 21:25:26,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 369 transitions, 7079 flow [2024-06-27 21:25:26,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 369 transitions, 6722 flow, removed 67 selfloop flow, removed 4 redundant places. [2024-06-27 21:25:26,486 INFO L231 Difference]: Finished difference. Result has 210 places, 339 transitions, 5894 flow [2024-06-27 21:25:26,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5616, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5894, PETRI_PLACES=210, PETRI_TRANSITIONS=339} [2024-06-27 21:25:26,487 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 169 predicate places. [2024-06-27 21:25:26,487 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 339 transitions, 5894 flow [2024-06-27 21:25:26,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:26,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:26,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:25:26,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 21:25:26,488 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:25:26,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:26,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1590805874, now seen corresponding path program 5 times [2024-06-27 21:25:26,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:26,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033504687] [2024-06-27 21:25:26,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:26,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:26,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:27,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:25:27,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:27,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033504687] [2024-06-27 21:25:27,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033504687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:27,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:27,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:25:27,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031674054] [2024-06-27 21:25:27,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:27,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:25:27,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:27,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:25:27,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:25:27,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:25:27,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 339 transitions, 5894 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:27,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:27,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:25:27,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:28,046 INFO L124 PetriNetUnfolderBase]: 2543/3772 cut-off events. [2024-06-27 21:25:28,046 INFO L125 PetriNetUnfolderBase]: For 157003/157005 co-relation queries the response was YES. [2024-06-27 21:25:28,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32961 conditions, 3772 events. 2543/3772 cut-off events. For 157003/157005 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 17978 event pairs, 538 based on Foata normal form. 8/3775 useless extension candidates. Maximal degree in co-relation 32864. Up to 3052 conditions per place. [2024-06-27 21:25:28,083 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 246 selfloop transitions, 118 changer transitions 0/367 dead transitions. [2024-06-27 21:25:28,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 367 transitions, 6868 flow [2024-06-27 21:25:28,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:25:28,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:25:28,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 21:25:28,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434375 [2024-06-27 21:25:28,086 INFO L175 Difference]: Start difference. First operand has 210 places, 339 transitions, 5894 flow. Second operand 8 states and 139 transitions. [2024-06-27 21:25:28,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 367 transitions, 6868 flow [2024-06-27 21:25:28,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 367 transitions, 6519 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-27 21:25:28,419 INFO L231 Difference]: Finished difference. Result has 213 places, 339 transitions, 5792 flow [2024-06-27 21:25:28,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5545, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5792, PETRI_PLACES=213, PETRI_TRANSITIONS=339} [2024-06-27 21:25:28,420 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 172 predicate places. [2024-06-27 21:25:28,420 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 339 transitions, 5792 flow [2024-06-27 21:25:28,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:28,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:28,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:25:28,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 21:25:28,421 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:25:28,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:28,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1217278712, now seen corresponding path program 1 times [2024-06-27 21:25:28,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:28,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365244633] [2024-06-27 21:25:28,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:28,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:28,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:29,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:25:29,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:29,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365244633] [2024-06-27 21:25:29,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365244633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:29,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:29,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:25:29,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265689564] [2024-06-27 21:25:29,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:29,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:25:29,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:29,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:25:29,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:25:29,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:25:29,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 339 transitions, 5792 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:29,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:29,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:25:29,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:29,955 INFO L124 PetriNetUnfolderBase]: 2499/3735 cut-off events. [2024-06-27 21:25:29,955 INFO L125 PetriNetUnfolderBase]: For 176567/176706 co-relation queries the response was YES. [2024-06-27 21:25:29,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32993 conditions, 3735 events. 2499/3735 cut-off events. For 176567/176706 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 18282 event pairs, 695 based on Foata normal form. 16/3644 useless extension candidates. Maximal degree in co-relation 32895. Up to 3324 conditions per place. [2024-06-27 21:25:29,996 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 236 selfloop transitions, 83 changer transitions 0/376 dead transitions. [2024-06-27 21:25:29,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 376 transitions, 6594 flow [2024-06-27 21:25:29,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:25:29,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:25:29,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 21:25:29,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-06-27 21:25:29,998 INFO L175 Difference]: Start difference. First operand has 213 places, 339 transitions, 5792 flow. Second operand 9 states and 155 transitions. [2024-06-27 21:25:29,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 376 transitions, 6594 flow [2024-06-27 21:25:30,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 376 transitions, 6410 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 21:25:30,353 INFO L231 Difference]: Finished difference. Result has 217 places, 343 transitions, 5843 flow [2024-06-27 21:25:30,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5608, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5843, PETRI_PLACES=217, PETRI_TRANSITIONS=343} [2024-06-27 21:25:30,354 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 176 predicate places. [2024-06-27 21:25:30,354 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 343 transitions, 5843 flow [2024-06-27 21:25:30,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:30,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:30,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:25:30,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 21:25:30,355 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:25:30,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:30,355 INFO L85 PathProgramCache]: Analyzing trace with hash 800202284, now seen corresponding path program 2 times [2024-06-27 21:25:30,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:30,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902772904] [2024-06-27 21:25:30,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:30,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:30,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:31,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:25:31,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:31,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902772904] [2024-06-27 21:25:31,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902772904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:31,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:31,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:25:31,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244535421] [2024-06-27 21:25:31,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:31,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:25:31,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:31,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:25:31,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:25:31,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:25:31,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 343 transitions, 5843 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:31,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:31,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:25:31,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:32,001 INFO L124 PetriNetUnfolderBase]: 2547/3823 cut-off events. [2024-06-27 21:25:32,001 INFO L125 PetriNetUnfolderBase]: For 189414/189499 co-relation queries the response was YES. [2024-06-27 21:25:32,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33546 conditions, 3823 events. 2547/3823 cut-off events. For 189414/189499 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 18953 event pairs, 533 based on Foata normal form. 34/3745 useless extension candidates. Maximal degree in co-relation 33446. Up to 3319 conditions per place. [2024-06-27 21:25:32,043 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 241 selfloop transitions, 87 changer transitions 0/385 dead transitions. [2024-06-27 21:25:32,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 385 transitions, 6736 flow [2024-06-27 21:25:32,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:25:32,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:25:32,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 21:25:32,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-27 21:25:32,045 INFO L175 Difference]: Start difference. First operand has 217 places, 343 transitions, 5843 flow. Second operand 9 states and 153 transitions. [2024-06-27 21:25:32,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 385 transitions, 6736 flow [2024-06-27 21:25:32,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 385 transitions, 6425 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-27 21:25:32,390 INFO L231 Difference]: Finished difference. Result has 220 places, 352 transitions, 5866 flow [2024-06-27 21:25:32,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5569, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5866, PETRI_PLACES=220, PETRI_TRANSITIONS=352} [2024-06-27 21:25:32,391 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 179 predicate places. [2024-06-27 21:25:32,391 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 352 transitions, 5866 flow [2024-06-27 21:25:32,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:32,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:32,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:25:32,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 21:25:32,392 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:25:32,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:32,392 INFO L85 PathProgramCache]: Analyzing trace with hash -495958404, now seen corresponding path program 3 times [2024-06-27 21:25:32,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:32,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497712583] [2024-06-27 21:25:32,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:32,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:32,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:33,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:25:33,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:33,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497712583] [2024-06-27 21:25:33,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497712583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:33,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:33,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:25:33,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544050098] [2024-06-27 21:25:33,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:33,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:25:33,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:33,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:25:33,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:25:33,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:25:33,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 352 transitions, 5866 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:33,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:33,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:25:33,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:34,031 INFO L124 PetriNetUnfolderBase]: 2555/3849 cut-off events. [2024-06-27 21:25:34,031 INFO L125 PetriNetUnfolderBase]: For 194739/194926 co-relation queries the response was YES. [2024-06-27 21:25:34,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34129 conditions, 3849 events. 2555/3849 cut-off events. For 194739/194926 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 19209 event pairs, 654 based on Foata normal form. 18/3761 useless extension candidates. Maximal degree in co-relation 34027. Up to 3362 conditions per place. [2024-06-27 21:25:34,074 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 218 selfloop transitions, 111 changer transitions 0/386 dead transitions. [2024-06-27 21:25:34,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 386 transitions, 6698 flow [2024-06-27 21:25:34,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:25:34,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:25:34,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 21:25:34,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-06-27 21:25:34,075 INFO L175 Difference]: Start difference. First operand has 220 places, 352 transitions, 5866 flow. Second operand 9 states and 155 transitions. [2024-06-27 21:25:34,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 386 transitions, 6698 flow [2024-06-27 21:25:34,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 386 transitions, 6485 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-27 21:25:34,424 INFO L231 Difference]: Finished difference. Result has 222 places, 354 transitions, 5943 flow [2024-06-27 21:25:34,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5653, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5943, PETRI_PLACES=222, PETRI_TRANSITIONS=354} [2024-06-27 21:25:34,425 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 181 predicate places. [2024-06-27 21:25:34,425 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 354 transitions, 5943 flow [2024-06-27 21:25:34,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:34,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:34,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:25:34,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 21:25:34,426 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:25:34,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:34,426 INFO L85 PathProgramCache]: Analyzing trace with hash -495922010, now seen corresponding path program 1 times [2024-06-27 21:25:34,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:34,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392168574] [2024-06-27 21:25:34,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:34,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:34,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:35,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:25:35,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:35,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392168574] [2024-06-27 21:25:35,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392168574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:35,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:35,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:25:35,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830492522] [2024-06-27 21:25:35,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:35,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:25:35,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:35,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:25:35,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:25:35,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:25:35,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 354 transitions, 5943 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:35,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:35,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:25:35,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:35,991 INFO L124 PetriNetUnfolderBase]: 2719/4057 cut-off events. [2024-06-27 21:25:35,991 INFO L125 PetriNetUnfolderBase]: For 186901/186905 co-relation queries the response was YES. [2024-06-27 21:25:36,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35320 conditions, 4057 events. 2719/4057 cut-off events. For 186901/186905 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 20112 event pairs, 736 based on Foata normal form. 6/4062 useless extension candidates. Maximal degree in co-relation 35218. Up to 3790 conditions per place. [2024-06-27 21:25:36,035 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 317 selfloop transitions, 71 changer transitions 0/391 dead transitions. [2024-06-27 21:25:36,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 391 transitions, 6964 flow [2024-06-27 21:25:36,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:25:36,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:25:36,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-27 21:25:36,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4111111111111111 [2024-06-27 21:25:36,037 INFO L175 Difference]: Start difference. First operand has 222 places, 354 transitions, 5943 flow. Second operand 9 states and 148 transitions. [2024-06-27 21:25:36,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 391 transitions, 6964 flow [2024-06-27 21:25:36,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 391 transitions, 6714 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-27 21:25:36,391 INFO L231 Difference]: Finished difference. Result has 225 places, 359 transitions, 5996 flow [2024-06-27 21:25:36,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5693, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5996, PETRI_PLACES=225, PETRI_TRANSITIONS=359} [2024-06-27 21:25:36,392 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 184 predicate places. [2024-06-27 21:25:36,392 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 359 transitions, 5996 flow [2024-06-27 21:25:36,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:36,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:36,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:25:36,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 21:25:36,393 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:25:36,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:36,393 INFO L85 PathProgramCache]: Analyzing trace with hash -278258164, now seen corresponding path program 1 times [2024-06-27 21:25:36,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:36,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952543581] [2024-06-27 21:25:36,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:36,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:36,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:37,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:25:37,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:37,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952543581] [2024-06-27 21:25:37,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952543581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:37,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:37,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:25:37,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498192049] [2024-06-27 21:25:37,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:37,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:25:37,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:37,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:25:37,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:25:37,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:25:37,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 359 transitions, 5996 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:37,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:37,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:25:37,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:37,981 INFO L124 PetriNetUnfolderBase]: 2712/4042 cut-off events. [2024-06-27 21:25:37,981 INFO L125 PetriNetUnfolderBase]: For 191609/191613 co-relation queries the response was YES. [2024-06-27 21:25:38,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35270 conditions, 4042 events. 2712/4042 cut-off events. For 191609/191613 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 19847 event pairs, 557 based on Foata normal form. 8/4049 useless extension candidates. Maximal degree in co-relation 35166. Up to 3536 conditions per place. [2024-06-27 21:25:38,023 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 288 selfloop transitions, 102 changer transitions 0/393 dead transitions. [2024-06-27 21:25:38,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 393 transitions, 7090 flow [2024-06-27 21:25:38,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:25:38,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:25:38,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 21:25:38,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-27 21:25:38,025 INFO L175 Difference]: Start difference. First operand has 225 places, 359 transitions, 5996 flow. Second operand 9 states and 153 transitions. [2024-06-27 21:25:38,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 393 transitions, 7090 flow [2024-06-27 21:25:38,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 393 transitions, 6988 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-27 21:25:38,504 INFO L231 Difference]: Finished difference. Result has 231 places, 360 transitions, 6179 flow [2024-06-27 21:25:38,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5894, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6179, PETRI_PLACES=231, PETRI_TRANSITIONS=360} [2024-06-27 21:25:38,504 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 190 predicate places. [2024-06-27 21:25:38,505 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 360 transitions, 6179 flow [2024-06-27 21:25:38,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:38,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:38,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:25:38,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 21:25:38,505 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:25:38,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:38,505 INFO L85 PathProgramCache]: Analyzing trace with hash 19175872, now seen corresponding path program 4 times [2024-06-27 21:25:38,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:38,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451123158] [2024-06-27 21:25:38,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:38,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:38,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:39,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:25:39,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:39,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451123158] [2024-06-27 21:25:39,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451123158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:39,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:39,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:25:39,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791869091] [2024-06-27 21:25:39,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:39,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:25:39,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:39,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:25:39,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:25:39,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:25:39,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 360 transitions, 6179 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:39,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:39,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:25:39,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:40,237 INFO L124 PetriNetUnfolderBase]: 2628/3965 cut-off events. [2024-06-27 21:25:40,238 INFO L125 PetriNetUnfolderBase]: For 218564/218709 co-relation queries the response was YES. [2024-06-27 21:25:40,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35558 conditions, 3965 events. 2628/3965 cut-off events. For 218564/218709 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 20053 event pairs, 498 based on Foata normal form. 52/3905 useless extension candidates. Maximal degree in co-relation 35452. Up to 3494 conditions per place. [2024-06-27 21:25:40,282 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 255 selfloop transitions, 88 changer transitions 0/403 dead transitions. [2024-06-27 21:25:40,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 403 transitions, 7094 flow [2024-06-27 21:25:40,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:25:40,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:25:40,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 21:25:40,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-27 21:25:40,284 INFO L175 Difference]: Start difference. First operand has 231 places, 360 transitions, 6179 flow. Second operand 9 states and 156 transitions. [2024-06-27 21:25:40,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 403 transitions, 7094 flow [2024-06-27 21:25:40,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 403 transitions, 6935 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 21:25:40,614 INFO L231 Difference]: Finished difference. Result has 236 places, 372 transitions, 6363 flow [2024-06-27 21:25:40,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6020, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6363, PETRI_PLACES=236, PETRI_TRANSITIONS=372} [2024-06-27 21:25:40,614 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 195 predicate places. [2024-06-27 21:25:40,614 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 372 transitions, 6363 flow [2024-06-27 21:25:40,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:40,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:40,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:25:40,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 21:25:40,616 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:25:40,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:40,616 INFO L85 PathProgramCache]: Analyzing trace with hash -726729144, now seen corresponding path program 5 times [2024-06-27 21:25:40,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:40,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436170046] [2024-06-27 21:25:40,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:40,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:40,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:41,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:25:41,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:41,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436170046] [2024-06-27 21:25:41,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436170046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:41,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:41,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:25:41,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395999832] [2024-06-27 21:25:41,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:41,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:25:41,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:41,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:25:41,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:25:41,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:25:41,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 372 transitions, 6363 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:41,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:41,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:25:41,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:42,520 INFO L124 PetriNetUnfolderBase]: 2656/4017 cut-off events. [2024-06-27 21:25:42,520 INFO L125 PetriNetUnfolderBase]: For 232371/232586 co-relation queries the response was YES. [2024-06-27 21:25:42,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36339 conditions, 4017 events. 2656/4017 cut-off events. For 232371/232586 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 20506 event pairs, 508 based on Foata normal form. 50/3949 useless extension candidates. Maximal degree in co-relation 36231. Up to 3520 conditions per place. [2024-06-27 21:25:42,567 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 236 selfloop transitions, 110 changer transitions 0/406 dead transitions. [2024-06-27 21:25:42,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 406 transitions, 7233 flow [2024-06-27 21:25:42,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:25:42,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:25:42,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 21:25:42,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-27 21:25:42,569 INFO L175 Difference]: Start difference. First operand has 236 places, 372 transitions, 6363 flow. Second operand 9 states and 156 transitions. [2024-06-27 21:25:42,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 406 transitions, 7233 flow [2024-06-27 21:25:42,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 406 transitions, 7040 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-27 21:25:43,003 INFO L231 Difference]: Finished difference. Result has 239 places, 376 transitions, 6480 flow [2024-06-27 21:25:43,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6170, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6480, PETRI_PLACES=239, PETRI_TRANSITIONS=376} [2024-06-27 21:25:43,004 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 198 predicate places. [2024-06-27 21:25:43,004 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 376 transitions, 6480 flow [2024-06-27 21:25:43,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:43,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:43,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:25:43,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 21:25:43,005 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:25:43,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:43,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1743829218, now seen corresponding path program 2 times [2024-06-27 21:25:43,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:43,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246651829] [2024-06-27 21:25:43,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:43,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:43,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:43,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:25:43,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:43,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246651829] [2024-06-27 21:25:43,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246651829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:43,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:43,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:25:43,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069711211] [2024-06-27 21:25:43,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:43,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:25:43,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:43,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:25:43,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:25:43,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:25:43,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 376 transitions, 6480 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:43,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:43,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:25:43,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:44,889 INFO L124 PetriNetUnfolderBase]: 2882/4309 cut-off events. [2024-06-27 21:25:44,889 INFO L125 PetriNetUnfolderBase]: For 220018/220024 co-relation queries the response was YES. [2024-06-27 21:25:44,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37948 conditions, 4309 events. 2882/4309 cut-off events. For 220018/220024 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 21820 event pairs, 617 based on Foata normal form. 8/4316 useless extension candidates. Maximal degree in co-relation 37839. Up to 4042 conditions per place. [2024-06-27 21:25:44,938 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 334 selfloop transitions, 74 changer transitions 0/411 dead transitions. [2024-06-27 21:25:44,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 411 transitions, 7512 flow [2024-06-27 21:25:44,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:25:44,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:25:44,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-27 21:25:44,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41388888888888886 [2024-06-27 21:25:44,939 INFO L175 Difference]: Start difference. First operand has 239 places, 376 transitions, 6480 flow. Second operand 9 states and 149 transitions. [2024-06-27 21:25:44,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 411 transitions, 7512 flow [2024-06-27 21:25:45,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 411 transitions, 7272 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-27 21:25:45,429 INFO L231 Difference]: Finished difference. Result has 243 places, 381 transitions, 6536 flow [2024-06-27 21:25:45,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6240, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6536, PETRI_PLACES=243, PETRI_TRANSITIONS=381} [2024-06-27 21:25:45,430 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 202 predicate places. [2024-06-27 21:25:45,430 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 381 transitions, 6536 flow [2024-06-27 21:25:45,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:45,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:45,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:25:45,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 21:25:45,431 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:25:45,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:45,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1859420282, now seen corresponding path program 1 times [2024-06-27 21:25:45,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:45,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108505426] [2024-06-27 21:25:45,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:45,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:45,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:46,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:25:46,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:46,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108505426] [2024-06-27 21:25:46,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108505426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:46,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:46,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:25:46,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242627419] [2024-06-27 21:25:46,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:46,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:25:46,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:46,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:25:46,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:25:46,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:25:46,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 381 transitions, 6536 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:46,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:46,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:25:46,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:47,147 INFO L124 PetriNetUnfolderBase]: 2899/4338 cut-off events. [2024-06-27 21:25:47,148 INFO L125 PetriNetUnfolderBase]: For 231590/231594 co-relation queries the response was YES. [2024-06-27 21:25:47,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38217 conditions, 4338 events. 2899/4338 cut-off events. For 231590/231594 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 22121 event pairs, 885 based on Foata normal form. 8/4345 useless extension candidates. Maximal degree in co-relation 38106. Up to 4229 conditions per place. [2024-06-27 21:25:47,190 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 385 selfloop transitions, 28 changer transitions 0/416 dead transitions. [2024-06-27 21:25:47,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 416 transitions, 7528 flow [2024-06-27 21:25:47,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:25:47,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:25:47,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2024-06-27 21:25:47,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-06-27 21:25:47,194 INFO L175 Difference]: Start difference. First operand has 243 places, 381 transitions, 6536 flow. Second operand 10 states and 155 transitions. [2024-06-27 21:25:47,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 416 transitions, 7528 flow [2024-06-27 21:25:47,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 416 transitions, 7349 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 21:25:47,672 INFO L231 Difference]: Finished difference. Result has 247 places, 383 transitions, 6456 flow [2024-06-27 21:25:47,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6357, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6456, PETRI_PLACES=247, PETRI_TRANSITIONS=383} [2024-06-27 21:25:47,673 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 206 predicate places. [2024-06-27 21:25:47,673 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 383 transitions, 6456 flow [2024-06-27 21:25:47,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:47,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:47,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:25:47,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 21:25:47,673 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:25:47,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:47,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1029037972, now seen corresponding path program 6 times [2024-06-27 21:25:47,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:47,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194706067] [2024-06-27 21:25:47,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:47,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:47,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:48,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:25:48,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:48,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194706067] [2024-06-27 21:25:48,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194706067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:48,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:48,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:25:48,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403977396] [2024-06-27 21:25:48,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:48,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:25:48,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:48,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:25:48,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:25:48,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:25:48,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 383 transitions, 6456 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:48,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:48,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:25:48,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:49,512 INFO L124 PetriNetUnfolderBase]: 2695/4074 cut-off events. [2024-06-27 21:25:49,512 INFO L125 PetriNetUnfolderBase]: For 252170/252405 co-relation queries the response was YES. [2024-06-27 21:25:49,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37218 conditions, 4074 events. 2695/4074 cut-off events. For 252170/252405 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 20773 event pairs, 503 based on Foata normal form. 48/3997 useless extension candidates. Maximal degree in co-relation 37106. Up to 3515 conditions per place. [2024-06-27 21:25:49,558 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 218 selfloop transitions, 134 changer transitions 0/416 dead transitions. [2024-06-27 21:25:49,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 416 transitions, 7346 flow [2024-06-27 21:25:49,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:25:49,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:25:49,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 21:25:49,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-27 21:25:49,559 INFO L175 Difference]: Start difference. First operand has 247 places, 383 transitions, 6456 flow. Second operand 9 states and 156 transitions. [2024-06-27 21:25:49,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 416 transitions, 7346 flow [2024-06-27 21:25:50,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 416 transitions, 7265 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-27 21:25:50,042 INFO L231 Difference]: Finished difference. Result has 248 places, 385 transitions, 6713 flow [2024-06-27 21:25:50,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6375, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6713, PETRI_PLACES=248, PETRI_TRANSITIONS=385} [2024-06-27 21:25:50,043 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 207 predicate places. [2024-06-27 21:25:50,043 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 385 transitions, 6713 flow [2024-06-27 21:25:50,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:50,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:50,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:25:50,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 21:25:50,043 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:25:50,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:50,044 INFO L85 PathProgramCache]: Analyzing trace with hash 454461134, now seen corresponding path program 7 times [2024-06-27 21:25:50,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:50,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956175554] [2024-06-27 21:25:50,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:50,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:50,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:50,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:25:50,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:50,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956175554] [2024-06-27 21:25:50,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956175554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:50,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:50,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:25:50,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191688766] [2024-06-27 21:25:50,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:50,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:25:50,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:50,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:25:50,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:25:50,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:25:50,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 385 transitions, 6713 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:50,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:50,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:25:50,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:51,688 INFO L124 PetriNetUnfolderBase]: 2718/4110 cut-off events. [2024-06-27 21:25:51,688 INFO L125 PetriNetUnfolderBase]: For 274767/275022 co-relation queries the response was YES. [2024-06-27 21:25:51,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38089 conditions, 4110 events. 2718/4110 cut-off events. For 274767/275022 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 21008 event pairs, 540 based on Foata normal form. 129/4117 useless extension candidates. Maximal degree in co-relation 37976. Up to 3465 conditions per place. [2024-06-27 21:25:51,741 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 250 selfloop transitions, 101 changer transitions 0/415 dead transitions. [2024-06-27 21:25:51,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 415 transitions, 7589 flow [2024-06-27 21:25:51,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:25:51,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:25:51,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 21:25:51,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428125 [2024-06-27 21:25:51,742 INFO L175 Difference]: Start difference. First operand has 248 places, 385 transitions, 6713 flow. Second operand 8 states and 137 transitions. [2024-06-27 21:25:51,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 415 transitions, 7589 flow [2024-06-27 21:25:52,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 415 transitions, 7271 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-27 21:25:52,376 INFO L231 Difference]: Finished difference. Result has 249 places, 387 transitions, 6688 flow [2024-06-27 21:25:52,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6395, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6688, PETRI_PLACES=249, PETRI_TRANSITIONS=387} [2024-06-27 21:25:52,376 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 208 predicate places. [2024-06-27 21:25:52,377 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 387 transitions, 6688 flow [2024-06-27 21:25:52,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:52,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:52,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:25:52,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 21:25:52,377 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:25:52,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:52,378 INFO L85 PathProgramCache]: Analyzing trace with hash -613312120, now seen corresponding path program 3 times [2024-06-27 21:25:52,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:52,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544932248] [2024-06-27 21:25:52,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:52,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:52,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:53,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:25:53,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:53,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544932248] [2024-06-27 21:25:53,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544932248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:53,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:53,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:25:53,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556145522] [2024-06-27 21:25:53,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:53,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:25:53,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:53,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:25:53,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:25:53,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:25:53,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 387 transitions, 6688 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:53,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:53,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:25:53,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:54,305 INFO L124 PetriNetUnfolderBase]: 2944/4415 cut-off events. [2024-06-27 21:25:54,306 INFO L125 PetriNetUnfolderBase]: For 249309/249313 co-relation queries the response was YES. [2024-06-27 21:25:54,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39610 conditions, 4415 events. 2944/4415 cut-off events. For 249309/249313 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 22676 event pairs, 778 based on Foata normal form. 6/4420 useless extension candidates. Maximal degree in co-relation 39496. Up to 3998 conditions per place. [2024-06-27 21:25:54,355 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 314 selfloop transitions, 98 changer transitions 0/415 dead transitions. [2024-06-27 21:25:54,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 415 transitions, 7632 flow [2024-06-27 21:25:54,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:25:54,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:25:54,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 21:25:54,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-27 21:25:54,357 INFO L175 Difference]: Start difference. First operand has 249 places, 387 transitions, 6688 flow. Second operand 8 states and 132 transitions. [2024-06-27 21:25:54,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 415 transitions, 7632 flow [2024-06-27 21:25:54,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 415 transitions, 7365 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-27 21:25:54,942 INFO L231 Difference]: Finished difference. Result has 251 places, 387 transitions, 6657 flow [2024-06-27 21:25:54,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6421, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6657, PETRI_PLACES=251, PETRI_TRANSITIONS=387} [2024-06-27 21:25:54,943 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 210 predicate places. [2024-06-27 21:25:54,943 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 387 transitions, 6657 flow [2024-06-27 21:25:54,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:54,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:54,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:25:54,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 21:25:54,944 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:25:54,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:54,944 INFO L85 PathProgramCache]: Analyzing trace with hash -613312244, now seen corresponding path program 8 times [2024-06-27 21:25:54,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:54,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182212189] [2024-06-27 21:25:54,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:54,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:54,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:55,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:25:55,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:55,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182212189] [2024-06-27 21:25:55,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182212189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:55,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:55,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:25:55,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082628945] [2024-06-27 21:25:55,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:55,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:25:55,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:55,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:25:55,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:25:55,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:25:55,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 387 transitions, 6657 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:55,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:55,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:25:55,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:56,753 INFO L124 PetriNetUnfolderBase]: 2724/4141 cut-off events. [2024-06-27 21:25:56,753 INFO L125 PetriNetUnfolderBase]: For 257008/257285 co-relation queries the response was YES. [2024-06-27 21:25:56,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37490 conditions, 4141 events. 2724/4141 cut-off events. For 257008/257285 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 21492 event pairs, 657 based on Foata normal form. 60/4079 useless extension candidates. Maximal degree in co-relation 37375. Up to 3480 conditions per place. [2024-06-27 21:25:56,803 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 212 selfloop transitions, 141 changer transitions 0/417 dead transitions. [2024-06-27 21:25:56,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 417 transitions, 7533 flow [2024-06-27 21:25:56,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:25:56,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:25:56,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 21:25:56,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-06-27 21:25:56,809 INFO L175 Difference]: Start difference. First operand has 251 places, 387 transitions, 6657 flow. Second operand 8 states and 138 transitions. [2024-06-27 21:25:56,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 417 transitions, 7533 flow [2024-06-27 21:25:57,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 417 transitions, 7393 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 21:25:57,317 INFO L231 Difference]: Finished difference. Result has 254 places, 389 transitions, 6893 flow [2024-06-27 21:25:57,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6517, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6893, PETRI_PLACES=254, PETRI_TRANSITIONS=389} [2024-06-27 21:25:57,318 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 213 predicate places. [2024-06-27 21:25:57,318 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 389 transitions, 6893 flow [2024-06-27 21:25:57,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:57,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:57,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:25:57,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 21:25:57,318 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:25:57,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:57,319 INFO L85 PathProgramCache]: Analyzing trace with hash 457323054, now seen corresponding path program 2 times [2024-06-27 21:25:57,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:57,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256724439] [2024-06-27 21:25:57,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:57,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:57,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:57,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:25:57,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:57,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256724439] [2024-06-27 21:25:57,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256724439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:57,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:57,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:25:57,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917968948] [2024-06-27 21:25:57,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:57,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:25:57,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:57,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:25:57,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:25:58,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:25:58,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 389 transitions, 6893 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:58,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:58,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:25:58,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:58,906 INFO L124 PetriNetUnfolderBase]: 2959/4430 cut-off events. [2024-06-27 21:25:58,906 INFO L125 PetriNetUnfolderBase]: For 225353/225357 co-relation queries the response was YES. [2024-06-27 21:25:58,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38916 conditions, 4430 events. 2959/4430 cut-off events. For 225353/225357 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 22571 event pairs, 595 based on Foata normal form. 8/4437 useless extension candidates. Maximal degree in co-relation 38800. Up to 3728 conditions per place. [2024-06-27 21:25:58,956 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 281 selfloop transitions, 132 changer transitions 0/416 dead transitions. [2024-06-27 21:25:58,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 416 transitions, 7839 flow [2024-06-27 21:25:58,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:25:58,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:25:58,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 21:25:58,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-06-27 21:25:58,958 INFO L175 Difference]: Start difference. First operand has 254 places, 389 transitions, 6893 flow. Second operand 8 states and 134 transitions. [2024-06-27 21:25:58,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 416 transitions, 7839 flow [2024-06-27 21:25:59,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 416 transitions, 7507 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-27 21:25:59,493 INFO L231 Difference]: Finished difference. Result has 256 places, 389 transitions, 6855 flow [2024-06-27 21:25:59,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6561, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6855, PETRI_PLACES=256, PETRI_TRANSITIONS=389} [2024-06-27 21:25:59,493 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 215 predicate places. [2024-06-27 21:25:59,493 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 389 transitions, 6855 flow [2024-06-27 21:25:59,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:25:59,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:59,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:25:59,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 21:25:59,494 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:25:59,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:59,494 INFO L85 PathProgramCache]: Analyzing trace with hash 572609264, now seen corresponding path program 9 times [2024-06-27 21:25:59,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:59,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608111497] [2024-06-27 21:25:59,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:59,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:59,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:00,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:00,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:00,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608111497] [2024-06-27 21:26:00,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608111497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:00,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:00,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:26:00,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926652983] [2024-06-27 21:26:00,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:00,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:26:00,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:00,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:26:00,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:26:00,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:26:00,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 389 transitions, 6855 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:00,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:00,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:26:00,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:01,185 INFO L124 PetriNetUnfolderBase]: 2725/4130 cut-off events. [2024-06-27 21:26:01,185 INFO L125 PetriNetUnfolderBase]: For 231535/231801 co-relation queries the response was YES. [2024-06-27 21:26:01,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37001 conditions, 4130 events. 2725/4130 cut-off events. For 231535/231801 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 21238 event pairs, 492 based on Foata normal form. 61/4060 useless extension candidates. Maximal degree in co-relation 36884. Up to 3484 conditions per place. [2024-06-27 21:26:01,231 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 204 selfloop transitions, 150 changer transitions 0/418 dead transitions. [2024-06-27 21:26:01,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 418 transitions, 7729 flow [2024-06-27 21:26:01,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:26:01,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:26:01,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 21:26:01,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-06-27 21:26:01,232 INFO L175 Difference]: Start difference. First operand has 256 places, 389 transitions, 6855 flow. Second operand 8 states and 138 transitions. [2024-06-27 21:26:01,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 418 transitions, 7729 flow [2024-06-27 21:26:01,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 418 transitions, 7199 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-27 21:26:01,641 INFO L231 Difference]: Finished difference. Result has 253 places, 391 transitions, 6691 flow [2024-06-27 21:26:01,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6325, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6691, PETRI_PLACES=253, PETRI_TRANSITIONS=391} [2024-06-27 21:26:01,642 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 212 predicate places. [2024-06-27 21:26:01,642 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 391 transitions, 6691 flow [2024-06-27 21:26:01,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:01,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:01,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:01,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 21:26:01,642 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:01,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:01,643 INFO L85 PathProgramCache]: Analyzing trace with hash -495039866, now seen corresponding path program 2 times [2024-06-27 21:26:01,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:01,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890017324] [2024-06-27 21:26:01,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:01,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:01,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:02,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:02,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:02,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890017324] [2024-06-27 21:26:02,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890017324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:02,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:02,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:26:02,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641570993] [2024-06-27 21:26:02,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:02,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:26:02,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:02,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:26:02,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:26:02,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:26:02,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 391 transitions, 6691 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:02,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:02,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:26:02,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:03,393 INFO L124 PetriNetUnfolderBase]: 3001/4500 cut-off events. [2024-06-27 21:26:03,393 INFO L125 PetriNetUnfolderBase]: For 216956/216960 co-relation queries the response was YES. [2024-06-27 21:26:03,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38624 conditions, 4500 events. 3001/4500 cut-off events. For 216956/216960 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 23131 event pairs, 905 based on Foata normal form. 8/4507 useless extension candidates. Maximal degree in co-relation 38507. Up to 4346 conditions per place. [2024-06-27 21:26:03,442 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 382 selfloop transitions, 37 changer transitions 0/422 dead transitions. [2024-06-27 21:26:03,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 422 transitions, 7687 flow [2024-06-27 21:26:03,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:26:03,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:26:03,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-27 21:26:03,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-27 21:26:03,443 INFO L175 Difference]: Start difference. First operand has 253 places, 391 transitions, 6691 flow. Second operand 9 states and 140 transitions. [2024-06-27 21:26:03,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 422 transitions, 7687 flow [2024-06-27 21:26:03,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 422 transitions, 7345 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-27 21:26:03,957 INFO L231 Difference]: Finished difference. Result has 256 places, 393 transitions, 6473 flow [2024-06-27 21:26:03,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6349, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6473, PETRI_PLACES=256, PETRI_TRANSITIONS=393} [2024-06-27 21:26:03,957 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 215 predicate places. [2024-06-27 21:26:03,957 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 393 transitions, 6473 flow [2024-06-27 21:26:03,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:03,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:03,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:03,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 21:26:03,958 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:03,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:03,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1833868956, now seen corresponding path program 3 times [2024-06-27 21:26:03,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:03,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538823409] [2024-06-27 21:26:03,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:03,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:03,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:04,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:04,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:04,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538823409] [2024-06-27 21:26:04,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538823409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:04,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:04,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:26:04,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768436727] [2024-06-27 21:26:04,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:04,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:26:04,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:04,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:26:04,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:26:04,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:26:04,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 393 transitions, 6473 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:04,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:04,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:26:04,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:05,658 INFO L124 PetriNetUnfolderBase]: 3018/4531 cut-off events. [2024-06-27 21:26:05,658 INFO L125 PetriNetUnfolderBase]: For 214357/214365 co-relation queries the response was YES. [2024-06-27 21:26:05,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38380 conditions, 4531 events. 3018/4531 cut-off events. For 214357/214365 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 23354 event pairs, 877 based on Foata normal form. 12/4541 useless extension candidates. Maximal degree in co-relation 38262. Up to 4217 conditions per place. [2024-06-27 21:26:05,710 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 363 selfloop transitions, 65 changer transitions 0/431 dead transitions. [2024-06-27 21:26:05,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 431 transitions, 7715 flow [2024-06-27 21:26:05,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:26:05,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:26:05,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-27 21:26:05,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 21:26:05,712 INFO L175 Difference]: Start difference. First operand has 256 places, 393 transitions, 6473 flow. Second operand 9 states and 144 transitions. [2024-06-27 21:26:05,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 431 transitions, 7715 flow [2024-06-27 21:26:06,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 431 transitions, 7599 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-27 21:26:06,155 INFO L231 Difference]: Finished difference. Result has 259 places, 401 transitions, 6636 flow [2024-06-27 21:26:06,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6369, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6636, PETRI_PLACES=259, PETRI_TRANSITIONS=401} [2024-06-27 21:26:06,156 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 218 predicate places. [2024-06-27 21:26:06,156 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 401 transitions, 6636 flow [2024-06-27 21:26:06,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:06,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:06,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:06,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 21:26:06,157 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:06,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:06,157 INFO L85 PathProgramCache]: Analyzing trace with hash -49976976, now seen corresponding path program 4 times [2024-06-27 21:26:06,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:06,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900574948] [2024-06-27 21:26:06,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:06,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:06,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:06,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:06,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:06,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900574948] [2024-06-27 21:26:06,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900574948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:06,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:06,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:26:06,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651153725] [2024-06-27 21:26:06,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:06,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:26:06,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:06,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:26:06,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:26:06,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:26:06,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 401 transitions, 6636 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:06,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:06,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:26:06,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:07,897 INFO L124 PetriNetUnfolderBase]: 3035/4559 cut-off events. [2024-06-27 21:26:07,897 INFO L125 PetriNetUnfolderBase]: For 215078/215086 co-relation queries the response was YES. [2024-06-27 21:26:07,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38695 conditions, 4559 events. 3035/4559 cut-off events. For 215078/215086 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 23573 event pairs, 912 based on Foata normal form. 12/4568 useless extension candidates. Maximal degree in co-relation 38575. Up to 4332 conditions per place. [2024-06-27 21:26:07,950 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 372 selfloop transitions, 59 changer transitions 0/434 dead transitions. [2024-06-27 21:26:07,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 434 transitions, 7672 flow [2024-06-27 21:26:07,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:26:07,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:26:07,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2024-06-27 21:26:07,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-06-27 21:26:07,952 INFO L175 Difference]: Start difference. First operand has 259 places, 401 transitions, 6636 flow. Second operand 10 states and 155 transitions. [2024-06-27 21:26:07,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 434 transitions, 7672 flow [2024-06-27 21:26:08,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 434 transitions, 7569 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-27 21:26:08,448 INFO L231 Difference]: Finished difference. Result has 265 places, 403 transitions, 6703 flow [2024-06-27 21:26:08,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6545, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6703, PETRI_PLACES=265, PETRI_TRANSITIONS=403} [2024-06-27 21:26:08,448 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 224 predicate places. [2024-06-27 21:26:08,448 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 403 transitions, 6703 flow [2024-06-27 21:26:08,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:08,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:08,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:08,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 21:26:08,449 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:08,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:08,449 INFO L85 PathProgramCache]: Analyzing trace with hash -2070525684, now seen corresponding path program 10 times [2024-06-27 21:26:08,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:08,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489267180] [2024-06-27 21:26:08,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:08,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:08,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:09,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:09,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:09,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489267180] [2024-06-27 21:26:09,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489267180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:09,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:09,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:26:09,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143749094] [2024-06-27 21:26:09,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:09,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:26:09,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:09,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:26:09,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:26:09,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:26:09,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 403 transitions, 6703 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:09,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:09,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:26:09,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:10,154 INFO L124 PetriNetUnfolderBase]: 2761/4194 cut-off events. [2024-06-27 21:26:10,155 INFO L125 PetriNetUnfolderBase]: For 231513/231779 co-relation queries the response was YES. [2024-06-27 21:26:10,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36780 conditions, 4194 events. 2761/4194 cut-off events. For 231513/231779 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 21674 event pairs, 502 based on Foata normal form. 61/4118 useless extension candidates. Maximal degree in co-relation 36658. Up to 3515 conditions per place. [2024-06-27 21:26:10,205 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 204 selfloop transitions, 156 changer transitions 0/430 dead transitions. [2024-06-27 21:26:10,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 430 transitions, 7583 flow [2024-06-27 21:26:10,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:26:10,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:26:10,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 21:26:10,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428125 [2024-06-27 21:26:10,207 INFO L175 Difference]: Start difference. First operand has 265 places, 403 transitions, 6703 flow. Second operand 8 states and 137 transitions. [2024-06-27 21:26:10,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 430 transitions, 7583 flow [2024-06-27 21:26:10,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 430 transitions, 7451 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 21:26:10,725 INFO L231 Difference]: Finished difference. Result has 266 places, 405 transitions, 6945 flow [2024-06-27 21:26:10,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6571, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6945, PETRI_PLACES=266, PETRI_TRANSITIONS=405} [2024-06-27 21:26:10,726 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 225 predicate places. [2024-06-27 21:26:10,726 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 405 transitions, 6945 flow [2024-06-27 21:26:10,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:10,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:10,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:10,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 21:26:10,727 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:10,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:10,727 INFO L85 PathProgramCache]: Analyzing trace with hash -2070340986, now seen corresponding path program 5 times [2024-06-27 21:26:10,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:10,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20156282] [2024-06-27 21:26:10,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:10,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:10,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:11,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:11,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:11,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20156282] [2024-06-27 21:26:11,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20156282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:11,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:11,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:26:11,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537977919] [2024-06-27 21:26:11,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:11,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:26:11,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:11,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:26:11,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:26:11,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:26:11,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 405 transitions, 6945 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:11,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:11,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:26:11,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:12,411 INFO L124 PetriNetUnfolderBase]: 3014/4528 cut-off events. [2024-06-27 21:26:12,411 INFO L125 PetriNetUnfolderBase]: For 225487/225495 co-relation queries the response was YES. [2024-06-27 21:26:12,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38868 conditions, 4528 events. 3014/4528 cut-off events. For 225487/225495 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 23377 event pairs, 905 based on Foata normal form. 12/4537 useless extension candidates. Maximal degree in co-relation 38745. Up to 4351 conditions per place. [2024-06-27 21:26:12,466 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 387 selfloop transitions, 42 changer transitions 0/432 dead transitions. [2024-06-27 21:26:12,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 432 transitions, 7919 flow [2024-06-27 21:26:12,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:26:12,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:26:12,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-27 21:26:12,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39166666666666666 [2024-06-27 21:26:12,467 INFO L175 Difference]: Start difference. First operand has 266 places, 405 transitions, 6945 flow. Second operand 9 states and 141 transitions. [2024-06-27 21:26:12,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 432 transitions, 7919 flow [2024-06-27 21:26:13,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 432 transitions, 7551 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 21:26:13,070 INFO L231 Difference]: Finished difference. Result has 269 places, 405 transitions, 6668 flow [2024-06-27 21:26:13,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6577, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6668, PETRI_PLACES=269, PETRI_TRANSITIONS=405} [2024-06-27 21:26:13,071 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 228 predicate places. [2024-06-27 21:26:13,071 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 405 transitions, 6668 flow [2024-06-27 21:26:13,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:13,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:13,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:13,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 21:26:13,072 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:13,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:13,072 INFO L85 PathProgramCache]: Analyzing trace with hash -788681250, now seen corresponding path program 1 times [2024-06-27 21:26:13,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:13,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196309737] [2024-06-27 21:26:13,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:13,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:13,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:13,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:13,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:13,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196309737] [2024-06-27 21:26:13,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196309737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:13,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:13,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:26:13,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894114870] [2024-06-27 21:26:13,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:13,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:26:13,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:13,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:26:13,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:26:13,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:26:13,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 405 transitions, 6668 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:13,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:13,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:26:13,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:14,904 INFO L124 PetriNetUnfolderBase]: 3031/4554 cut-off events. [2024-06-27 21:26:14,904 INFO L125 PetriNetUnfolderBase]: For 231490/231496 co-relation queries the response was YES. [2024-06-27 21:26:14,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38648 conditions, 4554 events. 3031/4554 cut-off events. For 231490/231496 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 23572 event pairs, 563 based on Foata normal form. 10/4563 useless extension candidates. Maximal degree in co-relation 38524. Up to 4193 conditions per place. [2024-06-27 21:26:14,958 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 396 selfloop transitions, 59 changer transitions 0/458 dead transitions. [2024-06-27 21:26:14,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 458 transitions, 7936 flow [2024-06-27 21:26:14,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:26:14,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:26:14,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-27 21:26:14,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3975 [2024-06-27 21:26:14,960 INFO L175 Difference]: Start difference. First operand has 269 places, 405 transitions, 6668 flow. Second operand 10 states and 159 transitions. [2024-06-27 21:26:14,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 458 transitions, 7936 flow [2024-06-27 21:26:15,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 458 transitions, 7817 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 21:26:15,526 INFO L231 Difference]: Finished difference. Result has 274 places, 420 transitions, 6939 flow [2024-06-27 21:26:15,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6549, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6939, PETRI_PLACES=274, PETRI_TRANSITIONS=420} [2024-06-27 21:26:15,526 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 233 predicate places. [2024-06-27 21:26:15,526 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 420 transitions, 6939 flow [2024-06-27 21:26:15,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:15,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:15,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:15,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 21:26:15,527 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:15,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:15,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1748076050, now seen corresponding path program 2 times [2024-06-27 21:26:15,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:15,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264864408] [2024-06-27 21:26:15,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:15,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:15,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:16,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:16,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:16,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264864408] [2024-06-27 21:26:16,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264864408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:16,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:16,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:26:16,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925403884] [2024-06-27 21:26:16,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:16,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:26:16,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:16,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:26:16,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:26:16,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:26:16,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 420 transitions, 6939 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:16,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:16,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:26:16,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:17,411 INFO L124 PetriNetUnfolderBase]: 3059/4594 cut-off events. [2024-06-27 21:26:17,411 INFO L125 PetriNetUnfolderBase]: For 240628/240634 co-relation queries the response was YES. [2024-06-27 21:26:17,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39625 conditions, 4594 events. 3059/4594 cut-off events. For 240628/240634 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 23843 event pairs, 766 based on Foata normal form. 10/4603 useless extension candidates. Maximal degree in co-relation 39497. Up to 4308 conditions per place. [2024-06-27 21:26:17,467 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 403 selfloop transitions, 62 changer transitions 0/468 dead transitions. [2024-06-27 21:26:17,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 468 transitions, 8209 flow [2024-06-27 21:26:17,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:26:17,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:26:17,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-27 21:26:17,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025 [2024-06-27 21:26:17,469 INFO L175 Difference]: Start difference. First operand has 274 places, 420 transitions, 6939 flow. Second operand 10 states and 161 transitions. [2024-06-27 21:26:17,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 468 transitions, 8209 flow [2024-06-27 21:26:18,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 468 transitions, 7992 flow, removed 84 selfloop flow, removed 4 redundant places. [2024-06-27 21:26:18,089 INFO L231 Difference]: Finished difference. Result has 282 places, 430 transitions, 7084 flow [2024-06-27 21:26:18,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6806, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7084, PETRI_PLACES=282, PETRI_TRANSITIONS=430} [2024-06-27 21:26:18,089 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 241 predicate places. [2024-06-27 21:26:18,089 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 430 transitions, 7084 flow [2024-06-27 21:26:18,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:18,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:18,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:18,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 21:26:18,090 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:18,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:18,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1805159450, now seen corresponding path program 3 times [2024-06-27 21:26:18,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:18,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345415529] [2024-06-27 21:26:18,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:18,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:18,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:18,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:18,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:18,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345415529] [2024-06-27 21:26:18,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345415529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:18,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:18,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:26:18,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510157053] [2024-06-27 21:26:18,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:18,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:26:18,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:18,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:26:18,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:26:18,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:26:18,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 430 transitions, 7084 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:18,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:18,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:26:18,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:20,086 INFO L124 PetriNetUnfolderBase]: 3101/4662 cut-off events. [2024-06-27 21:26:20,087 INFO L125 PetriNetUnfolderBase]: For 252563/252567 co-relation queries the response was YES. [2024-06-27 21:26:20,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40539 conditions, 4662 events. 3101/4662 cut-off events. For 252563/252567 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 24245 event pairs, 755 based on Foata normal form. 8/4669 useless extension candidates. Maximal degree in co-relation 40407. Up to 4285 conditions per place. [2024-06-27 21:26:20,138 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 396 selfloop transitions, 76 changer transitions 0/475 dead transitions. [2024-06-27 21:26:20,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 475 transitions, 8472 flow [2024-06-27 21:26:20,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:26:20,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:26:20,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-27 21:26:20,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-27 21:26:20,140 INFO L175 Difference]: Start difference. First operand has 282 places, 430 transitions, 7084 flow. Second operand 10 states and 165 transitions. [2024-06-27 21:26:20,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 475 transitions, 8472 flow [2024-06-27 21:26:20,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 475 transitions, 8383 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-27 21:26:20,830 INFO L231 Difference]: Finished difference. Result has 289 places, 436 transitions, 7289 flow [2024-06-27 21:26:20,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6995, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7289, PETRI_PLACES=289, PETRI_TRANSITIONS=436} [2024-06-27 21:26:20,831 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 248 predicate places. [2024-06-27 21:26:20,831 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 436 transitions, 7289 flow [2024-06-27 21:26:20,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:20,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:20,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:20,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 21:26:20,832 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:20,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:20,832 INFO L85 PathProgramCache]: Analyzing trace with hash 746093120, now seen corresponding path program 4 times [2024-06-27 21:26:20,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:20,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719012472] [2024-06-27 21:26:20,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:20,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:20,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:21,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:21,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:21,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719012472] [2024-06-27 21:26:21,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719012472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:21,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:21,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:26:21,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949055589] [2024-06-27 21:26:21,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:21,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:26:21,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:21,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:26:21,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:26:21,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:26:21,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 436 transitions, 7289 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:21,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:21,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:26:21,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:22,919 INFO L124 PetriNetUnfolderBase]: 3093/4654 cut-off events. [2024-06-27 21:26:22,919 INFO L125 PetriNetUnfolderBase]: For 258787/258791 co-relation queries the response was YES. [2024-06-27 21:26:22,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40783 conditions, 4654 events. 3093/4654 cut-off events. For 258787/258791 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 24207 event pairs, 770 based on Foata normal form. 8/4661 useless extension candidates. Maximal degree in co-relation 40648. Up to 4350 conditions per place. [2024-06-27 21:26:22,982 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 393 selfloop transitions, 78 changer transitions 0/474 dead transitions. [2024-06-27 21:26:22,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 474 transitions, 8408 flow [2024-06-27 21:26:22,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:26:22,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:26:22,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-27 21:26:22,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.405 [2024-06-27 21:26:22,984 INFO L175 Difference]: Start difference. First operand has 289 places, 436 transitions, 7289 flow. Second operand 10 states and 162 transitions. [2024-06-27 21:26:22,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 474 transitions, 8408 flow [2024-06-27 21:26:23,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 474 transitions, 8206 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-27 21:26:23,939 INFO L231 Difference]: Finished difference. Result has 293 places, 437 transitions, 7280 flow [2024-06-27 21:26:23,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7107, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7280, PETRI_PLACES=293, PETRI_TRANSITIONS=437} [2024-06-27 21:26:23,940 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 252 predicate places. [2024-06-27 21:26:23,940 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 437 transitions, 7280 flow [2024-06-27 21:26:23,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:23,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:23,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:23,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 21:26:23,940 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:23,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:23,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1583964962, now seen corresponding path program 1 times [2024-06-27 21:26:23,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:23,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101153253] [2024-06-27 21:26:23,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:23,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:23,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:24,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:24,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:24,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101153253] [2024-06-27 21:26:24,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101153253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:24,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:24,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:26:24,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822719947] [2024-06-27 21:26:24,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:24,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:26:24,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:24,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:26:24,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:26:24,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:26:24,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 437 transitions, 7280 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:24,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:24,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:26:24,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:25,888 INFO L124 PetriNetUnfolderBase]: 3168/4769 cut-off events. [2024-06-27 21:26:25,889 INFO L125 PetriNetUnfolderBase]: For 284182/284188 co-relation queries the response was YES. [2024-06-27 21:26:25,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41519 conditions, 4769 events. 3168/4769 cut-off events. For 284182/284188 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 24834 event pairs, 585 based on Foata normal form. 26/4794 useless extension candidates. Maximal degree in co-relation 41382. Up to 4122 conditions per place. [2024-06-27 21:26:25,956 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 365 selfloop transitions, 110 changer transitions 0/478 dead transitions. [2024-06-27 21:26:25,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 478 transitions, 8448 flow [2024-06-27 21:26:25,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:26:25,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:26:25,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-27 21:26:25,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4225 [2024-06-27 21:26:25,960 INFO L175 Difference]: Start difference. First operand has 293 places, 437 transitions, 7280 flow. Second operand 10 states and 169 transitions. [2024-06-27 21:26:25,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 478 transitions, 8448 flow [2024-06-27 21:26:26,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 478 transitions, 8322 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 21:26:26,853 INFO L231 Difference]: Finished difference. Result has 296 places, 438 transitions, 7410 flow [2024-06-27 21:26:26,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7154, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7410, PETRI_PLACES=296, PETRI_TRANSITIONS=438} [2024-06-27 21:26:26,854 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 255 predicate places. [2024-06-27 21:26:26,854 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 438 transitions, 7410 flow [2024-06-27 21:26:26,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:26,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:26,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:26,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 21:26:26,855 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:26,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:26,855 INFO L85 PathProgramCache]: Analyzing trace with hash 594452822, now seen corresponding path program 5 times [2024-06-27 21:26:26,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:26,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283666491] [2024-06-27 21:26:26,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:26,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:26,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:27,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:27,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:27,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283666491] [2024-06-27 21:26:27,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283666491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:27,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:27,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:26:27,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389206178] [2024-06-27 21:26:27,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:27,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:26:27,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:27,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:26:27,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:26:27,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:26:27,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 438 transitions, 7410 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:27,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:27,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:26:27,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:28,775 INFO L124 PetriNetUnfolderBase]: 3207/4830 cut-off events. [2024-06-27 21:26:28,776 INFO L125 PetriNetUnfolderBase]: For 278528/278536 co-relation queries the response was YES. [2024-06-27 21:26:28,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42408 conditions, 4830 events. 3207/4830 cut-off events. For 278528/278536 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 25368 event pairs, 599 based on Foata normal form. 12/4841 useless extension candidates. Maximal degree in co-relation 42270. Up to 4541 conditions per place. [2024-06-27 21:26:28,837 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 420 selfloop transitions, 64 changer transitions 0/487 dead transitions. [2024-06-27 21:26:28,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 487 transitions, 8667 flow [2024-06-27 21:26:28,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:26:28,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:26:28,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-27 21:26:28,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.405 [2024-06-27 21:26:28,838 INFO L175 Difference]: Start difference. First operand has 296 places, 438 transitions, 7410 flow. Second operand 10 states and 162 transitions. [2024-06-27 21:26:28,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 487 transitions, 8667 flow [2024-06-27 21:26:29,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 487 transitions, 8443 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 21:26:29,643 INFO L231 Difference]: Finished difference. Result has 300 places, 451 transitions, 7523 flow [2024-06-27 21:26:29,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7186, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7523, PETRI_PLACES=300, PETRI_TRANSITIONS=451} [2024-06-27 21:26:29,644 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 259 predicate places. [2024-06-27 21:26:29,644 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 451 transitions, 7523 flow [2024-06-27 21:26:29,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:29,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:29,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:29,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 21:26:29,644 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:29,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:29,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1053766194, now seen corresponding path program 6 times [2024-06-27 21:26:29,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:29,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112712159] [2024-06-27 21:26:29,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:29,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:29,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:30,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:30,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:30,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112712159] [2024-06-27 21:26:30,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112712159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:30,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:30,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:26:30,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087911165] [2024-06-27 21:26:30,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:30,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:26:30,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:30,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:26:30,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:26:30,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:26:30,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 451 transitions, 7523 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:30,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:30,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:26:30,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:31,666 INFO L124 PetriNetUnfolderBase]: 3271/4930 cut-off events. [2024-06-27 21:26:31,668 INFO L125 PetriNetUnfolderBase]: For 294623/294631 co-relation queries the response was YES. [2024-06-27 21:26:31,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43549 conditions, 4930 events. 3271/4930 cut-off events. For 294623/294631 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 25976 event pairs, 627 based on Foata normal form. 12/4941 useless extension candidates. Maximal degree in co-relation 43408. Up to 4545 conditions per place. [2024-06-27 21:26:31,735 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 416 selfloop transitions, 79 changer transitions 0/498 dead transitions. [2024-06-27 21:26:31,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 498 transitions, 9004 flow [2024-06-27 21:26:31,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:26:31,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:26:31,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-27 21:26:31,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415 [2024-06-27 21:26:31,737 INFO L175 Difference]: Start difference. First operand has 300 places, 451 transitions, 7523 flow. Second operand 10 states and 166 transitions. [2024-06-27 21:26:31,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 498 transitions, 9004 flow [2024-06-27 21:26:32,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 498 transitions, 8904 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-27 21:26:32,686 INFO L231 Difference]: Finished difference. Result has 307 places, 461 transitions, 7779 flow [2024-06-27 21:26:32,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7423, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7779, PETRI_PLACES=307, PETRI_TRANSITIONS=461} [2024-06-27 21:26:32,687 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 266 predicate places. [2024-06-27 21:26:32,687 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 461 transitions, 7779 flow [2024-06-27 21:26:32,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:32,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:32,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:32,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 21:26:32,688 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:32,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:32,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1775868424, now seen corresponding path program 7 times [2024-06-27 21:26:32,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:32,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315536932] [2024-06-27 21:26:32,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:32,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:32,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:33,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:33,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:33,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315536932] [2024-06-27 21:26:33,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315536932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:33,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:33,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:26:33,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557797417] [2024-06-27 21:26:33,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:33,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:26:33,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:33,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:26:33,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:26:33,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:26:33,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 461 transitions, 7779 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:33,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:33,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:26:33,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:34,865 INFO L124 PetriNetUnfolderBase]: 3263/4920 cut-off events. [2024-06-27 21:26:34,866 INFO L125 PetriNetUnfolderBase]: For 301146/301154 co-relation queries the response was YES. [2024-06-27 21:26:34,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43816 conditions, 4920 events. 3263/4920 cut-off events. For 301146/301154 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 25923 event pairs, 636 based on Foata normal form. 12/4931 useless extension candidates. Maximal degree in co-relation 43672. Up to 4617 conditions per place. [2024-06-27 21:26:34,927 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 416 selfloop transitions, 78 changer transitions 0/497 dead transitions. [2024-06-27 21:26:34,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 497 transitions, 8938 flow [2024-06-27 21:26:34,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:26:34,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:26:34,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-27 21:26:34,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4075 [2024-06-27 21:26:34,929 INFO L175 Difference]: Start difference. First operand has 307 places, 461 transitions, 7779 flow. Second operand 10 states and 163 transitions. [2024-06-27 21:26:34,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 497 transitions, 8938 flow [2024-06-27 21:26:35,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 497 transitions, 8729 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-27 21:26:35,986 INFO L231 Difference]: Finished difference. Result has 311 places, 462 transitions, 7771 flow [2024-06-27 21:26:35,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7594, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7771, PETRI_PLACES=311, PETRI_TRANSITIONS=462} [2024-06-27 21:26:35,986 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 270 predicate places. [2024-06-27 21:26:35,986 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 462 transitions, 7771 flow [2024-06-27 21:26:35,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:35,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:35,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:35,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 21:26:35,987 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:35,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:35,988 INFO L85 PathProgramCache]: Analyzing trace with hash 253835444, now seen corresponding path program 8 times [2024-06-27 21:26:35,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:35,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326233183] [2024-06-27 21:26:35,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:35,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:35,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:36,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:36,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:36,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326233183] [2024-06-27 21:26:36,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326233183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:36,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:36,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:26:36,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612969537] [2024-06-27 21:26:36,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:36,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:26:36,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:36,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:26:36,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:26:36,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:26:36,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 462 transitions, 7771 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:36,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:36,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:26:36,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:38,283 INFO L124 PetriNetUnfolderBase]: 3280/4945 cut-off events. [2024-06-27 21:26:38,284 INFO L125 PetriNetUnfolderBase]: For 310587/310595 co-relation queries the response was YES. [2024-06-27 21:26:38,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44155 conditions, 4945 events. 3280/4945 cut-off events. For 310587/310595 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 26016 event pairs, 613 based on Foata normal form. 12/4956 useless extension candidates. Maximal degree in co-relation 44009. Up to 4400 conditions per place. [2024-06-27 21:26:38,340 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 401 selfloop transitions, 96 changer transitions 0/500 dead transitions. [2024-06-27 21:26:38,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 500 transitions, 8979 flow [2024-06-27 21:26:38,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:26:38,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:26:38,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-27 21:26:38,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4175 [2024-06-27 21:26:38,342 INFO L175 Difference]: Start difference. First operand has 311 places, 462 transitions, 7771 flow. Second operand 10 states and 167 transitions. [2024-06-27 21:26:38,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 500 transitions, 8979 flow [2024-06-27 21:26:39,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 500 transitions, 8849 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 21:26:39,353 INFO L231 Difference]: Finished difference. Result has 314 places, 464 transitions, 7906 flow [2024-06-27 21:26:39,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7641, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7906, PETRI_PLACES=314, PETRI_TRANSITIONS=464} [2024-06-27 21:26:39,353 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 273 predicate places. [2024-06-27 21:26:39,354 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 464 transitions, 7906 flow [2024-06-27 21:26:39,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:39,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:39,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:39,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 21:26:39,354 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:39,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:39,355 INFO L85 PathProgramCache]: Analyzing trace with hash 253831724, now seen corresponding path program 9 times [2024-06-27 21:26:39,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:39,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531619720] [2024-06-27 21:26:39,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:39,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:39,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:40,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:40,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:40,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531619720] [2024-06-27 21:26:40,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531619720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:40,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:40,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:26:40,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364588632] [2024-06-27 21:26:40,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:40,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:26:40,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:40,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:26:40,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:26:40,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:26:40,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 464 transitions, 7906 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:40,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:40,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:26:40,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:41,472 INFO L124 PetriNetUnfolderBase]: 3433/5192 cut-off events. [2024-06-27 21:26:41,472 INFO L125 PetriNetUnfolderBase]: For 359920/359928 co-relation queries the response was YES. [2024-06-27 21:26:41,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47705 conditions, 5192 events. 3433/5192 cut-off events. For 359920/359928 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 27706 event pairs, 660 based on Foata normal form. 12/5203 useless extension candidates. Maximal degree in co-relation 47558. Up to 4416 conditions per place. [2024-06-27 21:26:41,547 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 408 selfloop transitions, 100 changer transitions 0/511 dead transitions. [2024-06-27 21:26:41,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 511 transitions, 9462 flow [2024-06-27 21:26:41,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:26:41,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:26:41,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-27 21:26:41,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325 [2024-06-27 21:26:41,549 INFO L175 Difference]: Start difference. First operand has 314 places, 464 transitions, 7906 flow. Second operand 10 states and 173 transitions. [2024-06-27 21:26:41,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 511 transitions, 9462 flow [2024-06-27 21:26:42,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 511 transitions, 9215 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-27 21:26:42,856 INFO L231 Difference]: Finished difference. Result has 317 places, 469 transitions, 8020 flow [2024-06-27 21:26:42,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7659, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8020, PETRI_PLACES=317, PETRI_TRANSITIONS=469} [2024-06-27 21:26:42,857 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 276 predicate places. [2024-06-27 21:26:42,857 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 469 transitions, 8020 flow [2024-06-27 21:26:42,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:42,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:42,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:42,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 21:26:42,858 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:42,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:42,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1807239296, now seen corresponding path program 10 times [2024-06-27 21:26:42,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:42,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477430497] [2024-06-27 21:26:42,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:42,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:42,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:43,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:43,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:43,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477430497] [2024-06-27 21:26:43,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477430497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:43,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:43,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:26:43,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750873386] [2024-06-27 21:26:43,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:43,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:26:43,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:43,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:26:43,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:26:43,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:26:43,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 469 transitions, 8020 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:43,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:43,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:26:43,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:45,053 INFO L124 PetriNetUnfolderBase]: 3389/5124 cut-off events. [2024-06-27 21:26:45,053 INFO L125 PetriNetUnfolderBase]: For 365496/365504 co-relation queries the response was YES. [2024-06-27 21:26:45,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46287 conditions, 5124 events. 3389/5124 cut-off events. For 365496/365504 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 27276 event pairs, 629 based on Foata normal form. 32/5155 useless extension candidates. Maximal degree in co-relation 46138. Up to 4459 conditions per place. [2024-06-27 21:26:45,127 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 402 selfloop transitions, 105 changer transitions 0/510 dead transitions. [2024-06-27 21:26:45,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 510 transitions, 9263 flow [2024-06-27 21:26:45,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:26:45,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:26:45,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-27 21:26:45,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-27 21:26:45,129 INFO L175 Difference]: Start difference. First operand has 317 places, 469 transitions, 8020 flow. Second operand 10 states and 170 transitions. [2024-06-27 21:26:45,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 510 transitions, 9263 flow [2024-06-27 21:26:46,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 510 transitions, 9018 flow, removed 63 selfloop flow, removed 6 redundant places. [2024-06-27 21:26:46,397 INFO L231 Difference]: Finished difference. Result has 321 places, 470 transitions, 8031 flow [2024-06-27 21:26:46,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7795, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8031, PETRI_PLACES=321, PETRI_TRANSITIONS=470} [2024-06-27 21:26:46,398 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 280 predicate places. [2024-06-27 21:26:46,398 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 470 transitions, 8031 flow [2024-06-27 21:26:46,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:46,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:46,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:46,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 21:26:46,399 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:46,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:46,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1807454498, now seen corresponding path program 2 times [2024-06-27 21:26:46,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:46,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519401761] [2024-06-27 21:26:46,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:46,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:46,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:47,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:47,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:47,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519401761] [2024-06-27 21:26:47,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519401761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:47,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:47,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:26:47,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870335242] [2024-06-27 21:26:47,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:47,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:26:47,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:47,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:26:47,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:26:47,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:26:47,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 470 transitions, 8031 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:47,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:47,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:26:47,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:48,389 INFO L124 PetriNetUnfolderBase]: 3508/5325 cut-off events. [2024-06-27 21:26:48,390 INFO L125 PetriNetUnfolderBase]: For 381671/381679 co-relation queries the response was YES. [2024-06-27 21:26:48,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48120 conditions, 5325 events. 3508/5325 cut-off events. For 381671/381679 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 28711 event pairs, 638 based on Foata normal form. 24/5348 useless extension candidates. Maximal degree in co-relation 47969. Up to 4222 conditions per place. [2024-06-27 21:26:48,462 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 404 selfloop transitions, 110 changer transitions 0/517 dead transitions. [2024-06-27 21:26:48,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 517 transitions, 9569 flow [2024-06-27 21:26:48,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:26:48,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:26:48,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-27 21:26:48,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325 [2024-06-27 21:26:48,463 INFO L175 Difference]: Start difference. First operand has 321 places, 470 transitions, 8031 flow. Second operand 10 states and 173 transitions. [2024-06-27 21:26:48,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 517 transitions, 9569 flow [2024-06-27 21:26:49,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 517 transitions, 9360 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 21:26:49,846 INFO L231 Difference]: Finished difference. Result has 323 places, 472 transitions, 8118 flow [2024-06-27 21:26:49,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7822, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8118, PETRI_PLACES=323, PETRI_TRANSITIONS=472} [2024-06-27 21:26:49,846 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 282 predicate places. [2024-06-27 21:26:49,846 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 472 transitions, 8118 flow [2024-06-27 21:26:49,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:49,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:49,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:49,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 21:26:49,847 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)] === [2024-06-27 21:26:49,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:49,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1073613691, now seen corresponding path program 1 times [2024-06-27 21:26:49,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:49,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817214067] [2024-06-27 21:26:49,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:49,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:49,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:50,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:50,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:50,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817214067] [2024-06-27 21:26:50,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817214067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:50,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:50,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:26:50,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080528604] [2024-06-27 21:26:50,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:50,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:26:50,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:50,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:26:50,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:26:50,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:26:50,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 472 transitions, 8118 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:50,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:50,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:26:50,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:51,687 INFO L124 PetriNetUnfolderBase]: 3518/5343 cut-off events. [2024-06-27 21:26:51,687 INFO L125 PetriNetUnfolderBase]: For 375632/375636 co-relation queries the response was YES. [2024-06-27 21:26:51,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48524 conditions, 5343 events. 3518/5343 cut-off events. For 375632/375636 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 29012 event pairs, 1043 based on Foata normal form. 6/5348 useless extension candidates. Maximal degree in co-relation 48372. Up to 5241 conditions per place. [2024-06-27 21:26:51,909 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 460 selfloop transitions, 36 changer transitions 0/499 dead transitions. [2024-06-27 21:26:51,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 499 transitions, 9370 flow [2024-06-27 21:26:51,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:26:51,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:26:51,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-27 21:26:51,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 21:26:51,911 INFO L175 Difference]: Start difference. First operand has 323 places, 472 transitions, 8118 flow. Second operand 8 states and 128 transitions. [2024-06-27 21:26:51,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 499 transitions, 9370 flow [2024-06-27 21:26:53,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 499 transitions, 9201 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 21:26:53,240 INFO L231 Difference]: Finished difference. Result has 325 places, 478 transitions, 8110 flow [2024-06-27 21:26:53,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7949, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8110, PETRI_PLACES=325, PETRI_TRANSITIONS=478} [2024-06-27 21:26:53,242 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 284 predicate places. [2024-06-27 21:26:53,243 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 478 transitions, 8110 flow [2024-06-27 21:26:53,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:53,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:53,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:53,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 21:26:53,243 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:53,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:53,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1834683540, now seen corresponding path program 11 times [2024-06-27 21:26:53,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:53,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925012183] [2024-06-27 21:26:53,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:53,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:53,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:54,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:54,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:54,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925012183] [2024-06-27 21:26:54,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925012183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:54,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:54,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:26:54,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346879535] [2024-06-27 21:26:54,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:54,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:26:54,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:54,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:26:54,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:26:54,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:26:54,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 478 transitions, 8110 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:54,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:54,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:26:54,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:55,457 INFO L124 PetriNetUnfolderBase]: 3535/5370 cut-off events. [2024-06-27 21:26:55,457 INFO L125 PetriNetUnfolderBase]: For 390999/391007 co-relation queries the response was YES. [2024-06-27 21:26:55,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48939 conditions, 5370 events. 3535/5370 cut-off events. For 390999/391007 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 29209 event pairs, 729 based on Foata normal form. 12/5381 useless extension candidates. Maximal degree in co-relation 48785. Up to 4835 conditions per place. [2024-06-27 21:26:55,536 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 428 selfloop transitions, 84 changer transitions 0/515 dead transitions. [2024-06-27 21:26:55,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 515 transitions, 9384 flow [2024-06-27 21:26:55,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:26:55,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:26:55,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-27 21:26:55,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 21:26:55,537 INFO L175 Difference]: Start difference. First operand has 325 places, 478 transitions, 8110 flow. Second operand 9 states and 144 transitions. [2024-06-27 21:26:55,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 515 transitions, 9384 flow [2024-06-27 21:26:57,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 515 transitions, 9243 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 21:26:57,280 INFO L231 Difference]: Finished difference. Result has 329 places, 482 transitions, 8307 flow [2024-06-27 21:26:57,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7969, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8307, PETRI_PLACES=329, PETRI_TRANSITIONS=482} [2024-06-27 21:26:57,281 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 288 predicate places. [2024-06-27 21:26:57,281 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 482 transitions, 8307 flow [2024-06-27 21:26:57,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:57,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:57,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:57,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 21:26:57,281 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:57,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:57,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1832805870, now seen corresponding path program 12 times [2024-06-27 21:26:57,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:57,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045121084] [2024-06-27 21:26:57,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:57,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:57,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:58,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:58,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:58,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045121084] [2024-06-27 21:26:58,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045121084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:58,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:58,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:26:58,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054521828] [2024-06-27 21:26:58,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:58,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:26:58,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:58,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:26:58,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:26:58,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:26:58,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 482 transitions, 8307 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:58,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:58,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:26:58,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:59,481 INFO L124 PetriNetUnfolderBase]: 3552/5405 cut-off events. [2024-06-27 21:26:59,481 INFO L125 PetriNetUnfolderBase]: For 401171/401175 co-relation queries the response was YES. [2024-06-27 21:26:59,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49981 conditions, 5405 events. 3552/5405 cut-off events. For 401171/401175 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 29581 event pairs, 908 based on Foata normal form. 8/5412 useless extension candidates. Maximal degree in co-relation 49826. Up to 4904 conditions per place. [2024-06-27 21:26:59,560 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 408 selfloop transitions, 106 changer transitions 0/517 dead transitions. [2024-06-27 21:26:59,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 517 transitions, 9551 flow [2024-06-27 21:26:59,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:26:59,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:26:59,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-27 21:26:59,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40555555555555556 [2024-06-27 21:26:59,562 INFO L175 Difference]: Start difference. First operand has 329 places, 482 transitions, 8307 flow. Second operand 9 states and 146 transitions. [2024-06-27 21:26:59,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 517 transitions, 9551 flow [2024-06-27 21:27:01,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 517 transitions, 9361 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-27 21:27:01,011 INFO L231 Difference]: Finished difference. Result has 333 places, 484 transitions, 8429 flow [2024-06-27 21:27:01,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8129, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8429, PETRI_PLACES=333, PETRI_TRANSITIONS=484} [2024-06-27 21:27:01,011 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 292 predicate places. [2024-06-27 21:27:01,011 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 484 transitions, 8429 flow [2024-06-27 21:27:01,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:01,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:01,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:01,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 21:27:01,012 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:01,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:01,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1832809590, now seen corresponding path program 13 times [2024-06-27 21:27:01,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:01,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972025753] [2024-06-27 21:27:01,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:01,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:01,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:01,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:01,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:01,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972025753] [2024-06-27 21:27:01,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972025753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:01,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:01,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:27:01,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610227671] [2024-06-27 21:27:01,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:01,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:27:01,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:01,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:27:01,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:27:01,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:27:01,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 484 transitions, 8429 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:01,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:01,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:27:01,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:03,323 INFO L124 PetriNetUnfolderBase]: 3569/5428 cut-off events. [2024-06-27 21:27:03,323 INFO L125 PetriNetUnfolderBase]: For 375185/375189 co-relation queries the response was YES. [2024-06-27 21:27:03,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49741 conditions, 5428 events. 3569/5428 cut-off events. For 375185/375189 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 29761 event pairs, 880 based on Foata normal form. 8/5435 useless extension candidates. Maximal degree in co-relation 49584. Up to 4755 conditions per place. [2024-06-27 21:27:03,404 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 408 selfloop transitions, 110 changer transitions 0/521 dead transitions. [2024-06-27 21:27:03,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 521 transitions, 9711 flow [2024-06-27 21:27:03,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:27:03,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:27:03,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-27 21:27:03,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-06-27 21:27:03,405 INFO L175 Difference]: Start difference. First operand has 333 places, 484 transitions, 8429 flow. Second operand 9 states and 147 transitions. [2024-06-27 21:27:03,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 521 transitions, 9711 flow [2024-06-27 21:27:04,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 521 transitions, 9465 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-27 21:27:04,993 INFO L231 Difference]: Finished difference. Result has 336 places, 488 transitions, 8571 flow [2024-06-27 21:27:04,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8183, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8571, PETRI_PLACES=336, PETRI_TRANSITIONS=488} [2024-06-27 21:27:04,994 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 295 predicate places. [2024-06-27 21:27:04,994 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 488 transitions, 8571 flow [2024-06-27 21:27:04,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:04,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:04,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:04,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 21:27:04,995 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:04,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:04,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1745963958, now seen corresponding path program 3 times [2024-06-27 21:27:04,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:04,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579255880] [2024-06-27 21:27:04,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:04,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:05,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:05,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:05,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:05,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579255880] [2024-06-27 21:27:05,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579255880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:05,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:05,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:27:05,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907325119] [2024-06-27 21:27:05,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:05,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:27:05,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:05,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:27:05,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:27:05,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:27:05,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 488 transitions, 8571 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:05,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:05,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:27:05,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:07,506 INFO L124 PetriNetUnfolderBase]: 3644/5545 cut-off events. [2024-06-27 21:27:07,506 INFO L125 PetriNetUnfolderBase]: For 415545/415553 co-relation queries the response was YES. [2024-06-27 21:27:07,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50954 conditions, 5545 events. 3644/5545 cut-off events. For 415545/415553 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 30345 event pairs, 677 based on Foata normal form. 28/5572 useless extension candidates. Maximal degree in co-relation 50795. Up to 4567 conditions per place. [2024-06-27 21:27:07,578 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 384 selfloop transitions, 138 changer transitions 0/525 dead transitions. [2024-06-27 21:27:07,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 525 transitions, 9833 flow [2024-06-27 21:27:07,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:27:07,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:27:07,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-27 21:27:07,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2024-06-27 21:27:07,580 INFO L175 Difference]: Start difference. First operand has 336 places, 488 transitions, 8571 flow. Second operand 9 states and 152 transitions. [2024-06-27 21:27:07,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 525 transitions, 9833 flow [2024-06-27 21:27:08,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 525 transitions, 9634 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-27 21:27:08,671 INFO L231 Difference]: Finished difference. Result has 339 places, 489 transitions, 8702 flow [2024-06-27 21:27:08,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8372, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8702, PETRI_PLACES=339, PETRI_TRANSITIONS=489} [2024-06-27 21:27:08,672 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 298 predicate places. [2024-06-27 21:27:08,672 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 489 transitions, 8702 flow [2024-06-27 21:27:08,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:08,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:08,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:08,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 21:27:08,673 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:08,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:08,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1827912210, now seen corresponding path program 14 times [2024-06-27 21:27:08,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:08,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993603926] [2024-06-27 21:27:08,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:08,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:08,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:09,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:09,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:09,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993603926] [2024-06-27 21:27:09,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993603926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:09,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:09,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:27:09,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88567273] [2024-06-27 21:27:09,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:09,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:27:09,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:09,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:27:09,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:27:09,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:27:09,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 489 transitions, 8702 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:09,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:09,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:27:09,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:10,906 INFO L124 PetriNetUnfolderBase]: 3661/5572 cut-off events. [2024-06-27 21:27:10,906 INFO L125 PetriNetUnfolderBase]: For 380889/380897 co-relation queries the response was YES. [2024-06-27 21:27:10,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51510 conditions, 5572 events. 3661/5572 cut-off events. For 380889/380897 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 30573 event pairs, 692 based on Foata normal form. 12/5583 useless extension candidates. Maximal degree in co-relation 51350. Up to 4798 conditions per place. [2024-06-27 21:27:10,997 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 398 selfloop transitions, 122 changer transitions 0/523 dead transitions. [2024-06-27 21:27:10,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 523 transitions, 9956 flow [2024-06-27 21:27:10,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:27:10,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:27:10,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-27 21:27:10,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 21:27:10,999 INFO L175 Difference]: Start difference. First operand has 339 places, 489 transitions, 8702 flow. Second operand 9 states and 150 transitions. [2024-06-27 21:27:10,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 523 transitions, 9956 flow [2024-06-27 21:27:12,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 523 transitions, 9674 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-27 21:27:12,371 INFO L231 Difference]: Finished difference. Result has 341 places, 491 transitions, 8752 flow [2024-06-27 21:27:12,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8420, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8752, PETRI_PLACES=341, PETRI_TRANSITIONS=491} [2024-06-27 21:27:12,372 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 300 predicate places. [2024-06-27 21:27:12,372 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 491 transitions, 8752 flow [2024-06-27 21:27:12,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:12,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:12,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:12,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 21:27:12,373 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:12,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:12,373 INFO L85 PathProgramCache]: Analyzing trace with hash 571018790, now seen corresponding path program 15 times [2024-06-27 21:27:12,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:12,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677663500] [2024-06-27 21:27:12,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:12,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:12,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:13,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:13,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:13,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677663500] [2024-06-27 21:27:13,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677663500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:13,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:13,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:27:13,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052045840] [2024-06-27 21:27:13,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:13,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:27:13,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:13,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:27:13,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:27:13,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:27:13,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 491 transitions, 8752 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:13,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:13,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:27:13,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:14,697 INFO L124 PetriNetUnfolderBase]: 3814/5819 cut-off events. [2024-06-27 21:27:14,697 INFO L125 PetriNetUnfolderBase]: For 437707/437715 co-relation queries the response was YES. [2024-06-27 21:27:14,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54960 conditions, 5819 events. 3814/5819 cut-off events. For 437707/437715 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 32368 event pairs, 727 based on Foata normal form. 12/5830 useless extension candidates. Maximal degree in co-relation 54799. Up to 4635 conditions per place. [2024-06-27 21:27:14,788 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 400 selfloop transitions, 131 changer transitions 0/534 dead transitions. [2024-06-27 21:27:14,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 534 transitions, 10380 flow [2024-06-27 21:27:14,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:27:14,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:27:14,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 21:27:14,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-27 21:27:14,790 INFO L175 Difference]: Start difference. First operand has 341 places, 491 transitions, 8752 flow. Second operand 9 states and 156 transitions. [2024-06-27 21:27:14,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 534 transitions, 10380 flow [2024-06-27 21:27:16,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 534 transitions, 10082 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-27 21:27:16,126 INFO L231 Difference]: Finished difference. Result has 344 places, 496 transitions, 8915 flow [2024-06-27 21:27:16,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8454, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8915, PETRI_PLACES=344, PETRI_TRANSITIONS=496} [2024-06-27 21:27:16,127 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 303 predicate places. [2024-06-27 21:27:16,127 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 496 transitions, 8915 flow [2024-06-27 21:27:16,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:16,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:16,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:16,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 21:27:16,127 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:16,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:16,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1259041496, now seen corresponding path program 16 times [2024-06-27 21:27:16,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:16,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082405228] [2024-06-27 21:27:16,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:16,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:16,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:17,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:17,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:17,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082405228] [2024-06-27 21:27:17,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082405228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:17,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:17,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:27:17,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479657736] [2024-06-27 21:27:17,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:17,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:27:17,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:17,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:27:17,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:27:17,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:27:17,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 496 transitions, 8915 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:17,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:17,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:27:17,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:18,565 INFO L124 PetriNetUnfolderBase]: 3770/5751 cut-off events. [2024-06-27 21:27:18,565 INFO L125 PetriNetUnfolderBase]: For 443706/443714 co-relation queries the response was YES. [2024-06-27 21:27:18,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53531 conditions, 5751 events. 3770/5751 cut-off events. For 443706/443714 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 31852 event pairs, 693 based on Foata normal form. 32/5782 useless extension candidates. Maximal degree in co-relation 53368. Up to 4737 conditions per place. [2024-06-27 21:27:18,652 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 398 selfloop transitions, 132 changer transitions 0/533 dead transitions. [2024-06-27 21:27:18,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 533 transitions, 10200 flow [2024-06-27 21:27:18,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:27:18,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:27:18,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 21:27:18,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-27 21:27:18,654 INFO L175 Difference]: Start difference. First operand has 344 places, 496 transitions, 8915 flow. Second operand 9 states and 153 transitions. [2024-06-27 21:27:18,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 533 transitions, 10200 flow [2024-06-27 21:27:20,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 533 transitions, 9911 flow, removed 71 selfloop flow, removed 6 redundant places. [2024-06-27 21:27:20,081 INFO L231 Difference]: Finished difference. Result has 347 places, 497 transitions, 8949 flow [2024-06-27 21:27:20,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8648, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8949, PETRI_PLACES=347, PETRI_TRANSITIONS=497} [2024-06-27 21:27:20,082 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 306 predicate places. [2024-06-27 21:27:20,082 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 497 transitions, 8949 flow [2024-06-27 21:27:20,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:20,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:20,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:20,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 21:27:20,083 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:20,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:20,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1220305428, now seen corresponding path program 4 times [2024-06-27 21:27:20,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:20,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536770349] [2024-06-27 21:27:20,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:20,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:20,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:20,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:20,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:20,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536770349] [2024-06-27 21:27:20,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536770349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:20,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:20,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:27:20,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372902221] [2024-06-27 21:27:20,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:20,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:27:20,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:20,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:27:20,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:27:20,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:27:20,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 497 transitions, 8949 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:20,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:20,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:27:20,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:22,318 INFO L124 PetriNetUnfolderBase]: 3889/5952 cut-off events. [2024-06-27 21:27:22,319 INFO L125 PetriNetUnfolderBase]: For 449702/449710 co-relation queries the response was YES. [2024-06-27 21:27:22,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55452 conditions, 5952 events. 3889/5952 cut-off events. For 449702/449710 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 33291 event pairs, 696 based on Foata normal form. 24/5975 useless extension candidates. Maximal degree in co-relation 55288. Up to 4114 conditions per place. [2024-06-27 21:27:22,405 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 397 selfloop transitions, 140 changer transitions 0/540 dead transitions. [2024-06-27 21:27:22,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 540 transitions, 10547 flow [2024-06-27 21:27:22,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:27:22,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:27:22,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 21:27:22,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-27 21:27:22,406 INFO L175 Difference]: Start difference. First operand has 347 places, 497 transitions, 8949 flow. Second operand 9 states and 156 transitions. [2024-06-27 21:27:22,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 540 transitions, 10547 flow [2024-06-27 21:27:23,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 540 transitions, 10285 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 21:27:23,851 INFO L231 Difference]: Finished difference. Result has 349 places, 499 transitions, 9061 flow [2024-06-27 21:27:23,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8687, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9061, PETRI_PLACES=349, PETRI_TRANSITIONS=499} [2024-06-27 21:27:23,851 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 308 predicate places. [2024-06-27 21:27:23,851 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 499 transitions, 9061 flow [2024-06-27 21:27:23,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:23,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:23,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:23,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 21:27:23,852 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)] === [2024-06-27 21:27:23,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:23,852 INFO L85 PathProgramCache]: Analyzing trace with hash 2078616529, now seen corresponding path program 2 times [2024-06-27 21:27:23,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:23,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654175853] [2024-06-27 21:27:23,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:23,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:23,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:24,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:24,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:24,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654175853] [2024-06-27 21:27:24,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654175853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:24,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:24,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:27:24,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494758113] [2024-06-27 21:27:24,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:24,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:27:24,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:24,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:27:24,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:27:24,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:27:24,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 499 transitions, 9061 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:24,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:24,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:27:24,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:26,020 INFO L124 PetriNetUnfolderBase]: 3904/5977 cut-off events. [2024-06-27 21:27:26,020 INFO L125 PetriNetUnfolderBase]: For 443817/443821 co-relation queries the response was YES. [2024-06-27 21:27:26,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55968 conditions, 5977 events. 3904/5977 cut-off events. For 443817/443821 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 33768 event pairs, 1146 based on Foata normal form. 6/5982 useless extension candidates. Maximal degree in co-relation 55803. Up to 5868 conditions per place. [2024-06-27 21:27:26,117 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 478 selfloop transitions, 41 changer transitions 0/522 dead transitions. [2024-06-27 21:27:26,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 522 transitions, 10364 flow [2024-06-27 21:27:26,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:27:26,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:27:26,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-27 21:27:26,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2024-06-27 21:27:26,119 INFO L175 Difference]: Start difference. First operand has 349 places, 499 transitions, 9061 flow. Second operand 7 states and 113 transitions. [2024-06-27 21:27:26,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 522 transitions, 10364 flow [2024-06-27 21:27:27,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 522 transitions, 10162 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 21:27:27,477 INFO L231 Difference]: Finished difference. Result has 351 places, 505 transitions, 9054 flow [2024-06-27 21:27:27,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8861, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9054, PETRI_PLACES=351, PETRI_TRANSITIONS=505} [2024-06-27 21:27:27,477 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 310 predicate places. [2024-06-27 21:27:27,477 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 505 transitions, 9054 flow [2024-06-27 21:27:27,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:27,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:27,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:27,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 21:27:27,478 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:27,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:27,479 INFO L85 PathProgramCache]: Analyzing trace with hash -210327370, now seen corresponding path program 5 times [2024-06-27 21:27:27,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:27,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709405259] [2024-06-27 21:27:27,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:27,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:27,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:28,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:28,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:28,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709405259] [2024-06-27 21:27:28,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709405259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:28,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:28,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:27:28,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774489145] [2024-06-27 21:27:28,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:28,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:27:28,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:28,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:27:28,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:27:28,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:27:28,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 505 transitions, 9054 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:28,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:28,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:27:28,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:29,669 INFO L124 PetriNetUnfolderBase]: 4048/6217 cut-off events. [2024-06-27 21:27:29,670 INFO L125 PetriNetUnfolderBase]: For 490597/490607 co-relation queries the response was YES. [2024-06-27 21:27:29,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58391 conditions, 6217 events. 4048/6217 cut-off events. For 490597/490607 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 35251 event pairs, 702 based on Foata normal form. 26/6238 useless extension candidates. Maximal degree in co-relation 58224. Up to 3667 conditions per place. [2024-06-27 21:27:29,765 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 365 selfloop transitions, 180 changer transitions 0/548 dead transitions. [2024-06-27 21:27:29,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 548 transitions, 10710 flow [2024-06-27 21:27:29,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:27:29,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:27:29,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 21:27:29,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4361111111111111 [2024-06-27 21:27:29,767 INFO L175 Difference]: Start difference. First operand has 351 places, 505 transitions, 9054 flow. Second operand 9 states and 157 transitions. [2024-06-27 21:27:29,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 548 transitions, 10710 flow [2024-06-27 21:27:31,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 548 transitions, 10624 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-27 21:27:31,444 INFO L231 Difference]: Finished difference. Result has 356 places, 507 transitions, 9426 flow [2024-06-27 21:27:31,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8970, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9426, PETRI_PLACES=356, PETRI_TRANSITIONS=507} [2024-06-27 21:27:31,445 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 315 predicate places. [2024-06-27 21:27:31,445 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 507 transitions, 9426 flow [2024-06-27 21:27:31,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:31,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:31,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:31,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 21:27:31,446 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:31,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:31,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1994782930, now seen corresponding path program 6 times [2024-06-27 21:27:31,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:31,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701505146] [2024-06-27 21:27:31,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:31,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:31,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:32,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:32,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:32,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701505146] [2024-06-27 21:27:32,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701505146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:32,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:32,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:27:32,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301804157] [2024-06-27 21:27:32,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:32,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:27:32,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:32,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:27:32,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:27:32,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:27:32,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 507 transitions, 9426 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:32,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:32,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:27:32,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:33,900 INFO L124 PetriNetUnfolderBase]: 4140/6369 cut-off events. [2024-06-27 21:27:33,900 INFO L125 PetriNetUnfolderBase]: For 519949/519959 co-relation queries the response was YES. [2024-06-27 21:27:33,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60538 conditions, 6369 events. 4140/6369 cut-off events. For 519949/519959 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 36597 event pairs, 806 based on Foata normal form. 34/6398 useless extension candidates. Maximal degree in co-relation 60371. Up to 5234 conditions per place. [2024-06-27 21:27:33,985 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 377 selfloop transitions, 164 changer transitions 0/544 dead transitions. [2024-06-27 21:27:33,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 544 transitions, 10776 flow [2024-06-27 21:27:33,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:27:33,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:27:33,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 21:27:33,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-27 21:27:33,987 INFO L175 Difference]: Start difference. First operand has 356 places, 507 transitions, 9426 flow. Second operand 9 states and 156 transitions. [2024-06-27 21:27:33,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 544 transitions, 10776 flow [2024-06-27 21:27:35,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 544 transitions, 10537 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 21:27:35,657 INFO L231 Difference]: Finished difference. Result has 360 places, 509 transitions, 9614 flow [2024-06-27 21:27:35,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9189, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9614, PETRI_PLACES=360, PETRI_TRANSITIONS=509} [2024-06-27 21:27:35,658 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 319 predicate places. [2024-06-27 21:27:35,659 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 509 transitions, 9614 flow [2024-06-27 21:27:35,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:35,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:35,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:35,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 21:27:35,659 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:35,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:35,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1024558954, now seen corresponding path program 7 times [2024-06-27 21:27:35,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:35,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607675645] [2024-06-27 21:27:35,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:35,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:35,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:36,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:36,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:36,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607675645] [2024-06-27 21:27:36,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607675645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:36,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:36,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:27:36,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477649574] [2024-06-27 21:27:36,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:36,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:27:36,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:36,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:27:36,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:27:36,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:27:36,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 509 transitions, 9614 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:36,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:36,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:27:36,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:38,053 INFO L124 PetriNetUnfolderBase]: 4309/6648 cut-off events. [2024-06-27 21:27:38,053 INFO L125 PetriNetUnfolderBase]: For 561138/561148 co-relation queries the response was YES. [2024-06-27 21:27:38,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64347 conditions, 6648 events. 4309/6648 cut-off events. For 561138/561148 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 38681 event pairs, 825 based on Foata normal form. 26/6669 useless extension candidates. Maximal degree in co-relation 64178. Up to 5222 conditions per place. [2024-06-27 21:27:38,161 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 385 selfloop transitions, 163 changer transitions 0/551 dead transitions. [2024-06-27 21:27:38,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 551 transitions, 11250 flow [2024-06-27 21:27:38,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:27:38,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:27:38,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 21:27:38,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-27 21:27:38,164 INFO L175 Difference]: Start difference. First operand has 360 places, 509 transitions, 9614 flow. Second operand 9 states and 159 transitions. [2024-06-27 21:27:38,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 551 transitions, 11250 flow [2024-06-27 21:27:40,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 551 transitions, 10863 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-27 21:27:40,043 INFO L231 Difference]: Finished difference. Result has 362 places, 511 transitions, 9653 flow [2024-06-27 21:27:40,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9227, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9653, PETRI_PLACES=362, PETRI_TRANSITIONS=511} [2024-06-27 21:27:40,044 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 321 predicate places. [2024-06-27 21:27:40,044 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 511 transitions, 9653 flow [2024-06-27 21:27:40,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:40,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:40,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:40,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 21:27:40,048 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:40,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:40,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1281268714, now seen corresponding path program 8 times [2024-06-27 21:27:40,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:40,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254600826] [2024-06-27 21:27:40,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:40,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:40,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:40,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:40,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:40,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254600826] [2024-06-27 21:27:40,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254600826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:40,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:40,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:27:40,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278974452] [2024-06-27 21:27:40,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:40,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:27:40,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:40,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:27:40,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:27:40,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:27:40,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 511 transitions, 9653 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:40,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:40,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:27:40,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:42,582 INFO L124 PetriNetUnfolderBase]: 4351/6722 cut-off events. [2024-06-27 21:27:42,582 INFO L125 PetriNetUnfolderBase]: For 567091/567101 co-relation queries the response was YES. [2024-06-27 21:27:42,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64088 conditions, 6722 events. 4351/6722 cut-off events. For 567091/567101 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 39286 event pairs, 876 based on Foata normal form. 30/6747 useless extension candidates. Maximal degree in co-relation 63918. Up to 5862 conditions per place. [2024-06-27 21:27:42,690 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 396 selfloop transitions, 150 changer transitions 0/549 dead transitions. [2024-06-27 21:27:42,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 549 transitions, 10992 flow [2024-06-27 21:27:42,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:27:42,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:27:42,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-27 21:27:42,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-06-27 21:27:42,691 INFO L175 Difference]: Start difference. First operand has 362 places, 511 transitions, 9653 flow. Second operand 9 states and 154 transitions. [2024-06-27 21:27:42,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 549 transitions, 10992 flow [2024-06-27 21:27:44,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 549 transitions, 10726 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-27 21:27:44,439 INFO L231 Difference]: Finished difference. Result has 366 places, 514 transitions, 9768 flow [2024-06-27 21:27:44,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9403, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9768, PETRI_PLACES=366, PETRI_TRANSITIONS=514} [2024-06-27 21:27:44,440 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 325 predicate places. [2024-06-27 21:27:44,440 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 514 transitions, 9768 flow [2024-06-27 21:27:44,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:44,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:44,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:44,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 21:27:44,441 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:44,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:44,442 INFO L85 PathProgramCache]: Analyzing trace with hash 243724276, now seen corresponding path program 17 times [2024-06-27 21:27:44,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:44,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714256751] [2024-06-27 21:27:44,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:44,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:44,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:45,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:45,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:45,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714256751] [2024-06-27 21:27:45,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714256751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:45,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:45,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:27:45,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246101151] [2024-06-27 21:27:45,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:45,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:27:45,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:45,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:27:45,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:27:45,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:27:45,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 514 transitions, 9768 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:45,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:45,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:27:45,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:47,084 INFO L124 PetriNetUnfolderBase]: 4443/6874 cut-off events. [2024-06-27 21:27:47,084 INFO L125 PetriNetUnfolderBase]: For 589585/589595 co-relation queries the response was YES. [2024-06-27 21:27:47,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65609 conditions, 6874 events. 4443/6874 cut-off events. For 589585/589595 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 40455 event pairs, 903 based on Foata normal form. 34/6903 useless extension candidates. Maximal degree in co-relation 65437. Up to 5739 conditions per place. [2024-06-27 21:27:47,194 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 401 selfloop transitions, 147 changer transitions 0/551 dead transitions. [2024-06-27 21:27:47,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 551 transitions, 11136 flow [2024-06-27 21:27:47,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:27:47,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:27:47,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 21:27:47,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4388888888888889 [2024-06-27 21:27:47,196 INFO L175 Difference]: Start difference. First operand has 366 places, 514 transitions, 9768 flow. Second operand 9 states and 158 transitions. [2024-06-27 21:27:47,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 551 transitions, 11136 flow [2024-06-27 21:27:49,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 551 transitions, 10826 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 21:27:49,073 INFO L231 Difference]: Finished difference. Result has 368 places, 516 transitions, 9855 flow [2024-06-27 21:27:49,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9458, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9855, PETRI_PLACES=368, PETRI_TRANSITIONS=516} [2024-06-27 21:27:49,073 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 327 predicate places. [2024-06-27 21:27:49,074 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 516 transitions, 9855 flow [2024-06-27 21:27:49,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:49,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:49,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:49,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 21:27:49,074 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:49,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:49,075 INFO L85 PathProgramCache]: Analyzing trace with hash 243939478, now seen corresponding path program 9 times [2024-06-27 21:27:49,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:49,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958721398] [2024-06-27 21:27:49,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:49,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:49,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:49,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:49,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:49,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958721398] [2024-06-27 21:27:49,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958721398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:49,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:49,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:27:49,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474395078] [2024-06-27 21:27:49,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:49,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:27:49,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:49,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:27:49,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:27:49,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:27:49,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 516 transitions, 9855 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:49,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:49,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:27:49,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:51,719 INFO L124 PetriNetUnfolderBase]: 4501/6972 cut-off events. [2024-06-27 21:27:51,719 INFO L125 PetriNetUnfolderBase]: For 596998/597008 co-relation queries the response was YES. [2024-06-27 21:27:51,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66594 conditions, 6972 events. 4501/6972 cut-off events. For 596998/597008 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 41151 event pairs, 894 based on Foata normal form. 26/6993 useless extension candidates. Maximal degree in co-relation 66421. Up to 5513 conditions per place. [2024-06-27 21:27:51,819 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 408 selfloop transitions, 147 changer transitions 0/558 dead transitions. [2024-06-27 21:27:51,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 558 transitions, 11519 flow [2024-06-27 21:27:51,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:27:51,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:27:51,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 21:27:51,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44722222222222224 [2024-06-27 21:27:51,820 INFO L175 Difference]: Start difference. First operand has 368 places, 516 transitions, 9855 flow. Second operand 9 states and 161 transitions. [2024-06-27 21:27:51,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 558 transitions, 11519 flow [2024-06-27 21:27:53,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 558 transitions, 11160 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-27 21:27:53,711 INFO L231 Difference]: Finished difference. Result has 370 places, 517 transitions, 9846 flow [2024-06-27 21:27:53,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9496, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9846, PETRI_PLACES=370, PETRI_TRANSITIONS=517} [2024-06-27 21:27:53,711 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 329 predicate places. [2024-06-27 21:27:53,711 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 517 transitions, 9846 flow [2024-06-27 21:27:53,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:53,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:53,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:53,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 21:27:53,712 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:53,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:53,712 INFO L85 PathProgramCache]: Analyzing trace with hash 243730228, now seen corresponding path program 10 times [2024-06-27 21:27:53,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:53,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812080215] [2024-06-27 21:27:53,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:53,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:53,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:54,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:54,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:54,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812080215] [2024-06-27 21:27:54,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812080215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:54,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:54,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:27:54,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498190187] [2024-06-27 21:27:54,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:54,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:27:54,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:54,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:27:54,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:27:54,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:27:54,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 517 transitions, 9846 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:54,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:54,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:27:54,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:56,267 INFO L124 PetriNetUnfolderBase]: 4526/7019 cut-off events. [2024-06-27 21:27:56,267 INFO L125 PetriNetUnfolderBase]: For 601630/601640 co-relation queries the response was YES. [2024-06-27 21:27:56,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66124 conditions, 7019 events. 4526/7019 cut-off events. For 601630/601640 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 41660 event pairs, 950 based on Foata normal form. 30/7044 useless extension candidates. Maximal degree in co-relation 65950. Up to 6149 conditions per place. [2024-06-27 21:27:56,383 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 416 selfloop transitions, 134 changer transitions 0/553 dead transitions. [2024-06-27 21:27:56,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 553 transitions, 11180 flow [2024-06-27 21:27:56,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:27:56,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:27:56,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 21:27:56,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-06-27 21:27:56,384 INFO L175 Difference]: Start difference. First operand has 370 places, 517 transitions, 9846 flow. Second operand 9 states and 155 transitions. [2024-06-27 21:27:56,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 553 transitions, 11180 flow [2024-06-27 21:27:58,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 553 transitions, 10573 flow, removed 29 selfloop flow, removed 9 redundant places. [2024-06-27 21:27:58,374 INFO L231 Difference]: Finished difference. Result has 370 places, 518 transitions, 9571 flow [2024-06-27 21:27:58,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9249, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9571, PETRI_PLACES=370, PETRI_TRANSITIONS=518} [2024-06-27 21:27:58,375 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 329 predicate places. [2024-06-27 21:27:58,375 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 518 transitions, 9571 flow [2024-06-27 21:27:58,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:58,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:58,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:58,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 21:27:58,376 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:58,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:58,376 INFO L85 PathProgramCache]: Analyzing trace with hash 238217746, now seen corresponding path program 18 times [2024-06-27 21:27:58,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:58,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257175139] [2024-06-27 21:27:58,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:58,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:58,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:59,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:59,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:59,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257175139] [2024-06-27 21:27:59,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257175139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:59,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:59,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:27:59,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048750437] [2024-06-27 21:27:59,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:59,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:27:59,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:59,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:27:59,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:27:59,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:27:59,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 518 transitions, 9571 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:59,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:59,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:27:59,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:01,055 INFO L124 PetriNetUnfolderBase]: 4518/7007 cut-off events. [2024-06-27 21:28:01,055 INFO L125 PetriNetUnfolderBase]: For 568042/568052 co-relation queries the response was YES. [2024-06-27 21:28:01,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64277 conditions, 7007 events. 4518/7007 cut-off events. For 568042/568052 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 41599 event pairs, 913 based on Foata normal form. 14/7016 useless extension candidates. Maximal degree in co-relation 64104. Up to 5992 conditions per place. [2024-06-27 21:28:01,164 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 396 selfloop transitions, 152 changer transitions 0/551 dead transitions. [2024-06-27 21:28:01,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 551 transitions, 10895 flow [2024-06-27 21:28:01,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:28:01,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:28:01,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 21:28:01,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-27 21:28:01,166 INFO L175 Difference]: Start difference. First operand has 370 places, 518 transitions, 9571 flow. Second operand 9 states and 153 transitions. [2024-06-27 21:28:01,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 551 transitions, 10895 flow [2024-06-27 21:28:03,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 551 transitions, 10598 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-27 21:28:03,115 INFO L231 Difference]: Finished difference. Result has 371 places, 520 transitions, 9677 flow [2024-06-27 21:28:03,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9274, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9677, PETRI_PLACES=371, PETRI_TRANSITIONS=520} [2024-06-27 21:28:03,116 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 330 predicate places. [2024-06-27 21:28:03,116 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 520 transitions, 9677 flow [2024-06-27 21:28:03,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:03,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:03,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:03,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 21:28:03,116 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:03,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:03,117 INFO L85 PathProgramCache]: Analyzing trace with hash 238214026, now seen corresponding path program 19 times [2024-06-27 21:28:03,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:03,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290377601] [2024-06-27 21:28:03,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:03,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:03,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:04,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:04,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:04,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290377601] [2024-06-27 21:28:04,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290377601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:04,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:04,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:28:04,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422190013] [2024-06-27 21:28:04,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:04,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:28:04,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:04,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:28:04,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:28:04,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:28:04,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 520 transitions, 9677 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:04,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:04,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:28:04,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:05,724 INFO L124 PetriNetUnfolderBase]: 4510/6995 cut-off events. [2024-06-27 21:28:05,724 INFO L125 PetriNetUnfolderBase]: For 559366/559376 co-relation queries the response was YES. [2024-06-27 21:28:05,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63785 conditions, 6995 events. 4510/6995 cut-off events. For 559366/559376 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 41472 event pairs, 899 based on Foata normal form. 14/7004 useless extension candidates. Maximal degree in co-relation 63612. Up to 5663 conditions per place. [2024-06-27 21:28:05,833 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 397 selfloop transitions, 159 changer transitions 0/559 dead transitions. [2024-06-27 21:28:05,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 559 transitions, 11105 flow [2024-06-27 21:28:05,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:28:05,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:28:05,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 21:28:05,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4361111111111111 [2024-06-27 21:28:05,835 INFO L175 Difference]: Start difference. First operand has 371 places, 520 transitions, 9677 flow. Second operand 9 states and 157 transitions. [2024-06-27 21:28:05,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 559 transitions, 11105 flow [2024-06-27 21:28:07,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 559 transitions, 10722 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-27 21:28:07,652 INFO L231 Difference]: Finished difference. Result has 374 places, 524 transitions, 9779 flow [2024-06-27 21:28:07,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9294, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9779, PETRI_PLACES=374, PETRI_TRANSITIONS=524} [2024-06-27 21:28:07,653 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 333 predicate places. [2024-06-27 21:28:07,653 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 524 transitions, 9779 flow [2024-06-27 21:28:07,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:07,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:07,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:07,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 21:28:07,654 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)] === [2024-06-27 21:28:07,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:07,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1865060957, now seen corresponding path program 3 times [2024-06-27 21:28:07,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:07,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816958404] [2024-06-27 21:28:07,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:07,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:07,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:08,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:08,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:08,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816958404] [2024-06-27 21:28:08,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816958404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:08,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:08,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:28:08,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195133109] [2024-06-27 21:28:08,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:08,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:28:08,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:08,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:28:08,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:28:08,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:28:08,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 524 transitions, 9779 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:08,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:08,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:28:08,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:09,920 INFO L124 PetriNetUnfolderBase]: 4520/7009 cut-off events. [2024-06-27 21:28:09,920 INFO L125 PetriNetUnfolderBase]: For 569797/569801 co-relation queries the response was YES. [2024-06-27 21:28:09,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64131 conditions, 7009 events. 4520/7009 cut-off events. For 569797/569801 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 41791 event pairs, 1330 based on Foata normal form. 6/7014 useless extension candidates. Maximal degree in co-relation 63956. Up to 6896 conditions per place. [2024-06-27 21:28:10,027 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 497 selfloop transitions, 43 changer transitions 0/543 dead transitions. [2024-06-27 21:28:10,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 543 transitions, 11094 flow [2024-06-27 21:28:10,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:28:10,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:28:10,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-27 21:28:10,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-27 21:28:10,028 INFO L175 Difference]: Start difference. First operand has 374 places, 524 transitions, 9779 flow. Second operand 6 states and 102 transitions. [2024-06-27 21:28:10,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 543 transitions, 11094 flow [2024-06-27 21:28:12,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 543 transitions, 10788 flow, removed 64 selfloop flow, removed 5 redundant places. [2024-06-27 21:28:12,282 INFO L231 Difference]: Finished difference. Result has 375 places, 527 transitions, 9619 flow [2024-06-27 21:28:12,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9473, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9619, PETRI_PLACES=375, PETRI_TRANSITIONS=527} [2024-06-27 21:28:12,283 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 334 predicate places. [2024-06-27 21:28:12,283 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 527 transitions, 9619 flow [2024-06-27 21:28:12,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:12,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:12,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:12,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 21:28:12,284 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)] === [2024-06-27 21:28:12,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:12,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1144298867, now seen corresponding path program 4 times [2024-06-27 21:28:12,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:12,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297413448] [2024-06-27 21:28:12,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:12,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:12,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:12,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:12,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:12,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297413448] [2024-06-27 21:28:12,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297413448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:12,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:12,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:28:12,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261782638] [2024-06-27 21:28:12,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:12,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:28:12,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:12,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:28:12,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:28:12,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:28:12,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 527 transitions, 9619 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:12,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:12,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:28:12,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:14,661 INFO L124 PetriNetUnfolderBase]: 4514/7001 cut-off events. [2024-06-27 21:28:14,661 INFO L125 PetriNetUnfolderBase]: For 568813/568817 co-relation queries the response was YES. [2024-06-27 21:28:14,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63698 conditions, 7001 events. 4514/7001 cut-off events. For 568813/568817 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 41736 event pairs, 1330 based on Foata normal form. 6/7006 useless extension candidates. Maximal degree in co-relation 63521. Up to 6911 conditions per place. [2024-06-27 21:28:14,755 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 503 selfloop transitions, 34 changer transitions 0/540 dead transitions. [2024-06-27 21:28:14,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 540 transitions, 10745 flow [2024-06-27 21:28:14,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:28:14,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:28:14,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-27 21:28:14,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445 [2024-06-27 21:28:14,757 INFO L175 Difference]: Start difference. First operand has 375 places, 527 transitions, 9619 flow. Second operand 5 states and 89 transitions. [2024-06-27 21:28:14,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 540 transitions, 10745 flow [2024-06-27 21:28:16,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 540 transitions, 10638 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-27 21:28:16,663 INFO L231 Difference]: Finished difference. Result has 376 places, 527 transitions, 9609 flow [2024-06-27 21:28:16,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9512, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=9609, PETRI_PLACES=376, PETRI_TRANSITIONS=527} [2024-06-27 21:28:16,664 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 335 predicate places. [2024-06-27 21:28:16,664 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 527 transitions, 9609 flow [2024-06-27 21:28:16,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:16,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:16,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:16,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 21:28:16,665 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)] === [2024-06-27 21:28:16,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:16,665 INFO L85 PathProgramCache]: Analyzing trace with hash -2039154891, now seen corresponding path program 1 times [2024-06-27 21:28:16,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:16,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374143139] [2024-06-27 21:28:16,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:16,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:16,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:17,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:17,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:17,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374143139] [2024-06-27 21:28:17,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374143139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:17,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:17,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:28:17,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053872383] [2024-06-27 21:28:17,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:17,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:28:17,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:17,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:28:17,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:28:17,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:28:17,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 527 transitions, 9609 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:17,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:17,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:28:17,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:19,036 INFO L124 PetriNetUnfolderBase]: 4427/6932 cut-off events. [2024-06-27 21:28:19,036 INFO L125 PetriNetUnfolderBase]: For 604601/604628 co-relation queries the response was YES. [2024-06-27 21:28:19,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63905 conditions, 6932 events. 4427/6932 cut-off events. For 604601/604628 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 42043 event pairs, 1559 based on Foata normal form. 5/6904 useless extension candidates. Maximal degree in co-relation 63728. Up to 6623 conditions per place. [2024-06-27 21:28:19,154 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 465 selfloop transitions, 26 changer transitions 0/552 dead transitions. [2024-06-27 21:28:19,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 552 transitions, 10935 flow [2024-06-27 21:28:19,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:28:19,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:28:19,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-27 21:28:19,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-27 21:28:19,155 INFO L175 Difference]: Start difference. First operand has 376 places, 527 transitions, 9609 flow. Second operand 7 states and 118 transitions. [2024-06-27 21:28:19,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 552 transitions, 10935 flow [2024-06-27 21:28:21,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 552 transitions, 10867 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 21:28:21,271 INFO L231 Difference]: Finished difference. Result has 379 places, 533 transitions, 9741 flow [2024-06-27 21:28:21,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9541, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9741, PETRI_PLACES=379, PETRI_TRANSITIONS=533} [2024-06-27 21:28:21,271 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 338 predicate places. [2024-06-27 21:28:21,271 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 533 transitions, 9741 flow [2024-06-27 21:28:21,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:21,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:21,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:21,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 21:28:21,272 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)] === [2024-06-27 21:28:21,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:21,272 INFO L85 PathProgramCache]: Analyzing trace with hash -361056873, now seen corresponding path program 1 times [2024-06-27 21:28:21,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:21,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265754152] [2024-06-27 21:28:21,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:21,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:21,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:21,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:21,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:21,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265754152] [2024-06-27 21:28:21,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265754152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:21,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:21,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:28:21,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449187431] [2024-06-27 21:28:21,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:21,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:28:21,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:21,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:28:21,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:28:21,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:28:21,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 533 transitions, 9741 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:21,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:21,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:28:21,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:23,733 INFO L124 PetriNetUnfolderBase]: 4589/7101 cut-off events. [2024-06-27 21:28:23,733 INFO L125 PetriNetUnfolderBase]: For 599960/599968 co-relation queries the response was YES. [2024-06-27 21:28:23,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65222 conditions, 7101 events. 4589/7101 cut-off events. For 599960/599968 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 42202 event pairs, 992 based on Foata normal form. 12/7112 useless extension candidates. Maximal degree in co-relation 65044. Up to 6755 conditions per place. [2024-06-27 21:28:23,849 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 467 selfloop transitions, 99 changer transitions 0/569 dead transitions. [2024-06-27 21:28:23,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 569 transitions, 11379 flow [2024-06-27 21:28:23,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:28:23,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:28:23,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-27 21:28:23,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 21:28:23,850 INFO L175 Difference]: Start difference. First operand has 379 places, 533 transitions, 9741 flow. Second operand 9 states and 150 transitions. [2024-06-27 21:28:23,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 569 transitions, 11379 flow [2024-06-27 21:28:25,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 569 transitions, 11282 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-27 21:28:25,930 INFO L231 Difference]: Finished difference. Result has 385 places, 542 transitions, 9992 flow [2024-06-27 21:28:25,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9644, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9992, PETRI_PLACES=385, PETRI_TRANSITIONS=542} [2024-06-27 21:28:25,931 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 344 predicate places. [2024-06-27 21:28:25,931 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 542 transitions, 9992 flow [2024-06-27 21:28:25,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:25,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:25,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:25,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 21:28:25,932 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)] === [2024-06-27 21:28:25,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:25,932 INFO L85 PathProgramCache]: Analyzing trace with hash -2039034921, now seen corresponding path program 2 times [2024-06-27 21:28:25,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:25,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244581522] [2024-06-27 21:28:25,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:25,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:25,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:26,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:26,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:26,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244581522] [2024-06-27 21:28:26,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244581522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:26,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:26,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:28:26,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328686443] [2024-06-27 21:28:26,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:26,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:28:26,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:26,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:28:26,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:28:26,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:28:26,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 542 transitions, 9992 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:26,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:26,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:28:26,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:28,284 INFO L124 PetriNetUnfolderBase]: 4507/7044 cut-off events. [2024-06-27 21:28:28,284 INFO L125 PetriNetUnfolderBase]: For 648107/648134 co-relation queries the response was YES. [2024-06-27 21:28:28,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66071 conditions, 7044 events. 4507/7044 cut-off events. For 648107/648134 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 42735 event pairs, 1568 based on Foata normal form. 5/7016 useless extension candidates. Maximal degree in co-relation 65891. Up to 6745 conditions per place. [2024-06-27 21:28:28,393 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 478 selfloop transitions, 26 changer transitions 0/565 dead transitions. [2024-06-27 21:28:28,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 565 transitions, 11158 flow [2024-06-27 21:28:28,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:28:28,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:28:28,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-27 21:28:28,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2024-06-27 21:28:28,394 INFO L175 Difference]: Start difference. First operand has 385 places, 542 transitions, 9992 flow. Second operand 7 states and 113 transitions. [2024-06-27 21:28:28,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 565 transitions, 11158 flow [2024-06-27 21:28:30,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 565 transitions, 11045 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-27 21:28:30,785 INFO L231 Difference]: Finished difference. Result has 389 places, 550 transitions, 10044 flow [2024-06-27 21:28:30,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9879, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10044, PETRI_PLACES=389, PETRI_TRANSITIONS=550} [2024-06-27 21:28:30,786 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 348 predicate places. [2024-06-27 21:28:30,786 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 550 transitions, 10044 flow [2024-06-27 21:28:30,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:30,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:30,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:30,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 21:28:30,787 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)] === [2024-06-27 21:28:30,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:30,787 INFO L85 PathProgramCache]: Analyzing trace with hash -485656769, now seen corresponding path program 2 times [2024-06-27 21:28:30,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:30,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702538459] [2024-06-27 21:28:30,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:30,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:30,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:31,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:31,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:31,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702538459] [2024-06-27 21:28:31,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702538459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:31,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:31,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:28:31,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530580149] [2024-06-27 21:28:31,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:31,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:28:31,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:31,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:28:31,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:28:31,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:28:31,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 550 transitions, 10044 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:31,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:31,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:28:31,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:33,368 INFO L124 PetriNetUnfolderBase]: 4689/7251 cut-off events. [2024-06-27 21:28:33,368 INFO L125 PetriNetUnfolderBase]: For 642462/642466 co-relation queries the response was YES. [2024-06-27 21:28:33,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67011 conditions, 7251 events. 4689/7251 cut-off events. For 642462/642466 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 43280 event pairs, 1296 based on Foata normal form. 12/7262 useless extension candidates. Maximal degree in co-relation 66829. Up to 6847 conditions per place. [2024-06-27 21:28:33,469 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 476 selfloop transitions, 120 changer transitions 0/599 dead transitions. [2024-06-27 21:28:33,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 599 transitions, 11847 flow [2024-06-27 21:28:33,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:28:33,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:28:33,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 21:28:33,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-27 21:28:33,470 INFO L175 Difference]: Start difference. First operand has 389 places, 550 transitions, 10044 flow. Second operand 8 states and 136 transitions. [2024-06-27 21:28:33,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 599 transitions, 11847 flow [2024-06-27 21:28:36,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 599 transitions, 11750 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-27 21:28:36,055 INFO L231 Difference]: Finished difference. Result has 394 places, 571 transitions, 10609 flow [2024-06-27 21:28:36,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9947, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10609, PETRI_PLACES=394, PETRI_TRANSITIONS=571} [2024-06-27 21:28:36,056 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 353 predicate places. [2024-06-27 21:28:36,056 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 571 transitions, 10609 flow [2024-06-27 21:28:36,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:36,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:36,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:36,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 21:28:36,057 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)] === [2024-06-27 21:28:36,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:36,057 INFO L85 PathProgramCache]: Analyzing trace with hash -463046421, now seen corresponding path program 3 times [2024-06-27 21:28:36,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:36,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340044540] [2024-06-27 21:28:36,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:36,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:36,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:36,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:36,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:36,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340044540] [2024-06-27 21:28:36,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340044540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:36,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:36,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:28:36,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322769006] [2024-06-27 21:28:36,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:36,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:28:36,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:36,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:28:36,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:28:36,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:28:36,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 571 transitions, 10609 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:36,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:36,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:28:36,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:38,368 INFO L124 PetriNetUnfolderBase]: 4569/7131 cut-off events. [2024-06-27 21:28:38,368 INFO L125 PetriNetUnfolderBase]: For 661443/661468 co-relation queries the response was YES. [2024-06-27 21:28:38,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66958 conditions, 7131 events. 4569/7131 cut-off events. For 661443/661468 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 43198 event pairs, 1582 based on Foata normal form. 5/7103 useless extension candidates. Maximal degree in co-relation 66774. Up to 6817 conditions per place. [2024-06-27 21:28:38,487 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 496 selfloop transitions, 24 changer transitions 0/587 dead transitions. [2024-06-27 21:28:38,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 587 transitions, 11717 flow [2024-06-27 21:28:38,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:28:38,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:28:38,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-27 21:28:38,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-27 21:28:38,488 INFO L175 Difference]: Start difference. First operand has 394 places, 571 transitions, 10609 flow. Second operand 6 states and 104 transitions. [2024-06-27 21:28:38,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 587 transitions, 11717 flow [2024-06-27 21:28:41,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 587 transitions, 11468 flow, removed 61 selfloop flow, removed 4 redundant places. [2024-06-27 21:28:41,453 INFO L231 Difference]: Finished difference. Result has 396 places, 571 transitions, 10419 flow [2024-06-27 21:28:41,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10360, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10419, PETRI_PLACES=396, PETRI_TRANSITIONS=571} [2024-06-27 21:28:41,454 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 355 predicate places. [2024-06-27 21:28:41,454 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 571 transitions, 10419 flow [2024-06-27 21:28:41,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:41,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:41,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:41,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 21:28:41,454 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)] === [2024-06-27 21:28:41,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:41,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1144283987, now seen corresponding path program 1 times [2024-06-27 21:28:41,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:41,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727695224] [2024-06-27 21:28:41,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:41,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:41,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:42,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:42,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:42,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727695224] [2024-06-27 21:28:42,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727695224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:42,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:42,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:28:42,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919376705] [2024-06-27 21:28:42,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:42,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:28:42,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:42,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:28:42,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:28:42,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:28:42,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 571 transitions, 10419 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:42,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:42,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:28:42,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:44,040 INFO L124 PetriNetUnfolderBase]: 4675/7237 cut-off events. [2024-06-27 21:28:44,040 INFO L125 PetriNetUnfolderBase]: For 643022/643022 co-relation queries the response was YES. [2024-06-27 21:28:44,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66655 conditions, 7237 events. 4675/7237 cut-off events. For 643022/643022 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 43203 event pairs, 1652 based on Foata normal form. 2/7238 useless extension candidates. Maximal degree in co-relation 66470. Up to 7172 conditions per place. [2024-06-27 21:28:44,168 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 564 selfloop transitions, 14 changer transitions 0/581 dead transitions. [2024-06-27 21:28:44,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 581 transitions, 11631 flow [2024-06-27 21:28:44,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:28:44,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:28:44,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 80 transitions. [2024-06-27 21:28:44,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 21:28:44,170 INFO L175 Difference]: Start difference. First operand has 396 places, 571 transitions, 10419 flow. Second operand 5 states and 80 transitions. [2024-06-27 21:28:44,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 581 transitions, 11631 flow [2024-06-27 21:28:47,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 581 transitions, 11572 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 21:28:47,086 INFO L231 Difference]: Finished difference. Result has 396 places, 573 transitions, 10425 flow [2024-06-27 21:28:47,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10360, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=10425, PETRI_PLACES=396, PETRI_TRANSITIONS=573} [2024-06-27 21:28:47,087 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 355 predicate places. [2024-06-27 21:28:47,087 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 573 transitions, 10425 flow [2024-06-27 21:28:47,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:47,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:47,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:47,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 21:28:47,088 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:47,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:47,088 INFO L85 PathProgramCache]: Analyzing trace with hash 195274251, now seen corresponding path program 1 times [2024-06-27 21:28:47,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:47,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989624179] [2024-06-27 21:28:47,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:47,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:47,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:47,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:47,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:47,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989624179] [2024-06-27 21:28:47,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989624179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:47,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:47,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:28:47,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442724050] [2024-06-27 21:28:47,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:47,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:28:47,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:47,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:28:47,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:28:47,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:28:47,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 573 transitions, 10425 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:47,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:47,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:28:47,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:49,949 INFO L124 PetriNetUnfolderBase]: 4716/7291 cut-off events. [2024-06-27 21:28:49,949 INFO L125 PetriNetUnfolderBase]: For 672839/672847 co-relation queries the response was YES. [2024-06-27 21:28:50,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67367 conditions, 7291 events. 4716/7291 cut-off events. For 672839/672847 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 43074 event pairs, 756 based on Foata normal form. 20/7310 useless extension candidates. Maximal degree in co-relation 67181. Up to 6845 conditions per place. [2024-06-27 21:28:50,064 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 543 selfloop transitions, 67 changer transitions 0/613 dead transitions. [2024-06-27 21:28:50,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 613 transitions, 11845 flow [2024-06-27 21:28:50,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:28:50,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:28:50,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-27 21:28:50,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.395 [2024-06-27 21:28:50,066 INFO L175 Difference]: Start difference. First operand has 396 places, 573 transitions, 10425 flow. Second operand 10 states and 158 transitions. [2024-06-27 21:28:50,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 613 transitions, 11845 flow [2024-06-27 21:28:52,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 613 transitions, 11796 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 21:28:52,971 INFO L231 Difference]: Finished difference. Result has 403 places, 574 transitions, 10566 flow [2024-06-27 21:28:52,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10376, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10566, PETRI_PLACES=403, PETRI_TRANSITIONS=574} [2024-06-27 21:28:52,971 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 362 predicate places. [2024-06-27 21:28:52,972 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 574 transitions, 10566 flow [2024-06-27 21:28:52,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:52,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:52,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:52,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 21:28:52,972 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:52,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:52,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1595843291, now seen corresponding path program 2 times [2024-06-27 21:28:52,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:52,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270370879] [2024-06-27 21:28:52,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:52,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:52,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:53,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:53,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:53,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270370879] [2024-06-27 21:28:53,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270370879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:53,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:53,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:28:53,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133988790] [2024-06-27 21:28:53,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:53,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:28:53,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:53,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:28:53,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:28:54,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:28:54,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 574 transitions, 10566 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:54,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:54,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:28:54,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:56,342 INFO L124 PetriNetUnfolderBase]: 4784/7413 cut-off events. [2024-06-27 21:28:56,343 INFO L125 PetriNetUnfolderBase]: For 699582/699590 co-relation queries the response was YES. [2024-06-27 21:28:56,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68763 conditions, 7413 events. 4784/7413 cut-off events. For 699582/699590 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 44644 event pairs, 1233 based on Foata normal form. 20/7432 useless extension candidates. Maximal degree in co-relation 68576. Up to 6886 conditions per place. [2024-06-27 21:28:56,455 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 542 selfloop transitions, 80 changer transitions 0/625 dead transitions. [2024-06-27 21:28:56,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 625 transitions, 12100 flow [2024-06-27 21:28:56,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:28:56,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:28:56,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 191 transitions. [2024-06-27 21:28:56,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39791666666666664 [2024-06-27 21:28:56,457 INFO L175 Difference]: Start difference. First operand has 403 places, 574 transitions, 10566 flow. Second operand 12 states and 191 transitions. [2024-06-27 21:28:56,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 625 transitions, 12100 flow [2024-06-27 21:28:58,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 625 transitions, 11904 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-27 21:28:58,989 INFO L231 Difference]: Finished difference. Result has 408 places, 576 transitions, 10643 flow [2024-06-27 21:28:58,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10408, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10643, PETRI_PLACES=408, PETRI_TRANSITIONS=576} [2024-06-27 21:28:58,989 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 367 predicate places. [2024-06-27 21:28:58,990 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 576 transitions, 10643 flow [2024-06-27 21:28:58,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:58,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:58,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:58,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 21:28:58,990 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:58,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:58,991 INFO L85 PathProgramCache]: Analyzing trace with hash 125484243, now seen corresponding path program 3 times [2024-06-27 21:28:58,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:58,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070852322] [2024-06-27 21:28:58,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:58,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:58,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:00,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:00,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:00,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070852322] [2024-06-27 21:29:00,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070852322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:00,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:00,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:29:00,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360965002] [2024-06-27 21:29:00,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:00,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:29:00,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:00,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:29:00,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:29:00,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:29:00,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 576 transitions, 10643 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:00,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:00,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:29:00,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:02,372 INFO L124 PetriNetUnfolderBase]: 4825/7490 cut-off events. [2024-06-27 21:29:02,372 INFO L125 PetriNetUnfolderBase]: For 712264/712268 co-relation queries the response was YES. [2024-06-27 21:29:02,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69066 conditions, 7490 events. 4825/7490 cut-off events. For 712264/712268 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 45196 event pairs, 1297 based on Foata normal form. 16/7505 useless extension candidates. Maximal degree in co-relation 68878. Up to 7104 conditions per place. [2024-06-27 21:29:02,482 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 537 selfloop transitions, 81 changer transitions 0/621 dead transitions. [2024-06-27 21:29:02,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 621 transitions, 12093 flow [2024-06-27 21:29:02,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:29:02,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:29:02,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 177 transitions. [2024-06-27 21:29:02,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4022727272727273 [2024-06-27 21:29:02,483 INFO L175 Difference]: Start difference. First operand has 408 places, 576 transitions, 10643 flow. Second operand 11 states and 177 transitions. [2024-06-27 21:29:02,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 621 transitions, 12093 flow [2024-06-27 21:29:05,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 621 transitions, 11884 flow, removed 18 selfloop flow, removed 11 redundant places. [2024-06-27 21:29:05,515 INFO L231 Difference]: Finished difference. Result has 408 places, 577 transitions, 10635 flow [2024-06-27 21:29:05,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10434, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10635, PETRI_PLACES=408, PETRI_TRANSITIONS=577} [2024-06-27 21:29:05,515 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 367 predicate places. [2024-06-27 21:29:05,515 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 577 transitions, 10635 flow [2024-06-27 21:29:05,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:05,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:05,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:05,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 21:29:05,516 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:05,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:05,516 INFO L85 PathProgramCache]: Analyzing trace with hash 156649473, now seen corresponding path program 4 times [2024-06-27 21:29:05,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:05,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597376488] [2024-06-27 21:29:05,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:05,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:05,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:06,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:06,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:06,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597376488] [2024-06-27 21:29:06,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597376488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:06,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:06,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:29:06,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695146515] [2024-06-27 21:29:06,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:06,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:29:06,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:06,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:29:06,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:29:06,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:29:06,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 577 transitions, 10635 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:06,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:06,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:29:06,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:08,798 INFO L124 PetriNetUnfolderBase]: 4866/7559 cut-off events. [2024-06-27 21:29:08,798 INFO L125 PetriNetUnfolderBase]: For 729629/729633 co-relation queries the response was YES. [2024-06-27 21:29:08,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69601 conditions, 7559 events. 4866/7559 cut-off events. For 729629/729633 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 45729 event pairs, 1279 based on Foata normal form. 16/7574 useless extension candidates. Maximal degree in co-relation 69412. Up to 7097 conditions per place. [2024-06-27 21:29:08,928 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 536 selfloop transitions, 83 changer transitions 0/622 dead transitions. [2024-06-27 21:29:08,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 622 transitions, 12103 flow [2024-06-27 21:29:08,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:29:08,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:29:08,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 178 transitions. [2024-06-27 21:29:08,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40454545454545454 [2024-06-27 21:29:08,930 INFO L175 Difference]: Start difference. First operand has 408 places, 577 transitions, 10635 flow. Second operand 11 states and 178 transitions. [2024-06-27 21:29:08,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 622 transitions, 12103 flow [2024-06-27 21:29:12,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 622 transitions, 11928 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-27 21:29:12,176 INFO L231 Difference]: Finished difference. Result has 410 places, 578 transitions, 10685 flow [2024-06-27 21:29:12,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10460, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10685, PETRI_PLACES=410, PETRI_TRANSITIONS=578} [2024-06-27 21:29:12,177 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 369 predicate places. [2024-06-27 21:29:12,177 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 578 transitions, 10685 flow [2024-06-27 21:29:12,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:12,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:12,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:12,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 21:29:12,178 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:12,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:12,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1692987175, now seen corresponding path program 5 times [2024-06-27 21:29:12,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:12,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049488823] [2024-06-27 21:29:12,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:12,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:12,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:13,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:13,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:13,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049488823] [2024-06-27 21:29:13,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049488823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:13,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:13,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:29:13,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805011473] [2024-06-27 21:29:13,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:13,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:29:13,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:13,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:29:13,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:29:13,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:29:13,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 578 transitions, 10685 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:13,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:13,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:29:13,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:15,266 INFO L124 PetriNetUnfolderBase]: 4934/7667 cut-off events. [2024-06-27 21:29:15,266 INFO L125 PetriNetUnfolderBase]: For 752338/752346 co-relation queries the response was YES. [2024-06-27 21:29:15,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70738 conditions, 7667 events. 4934/7667 cut-off events. For 752338/752346 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 46491 event pairs, 1083 based on Foata normal form. 20/7686 useless extension candidates. Maximal degree in co-relation 70548. Up to 7180 conditions per place. [2024-06-27 21:29:15,397 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 537 selfloop transitions, 82 changer transitions 0/622 dead transitions. [2024-06-27 21:29:15,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 622 transitions, 12196 flow [2024-06-27 21:29:15,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:29:15,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:29:15,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 179 transitions. [2024-06-27 21:29:15,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4068181818181818 [2024-06-27 21:29:15,399 INFO L175 Difference]: Start difference. First operand has 410 places, 578 transitions, 10685 flow. Second operand 11 states and 179 transitions. [2024-06-27 21:29:15,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 622 transitions, 12196 flow [2024-06-27 21:29:18,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 622 transitions, 11933 flow, removed 40 selfloop flow, removed 10 redundant places. [2024-06-27 21:29:18,759 INFO L231 Difference]: Finished difference. Result has 411 places, 580 transitions, 10703 flow [2024-06-27 21:29:18,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10463, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10703, PETRI_PLACES=411, PETRI_TRANSITIONS=580} [2024-06-27 21:29:18,760 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 370 predicate places. [2024-06-27 21:29:18,760 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 580 transitions, 10703 flow [2024-06-27 21:29:18,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:18,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:18,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:18,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 21:29:18,760 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:18,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:18,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1760821505, now seen corresponding path program 6 times [2024-06-27 21:29:18,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:18,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092191983] [2024-06-27 21:29:18,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:18,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:18,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:19,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:19,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:19,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092191983] [2024-06-27 21:29:19,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092191983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:19,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:19,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:29:19,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106921577] [2024-06-27 21:29:19,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:19,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:29:19,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:19,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:29:19,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:29:19,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:29:19,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 580 transitions, 10703 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:19,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:19,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:29:19,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:21,672 INFO L124 PetriNetUnfolderBase]: 4914/7635 cut-off events. [2024-06-27 21:29:21,672 INFO L125 PetriNetUnfolderBase]: For 731351/731359 co-relation queries the response was YES. [2024-06-27 21:29:21,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69492 conditions, 7635 events. 4914/7635 cut-off events. For 731351/731359 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 46108 event pairs, 1052 based on Foata normal form. 20/7654 useless extension candidates. Maximal degree in co-relation 69301. Up to 6948 conditions per place. [2024-06-27 21:29:21,804 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 503 selfloop transitions, 113 changer transitions 0/619 dead transitions. [2024-06-27 21:29:21,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 619 transitions, 12119 flow [2024-06-27 21:29:21,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:29:21,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:29:21,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-27 21:29:21,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41 [2024-06-27 21:29:21,806 INFO L175 Difference]: Start difference. First operand has 411 places, 580 transitions, 10703 flow. Second operand 10 states and 164 transitions. [2024-06-27 21:29:21,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 619 transitions, 12119 flow [2024-06-27 21:29:24,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 619 transitions, 11917 flow, removed 21 selfloop flow, removed 9 redundant places. [2024-06-27 21:29:24,797 INFO L231 Difference]: Finished difference. Result has 413 places, 581 transitions, 10782 flow [2024-06-27 21:29:24,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10501, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10782, PETRI_PLACES=413, PETRI_TRANSITIONS=581} [2024-06-27 21:29:24,798 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 372 predicate places. [2024-06-27 21:29:24,798 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 581 transitions, 10782 flow [2024-06-27 21:29:24,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:24,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:24,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:24,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 21:29:24,799 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:24,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:24,799 INFO L85 PathProgramCache]: Analyzing trace with hash -721150327, now seen corresponding path program 7 times [2024-06-27 21:29:24,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:24,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126216866] [2024-06-27 21:29:24,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:24,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:24,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:25,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:25,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:25,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126216866] [2024-06-27 21:29:25,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126216866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:25,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:25,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:29:25,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753978567] [2024-06-27 21:29:25,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:25,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:29:25,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:25,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:29:25,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:29:25,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:29:25,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 581 transitions, 10782 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:25,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:25,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:29:25,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:28,008 INFO L124 PetriNetUnfolderBase]: 4955/7706 cut-off events. [2024-06-27 21:29:28,009 INFO L125 PetriNetUnfolderBase]: For 750215/750223 co-relation queries the response was YES. [2024-06-27 21:29:28,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70281 conditions, 7706 events. 4955/7706 cut-off events. For 750215/750223 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 46698 event pairs, 1083 based on Foata normal form. 20/7725 useless extension candidates. Maximal degree in co-relation 70088. Up to 6913 conditions per place. [2024-06-27 21:29:28,141 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 523 selfloop transitions, 103 changer transitions 0/629 dead transitions. [2024-06-27 21:29:28,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 629 transitions, 12312 flow [2024-06-27 21:29:28,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:29:28,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:29:28,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 186 transitions. [2024-06-27 21:29:28,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42272727272727273 [2024-06-27 21:29:28,143 INFO L175 Difference]: Start difference. First operand has 413 places, 581 transitions, 10782 flow. Second operand 11 states and 186 transitions. [2024-06-27 21:29:28,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 629 transitions, 12312 flow [2024-06-27 21:29:31,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 629 transitions, 12055 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-27 21:29:31,833 INFO L231 Difference]: Finished difference. Result has 416 places, 582 transitions, 10793 flow [2024-06-27 21:29:31,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10525, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10793, PETRI_PLACES=416, PETRI_TRANSITIONS=582} [2024-06-27 21:29:31,833 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 375 predicate places. [2024-06-27 21:29:31,834 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 582 transitions, 10793 flow [2024-06-27 21:29:31,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:31,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:31,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:31,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 21:29:31,834 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)] === [2024-06-27 21:29:31,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:31,834 INFO L85 PathProgramCache]: Analyzing trace with hash -385083423, now seen corresponding path program 3 times [2024-06-27 21:29:31,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:31,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323868491] [2024-06-27 21:29:31,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:31,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:31,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:32,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:32,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:32,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323868491] [2024-06-27 21:29:32,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323868491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:32,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:32,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:29:32,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218253082] [2024-06-27 21:29:32,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:32,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:29:32,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:32,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:29:32,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:29:32,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:29:32,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 582 transitions, 10793 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:32,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:32,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:29:32,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:34,459 INFO L124 PetriNetUnfolderBase]: 4943/7690 cut-off events. [2024-06-27 21:29:34,459 INFO L125 PetriNetUnfolderBase]: For 717417/717425 co-relation queries the response was YES. [2024-06-27 21:29:34,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69741 conditions, 7690 events. 4943/7690 cut-off events. For 717417/717425 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 46593 event pairs, 1122 based on Foata normal form. 12/7701 useless extension candidates. Maximal degree in co-relation 69547. Up to 7304 conditions per place. [2024-06-27 21:29:34,584 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 500 selfloop transitions, 108 changer transitions 0/611 dead transitions. [2024-06-27 21:29:34,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 611 transitions, 12283 flow [2024-06-27 21:29:34,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:29:34,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:29:34,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-27 21:29:34,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2024-06-27 21:29:34,585 INFO L175 Difference]: Start difference. First operand has 416 places, 582 transitions, 10793 flow. Second operand 9 states and 151 transitions. [2024-06-27 21:29:34,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 611 transitions, 12283 flow [2024-06-27 21:29:38,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 611 transitions, 11987 flow, removed 46 selfloop flow, removed 9 redundant places. [2024-06-27 21:29:38,241 INFO L231 Difference]: Finished difference. Result has 416 places, 582 transitions, 10724 flow [2024-06-27 21:29:38,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10499, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10724, PETRI_PLACES=416, PETRI_TRANSITIONS=582} [2024-06-27 21:29:38,241 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 375 predicate places. [2024-06-27 21:29:38,242 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 582 transitions, 10724 flow [2024-06-27 21:29:38,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:38,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:38,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:38,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 21:29:38,242 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:38,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:38,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1666439451, now seen corresponding path program 8 times [2024-06-27 21:29:38,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:38,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903770048] [2024-06-27 21:29:38,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:38,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:38,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:39,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:39,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:39,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903770048] [2024-06-27 21:29:39,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903770048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:39,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:39,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:29:39,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42778839] [2024-06-27 21:29:39,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:39,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:29:39,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:39,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:29:39,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:29:39,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:29:39,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 582 transitions, 10724 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:39,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:39,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:29:39,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:41,168 INFO L124 PetriNetUnfolderBase]: 4984/7759 cut-off events. [2024-06-27 21:29:41,168 INFO L125 PetriNetUnfolderBase]: For 732200/732208 co-relation queries the response was YES. [2024-06-27 21:29:41,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69617 conditions, 7759 events. 4984/7759 cut-off events. For 732200/732208 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 46979 event pairs, 800 based on Foata normal form. 20/7778 useless extension candidates. Maximal degree in co-relation 69422. Up to 6962 conditions per place. [2024-06-27 21:29:41,293 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 530 selfloop transitions, 84 changer transitions 0/617 dead transitions. [2024-06-27 21:29:41,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 617 transitions, 12144 flow [2024-06-27 21:29:41,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:29:41,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:29:41,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-27 21:29:41,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3972222222222222 [2024-06-27 21:29:41,294 INFO L175 Difference]: Start difference. First operand has 416 places, 582 transitions, 10724 flow. Second operand 9 states and 143 transitions. [2024-06-27 21:29:41,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 617 transitions, 12144 flow [2024-06-27 21:29:44,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 617 transitions, 11967 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 21:29:44,627 INFO L231 Difference]: Finished difference. Result has 419 places, 583 transitions, 10784 flow [2024-06-27 21:29:44,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10547, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10784, PETRI_PLACES=419, PETRI_TRANSITIONS=583} [2024-06-27 21:29:44,628 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 378 predicate places. [2024-06-27 21:29:44,628 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 583 transitions, 10784 flow [2024-06-27 21:29:44,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:44,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:44,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:44,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 21:29:44,629 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:44,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:44,629 INFO L85 PathProgramCache]: Analyzing trace with hash 968276589, now seen corresponding path program 9 times [2024-06-27 21:29:44,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:44,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667139447] [2024-06-27 21:29:44,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:44,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:44,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:45,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:45,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:45,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667139447] [2024-06-27 21:29:45,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667139447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:45,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:45,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:29:45,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786749637] [2024-06-27 21:29:45,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:45,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:29:45,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:45,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:29:45,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:29:45,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:29:45,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 583 transitions, 10784 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:45,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:45,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:29:45,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:47,854 INFO L124 PetriNetUnfolderBase]: 5025/7840 cut-off events. [2024-06-27 21:29:47,854 INFO L125 PetriNetUnfolderBase]: For 753227/753231 co-relation queries the response was YES. [2024-06-27 21:29:47,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70512 conditions, 7840 events. 5025/7840 cut-off events. For 753227/753231 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 48075 event pairs, 1261 based on Foata normal form. 16/7855 useless extension candidates. Maximal degree in co-relation 70317. Up to 6921 conditions per place. [2024-06-27 21:29:47,981 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 507 selfloop transitions, 114 changer transitions 0/624 dead transitions. [2024-06-27 21:29:47,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 624 transitions, 12248 flow [2024-06-27 21:29:47,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:29:47,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:29:47,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-27 21:29:47,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.405 [2024-06-27 21:29:47,983 INFO L175 Difference]: Start difference. First operand has 419 places, 583 transitions, 10784 flow. Second operand 10 states and 162 transitions. [2024-06-27 21:29:47,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 624 transitions, 12248 flow [2024-06-27 21:29:51,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 624 transitions, 12037 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-27 21:29:51,666 INFO L231 Difference]: Finished difference. Result has 422 places, 584 transitions, 10869 flow [2024-06-27 21:29:51,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10577, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10869, PETRI_PLACES=422, PETRI_TRANSITIONS=584} [2024-06-27 21:29:51,667 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 381 predicate places. [2024-06-27 21:29:51,667 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 584 transitions, 10869 flow [2024-06-27 21:29:51,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:51,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:51,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:51,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 21:29:51,668 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:51,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:51,668 INFO L85 PathProgramCache]: Analyzing trace with hash 968391909, now seen corresponding path program 10 times [2024-06-27 21:29:51,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:51,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147398298] [2024-06-27 21:29:51,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:51,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:51,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:52,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:52,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:52,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147398298] [2024-06-27 21:29:52,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147398298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:52,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:52,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:29:52,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307585571] [2024-06-27 21:29:52,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:52,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:29:52,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:52,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:29:52,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:29:52,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:29:52,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 584 transitions, 10869 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:52,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:52,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:29:52,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:55,104 INFO L124 PetriNetUnfolderBase]: 5107/7984 cut-off events. [2024-06-27 21:29:55,104 INFO L125 PetriNetUnfolderBase]: For 735214/735218 co-relation queries the response was YES. [2024-06-27 21:29:55,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70993 conditions, 7984 events. 5107/7984 cut-off events. For 735214/735218 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 49212 event pairs, 1359 based on Foata normal form. 16/7999 useless extension candidates. Maximal degree in co-relation 70797. Up to 7272 conditions per place. [2024-06-27 21:29:55,234 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 514 selfloop transitions, 109 changer transitions 0/626 dead transitions. [2024-06-27 21:29:55,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 626 transitions, 12340 flow [2024-06-27 21:29:55,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:29:55,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:29:55,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-27 21:29:55,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025 [2024-06-27 21:29:55,235 INFO L175 Difference]: Start difference. First operand has 422 places, 584 transitions, 10869 flow. Second operand 10 states and 161 transitions. [2024-06-27 21:29:55,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 626 transitions, 12340 flow [2024-06-27 21:29:58,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 626 transitions, 12072 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-27 21:29:58,888 INFO L231 Difference]: Finished difference. Result has 424 places, 586 transitions, 10887 flow [2024-06-27 21:29:58,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10601, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10887, PETRI_PLACES=424, PETRI_TRANSITIONS=586} [2024-06-27 21:29:58,889 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 383 predicate places. [2024-06-27 21:29:58,889 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 586 transitions, 10887 flow [2024-06-27 21:29:58,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:58,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:58,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:58,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 21:29:58,890 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:58,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:58,890 INFO L85 PathProgramCache]: Analyzing trace with hash 204879103, now seen corresponding path program 11 times [2024-06-27 21:29:58,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:58,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617688099] [2024-06-27 21:29:58,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:58,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:58,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:59,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:59,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:59,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617688099] [2024-06-27 21:29:59,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617688099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:59,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:59,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:29:59,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251072875] [2024-06-27 21:29:59,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:59,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:29:59,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:59,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:29:59,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:29:59,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:29:59,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 586 transitions, 10887 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-27 21:29:59,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:59,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:29:59,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:01,977 INFO L124 PetriNetUnfolderBase]: 5087/7942 cut-off events. [2024-06-27 21:30:01,977 INFO L125 PetriNetUnfolderBase]: For 684009/684017 co-relation queries the response was YES. [2024-06-27 21:30:02,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69525 conditions, 7942 events. 5087/7942 cut-off events. For 684009/684017 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 48730 event pairs, 1050 based on Foata normal form. 20/7961 useless extension candidates. Maximal degree in co-relation 69328. Up to 6853 conditions per place. [2024-06-27 21:30:02,119 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 477 selfloop transitions, 141 changer transitions 0/621 dead transitions. [2024-06-27 21:30:02,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 621 transitions, 12292 flow [2024-06-27 21:30:02,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:30:02,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:30:02,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-27 21:30:02,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-06-27 21:30:02,120 INFO L175 Difference]: Start difference. First operand has 424 places, 586 transitions, 10887 flow. Second operand 9 states and 147 transitions. [2024-06-27 21:30:02,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 621 transitions, 12292 flow [2024-06-27 21:30:05,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 621 transitions, 12055 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-27 21:30:05,898 INFO L231 Difference]: Finished difference. Result has 426 places, 587 transitions, 11000 flow [2024-06-27 21:30:05,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10650, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11000, PETRI_PLACES=426, PETRI_TRANSITIONS=587} [2024-06-27 21:30:05,899 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 385 predicate places. [2024-06-27 21:30:05,899 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 587 transitions, 11000 flow [2024-06-27 21:30:05,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-27 21:30:05,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:05,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:05,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 21:30:05,900 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:05,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:05,900 INFO L85 PathProgramCache]: Analyzing trace with hash 830589163, now seen corresponding path program 12 times [2024-06-27 21:30:05,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:05,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701276342] [2024-06-27 21:30:05,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:05,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:05,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:06,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:06,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:06,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701276342] [2024-06-27 21:30:06,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701276342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:06,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:06,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:30:06,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659586138] [2024-06-27 21:30:06,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:06,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:30:06,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:06,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:30:06,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:30:07,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:30:07,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 587 transitions, 11000 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:07,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:07,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:30:07,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:09,271 INFO L124 PetriNetUnfolderBase]: 5128/8013 cut-off events. [2024-06-27 21:30:09,272 INFO L125 PetriNetUnfolderBase]: For 703554/703562 co-relation queries the response was YES. [2024-06-27 21:30:09,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70489 conditions, 8013 events. 5128/8013 cut-off events. For 703554/703562 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 49312 event pairs, 1114 based on Foata normal form. 20/8032 useless extension candidates. Maximal degree in co-relation 70290. Up to 7157 conditions per place. [2024-06-27 21:30:09,408 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 498 selfloop transitions, 126 changer transitions 0/627 dead transitions. [2024-06-27 21:30:09,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 627 transitions, 12464 flow [2024-06-27 21:30:09,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:30:09,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:30:09,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-27 21:30:09,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4075 [2024-06-27 21:30:09,409 INFO L175 Difference]: Start difference. First operand has 426 places, 587 transitions, 11000 flow. Second operand 10 states and 163 transitions. [2024-06-27 21:30:09,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 627 transitions, 12464 flow [2024-06-27 21:30:12,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 627 transitions, 12130 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-27 21:30:12,836 INFO L231 Difference]: Finished difference. Result has 428 places, 588 transitions, 10976 flow [2024-06-27 21:30:12,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10666, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10976, PETRI_PLACES=428, PETRI_TRANSITIONS=588} [2024-06-27 21:30:12,836 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 387 predicate places. [2024-06-27 21:30:12,836 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 588 transitions, 10976 flow [2024-06-27 21:30:12,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:12,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:12,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:12,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 21:30:12,837 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)] === [2024-06-27 21:30:12,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:12,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1432312351, now seen corresponding path program 4 times [2024-06-27 21:30:12,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:12,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449913194] [2024-06-27 21:30:12,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:12,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:12,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:13,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:13,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:13,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449913194] [2024-06-27 21:30:13,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449913194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:13,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:13,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:30:13,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838467092] [2024-06-27 21:30:13,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:13,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:30:13,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:13,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:30:13,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:30:13,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:30:13,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 588 transitions, 10976 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:13,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:13,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:30:13,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:15,695 INFO L124 PetriNetUnfolderBase]: 5190/8099 cut-off events. [2024-06-27 21:30:15,695 INFO L125 PetriNetUnfolderBase]: For 679577/679585 co-relation queries the response was YES. [2024-06-27 21:30:15,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70868 conditions, 8099 events. 5190/8099 cut-off events. For 679577/679585 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 49845 event pairs, 1177 based on Foata normal form. 12/8110 useless extension candidates. Maximal degree in co-relation 70669. Up to 7673 conditions per place. [2024-06-27 21:30:15,837 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 490 selfloop transitions, 130 changer transitions 0/623 dead transitions. [2024-06-27 21:30:15,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 623 transitions, 12802 flow [2024-06-27 21:30:15,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:30:15,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:30:15,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 21:30:15,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415625 [2024-06-27 21:30:15,838 INFO L175 Difference]: Start difference. First operand has 428 places, 588 transitions, 10976 flow. Second operand 8 states and 133 transitions. [2024-06-27 21:30:15,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 623 transitions, 12802 flow [2024-06-27 21:30:19,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 623 transitions, 12506 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-27 21:30:19,209 INFO L231 Difference]: Finished difference. Result has 430 places, 599 transitions, 11200 flow [2024-06-27 21:30:19,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10684, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11200, PETRI_PLACES=430, PETRI_TRANSITIONS=599} [2024-06-27 21:30:19,210 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 389 predicate places. [2024-06-27 21:30:19,210 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 599 transitions, 11200 flow [2024-06-27 21:30:19,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:19,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:19,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:19,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 21:30:19,211 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)] === [2024-06-27 21:30:19,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:19,211 INFO L85 PathProgramCache]: Analyzing trace with hash 12592733, now seen corresponding path program 5 times [2024-06-27 21:30:19,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:19,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607751341] [2024-06-27 21:30:19,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:19,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:19,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:19,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:19,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:19,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607751341] [2024-06-27 21:30:19,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607751341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:19,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:19,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:30:19,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035873583] [2024-06-27 21:30:19,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:19,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:30:19,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:19,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:30:19,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:30:19,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:30:19,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 599 transitions, 11200 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:19,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:19,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:30:19,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:22,258 INFO L124 PetriNetUnfolderBase]: 5178/8083 cut-off events. [2024-06-27 21:30:22,259 INFO L125 PetriNetUnfolderBase]: For 662710/662718 co-relation queries the response was YES. [2024-06-27 21:30:22,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70146 conditions, 8083 events. 5178/8083 cut-off events. For 662710/662718 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 49697 event pairs, 1183 based on Foata normal form. 12/8094 useless extension candidates. Maximal degree in co-relation 69945. Up to 7665 conditions per place. [2024-06-27 21:30:22,403 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 505 selfloop transitions, 118 changer transitions 0/626 dead transitions. [2024-06-27 21:30:22,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 626 transitions, 12724 flow [2024-06-27 21:30:22,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:30:22,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:30:22,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 21:30:22,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-06-27 21:30:22,404 INFO L175 Difference]: Start difference. First operand has 430 places, 599 transitions, 11200 flow. Second operand 8 states and 134 transitions. [2024-06-27 21:30:22,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 626 transitions, 12724 flow [2024-06-27 21:30:25,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 626 transitions, 12536 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-27 21:30:25,784 INFO L231 Difference]: Finished difference. Result has 434 places, 599 transitions, 11264 flow [2024-06-27 21:30:25,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11014, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11264, PETRI_PLACES=434, PETRI_TRANSITIONS=599} [2024-06-27 21:30:25,785 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 393 predicate places. [2024-06-27 21:30:25,787 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 599 transitions, 11264 flow [2024-06-27 21:30:25,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:25,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:25,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:25,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 21:30:25,787 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:25,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:25,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1034481215, now seen corresponding path program 13 times [2024-06-27 21:30:25,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:25,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501429860] [2024-06-27 21:30:25,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:25,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:25,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:26,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:26,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:26,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501429860] [2024-06-27 21:30:26,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501429860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:26,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:26,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:30:26,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004742790] [2024-06-27 21:30:26,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:26,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:30:26,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:26,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:30:26,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:30:26,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:30:26,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 599 transitions, 11264 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:26,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:26,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:30:26,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:29,175 INFO L124 PetriNetUnfolderBase]: 5219/8157 cut-off events. [2024-06-27 21:30:29,175 INFO L125 PetriNetUnfolderBase]: For 685353/685363 co-relation queries the response was YES. [2024-06-27 21:30:29,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70469 conditions, 8157 events. 5219/8157 cut-off events. For 685353/685363 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 50306 event pairs, 1115 based on Foata normal form. 22/8175 useless extension candidates. Maximal degree in co-relation 70268. Up to 6954 conditions per place. [2024-06-27 21:30:29,314 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 491 selfloop transitions, 148 changer transitions 0/642 dead transitions. [2024-06-27 21:30:29,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 642 transitions, 12792 flow [2024-06-27 21:30:29,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:30:29,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:30:29,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-27 21:30:29,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325 [2024-06-27 21:30:29,315 INFO L175 Difference]: Start difference. First operand has 434 places, 599 transitions, 11264 flow. Second operand 10 states and 173 transitions. [2024-06-27 21:30:29,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 642 transitions, 12792 flow [2024-06-27 21:30:32,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 642 transitions, 12504 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 21:30:32,435 INFO L231 Difference]: Finished difference. Result has 436 places, 600 transitions, 11314 flow [2024-06-27 21:30:32,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10976, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11314, PETRI_PLACES=436, PETRI_TRANSITIONS=600} [2024-06-27 21:30:32,436 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 395 predicate places. [2024-06-27 21:30:32,436 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 600 transitions, 11314 flow [2024-06-27 21:30:32,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:32,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:32,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:32,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 21:30:32,437 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:32,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:32,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1205183645, now seen corresponding path program 14 times [2024-06-27 21:30:32,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:32,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815046044] [2024-06-27 21:30:32,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:32,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:32,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:33,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:33,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:33,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815046044] [2024-06-27 21:30:33,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815046044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:33,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:33,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:30:33,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378419355] [2024-06-27 21:30:33,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:33,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:30:33,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:33,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:30:33,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:30:33,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:30:33,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 600 transitions, 11314 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:33,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:33,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:30:33,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:35,779 INFO L124 PetriNetUnfolderBase]: 5199/8125 cut-off events. [2024-06-27 21:30:35,779 INFO L125 PetriNetUnfolderBase]: For 657954/657964 co-relation queries the response was YES. [2024-06-27 21:30:35,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69652 conditions, 8125 events. 5199/8125 cut-off events. For 657954/657964 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 50033 event pairs, 1096 based on Foata normal form. 22/8143 useless extension candidates. Maximal degree in co-relation 69452. Up to 7042 conditions per place. [2024-06-27 21:30:35,922 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 482 selfloop transitions, 153 changer transitions 0/638 dead transitions. [2024-06-27 21:30:35,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 638 transitions, 12756 flow [2024-06-27 21:30:35,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:30:35,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:30:35,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-27 21:30:35,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42 [2024-06-27 21:30:35,924 INFO L175 Difference]: Start difference. First operand has 436 places, 600 transitions, 11314 flow. Second operand 10 states and 168 transitions. [2024-06-27 21:30:35,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 638 transitions, 12756 flow [2024-06-27 21:30:38,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 638 transitions, 12426 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-27 21:30:38,841 INFO L231 Difference]: Finished difference. Result has 438 places, 600 transitions, 11296 flow [2024-06-27 21:30:38,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10984, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11296, PETRI_PLACES=438, PETRI_TRANSITIONS=600} [2024-06-27 21:30:38,841 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 397 predicate places. [2024-06-27 21:30:38,842 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 600 transitions, 11296 flow [2024-06-27 21:30:38,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:38,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:38,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:38,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 21:30:38,842 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:38,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:38,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1205298965, now seen corresponding path program 15 times [2024-06-27 21:30:38,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:38,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945458173] [2024-06-27 21:30:38,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:38,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:38,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:39,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:39,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:39,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945458173] [2024-06-27 21:30:39,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945458173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:39,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:39,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:30:39,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85692478] [2024-06-27 21:30:39,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:39,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:30:39,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:39,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:30:39,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:30:40,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:30:40,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 600 transitions, 11296 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:40,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:40,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:30:40,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:42,211 INFO L124 PetriNetUnfolderBase]: 5179/8093 cut-off events. [2024-06-27 21:30:42,211 INFO L125 PetriNetUnfolderBase]: For 638287/638297 co-relation queries the response was YES. [2024-06-27 21:30:42,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68557 conditions, 8093 events. 5179/8093 cut-off events. For 638287/638297 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 49844 event pairs, 1065 based on Foata normal form. 22/8111 useless extension candidates. Maximal degree in co-relation 68356. Up to 6693 conditions per place. [2024-06-27 21:30:42,353 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 479 selfloop transitions, 160 changer transitions 0/642 dead transitions. [2024-06-27 21:30:42,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 642 transitions, 12786 flow [2024-06-27 21:30:42,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:30:42,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:30:42,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-27 21:30:42,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43 [2024-06-27 21:30:42,354 INFO L175 Difference]: Start difference. First operand has 438 places, 600 transitions, 11296 flow. Second operand 10 states and 172 transitions. [2024-06-27 21:30:42,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 642 transitions, 12786 flow [2024-06-27 21:30:45,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 642 transitions, 12458 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-27 21:30:45,854 INFO L231 Difference]: Finished difference. Result has 439 places, 600 transitions, 11294 flow [2024-06-27 21:30:45,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10968, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11294, PETRI_PLACES=439, PETRI_TRANSITIONS=600} [2024-06-27 21:30:45,855 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 398 predicate places. [2024-06-27 21:30:45,855 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 600 transitions, 11294 flow [2024-06-27 21:30:45,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:45,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:45,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:45,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 21:30:45,856 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:45,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:45,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1064808161, now seen corresponding path program 16 times [2024-06-27 21:30:45,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:45,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620243179] [2024-06-27 21:30:45,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:45,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:45,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:46,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:46,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:46,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620243179] [2024-06-27 21:30:46,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620243179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:46,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:46,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:30:46,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277706268] [2024-06-27 21:30:46,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:46,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:30:46,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:46,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:30:46,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:30:47,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:30:47,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 600 transitions, 11294 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:47,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:47,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:30:47,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:49,254 INFO L124 PetriNetUnfolderBase]: 5159/8061 cut-off events. [2024-06-27 21:30:49,255 INFO L125 PetriNetUnfolderBase]: For 618189/618199 co-relation queries the response was YES. [2024-06-27 21:30:49,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67674 conditions, 8061 events. 5159/8061 cut-off events. For 618189/618199 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 49635 event pairs, 1040 based on Foata normal form. 22/8079 useless extension candidates. Maximal degree in co-relation 67472. Up to 6858 conditions per place. [2024-06-27 21:30:49,397 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 473 selfloop transitions, 165 changer transitions 0/641 dead transitions. [2024-06-27 21:30:49,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 641 transitions, 12644 flow [2024-06-27 21:30:49,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:30:49,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:30:49,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-27 21:30:49,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-27 21:30:49,399 INFO L175 Difference]: Start difference. First operand has 439 places, 600 transitions, 11294 flow. Second operand 10 states and 170 transitions. [2024-06-27 21:30:49,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 641 transitions, 12644 flow [2024-06-27 21:30:52,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 641 transitions, 12032 flow, removed 25 selfloop flow, removed 11 redundant places. [2024-06-27 21:30:52,951 INFO L231 Difference]: Finished difference. Result has 437 places, 599 transitions, 10874 flow [2024-06-27 21:30:52,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10540, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10874, PETRI_PLACES=437, PETRI_TRANSITIONS=599} [2024-06-27 21:30:52,951 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 396 predicate places. [2024-06-27 21:30:52,952 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 599 transitions, 10874 flow [2024-06-27 21:30:52,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:52,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:52,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:52,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 21:30:52,952 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)] === [2024-06-27 21:30:52,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:52,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1890154915, now seen corresponding path program 6 times [2024-06-27 21:30:52,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:52,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925118786] [2024-06-27 21:30:52,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:52,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:52,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:53,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:53,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:53,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925118786] [2024-06-27 21:30:53,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925118786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:53,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:53,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:30:53,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539413611] [2024-06-27 21:30:53,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:53,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:30:53,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:53,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:30:53,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:30:53,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:30:53,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 599 transitions, 10874 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:53,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:53,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:30:53,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:55,648 INFO L124 PetriNetUnfolderBase]: 5179/8096 cut-off events. [2024-06-27 21:30:55,648 INFO L125 PetriNetUnfolderBase]: For 611955/611959 co-relation queries the response was YES. [2024-06-27 21:30:55,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66624 conditions, 8096 events. 5179/8096 cut-off events. For 611955/611959 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 50135 event pairs, 1490 based on Foata normal form. 8/8103 useless extension candidates. Maximal degree in co-relation 66424. Up to 7656 conditions per place. [2024-06-27 21:30:55,792 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 492 selfloop transitions, 132 changer transitions 0/627 dead transitions. [2024-06-27 21:30:55,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 627 transitions, 12434 flow [2024-06-27 21:30:55,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:30:55,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:30:55,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 21:30:55,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392857142857143 [2024-06-27 21:30:55,794 INFO L175 Difference]: Start difference. First operand has 437 places, 599 transitions, 10874 flow. Second operand 7 states and 123 transitions. [2024-06-27 21:30:55,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 627 transitions, 12434 flow [2024-06-27 21:30:59,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 627 transitions, 12086 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-27 21:30:59,480 INFO L231 Difference]: Finished difference. Result has 435 places, 602 transitions, 10879 flow [2024-06-27 21:30:59,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10526, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10879, PETRI_PLACES=435, PETRI_TRANSITIONS=602} [2024-06-27 21:30:59,480 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 394 predicate places. [2024-06-27 21:30:59,481 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 602 transitions, 10879 flow [2024-06-27 21:30:59,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:59,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:59,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:59,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 21:30:59,481 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)] === [2024-06-27 21:30:59,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:59,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1829795105, now seen corresponding path program 7 times [2024-06-27 21:30:59,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:59,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832920988] [2024-06-27 21:30:59,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:59,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:59,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:00,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:00,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:00,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832920988] [2024-06-27 21:31:00,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832920988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:00,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:00,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:31:00,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852364707] [2024-06-27 21:31:00,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:00,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:31:00,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:00,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:31:00,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:31:00,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:31:00,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 602 transitions, 10879 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:00,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:00,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:31:00,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:02,215 INFO L124 PetriNetUnfolderBase]: 5199/8114 cut-off events. [2024-06-27 21:31:02,216 INFO L125 PetriNetUnfolderBase]: For 620782/620790 co-relation queries the response was YES. [2024-06-27 21:31:02,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66617 conditions, 8114 events. 5199/8114 cut-off events. For 620782/620790 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 50049 event pairs, 1164 based on Foata normal form. 12/8125 useless extension candidates. Maximal degree in co-relation 66416. Up to 7672 conditions per place. [2024-06-27 21:31:02,344 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 493 selfloop transitions, 130 changer transitions 0/626 dead transitions. [2024-06-27 21:31:02,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 626 transitions, 12429 flow [2024-06-27 21:31:02,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:31:02,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:31:02,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-27 21:31:02,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-27 21:31:02,346 INFO L175 Difference]: Start difference. First operand has 435 places, 602 transitions, 10879 flow. Second operand 7 states and 118 transitions. [2024-06-27 21:31:02,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 626 transitions, 12429 flow [2024-06-27 21:31:05,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 626 transitions, 12177 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-27 21:31:05,591 INFO L231 Difference]: Finished difference. Result has 435 places, 605 transitions, 10963 flow [2024-06-27 21:31:05,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10634, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10963, PETRI_PLACES=435, PETRI_TRANSITIONS=605} [2024-06-27 21:31:05,592 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 394 predicate places. [2024-06-27 21:31:05,592 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 605 transitions, 10963 flow [2024-06-27 21:31:05,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:05,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:05,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:31:05,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 21:31:05,592 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)] === [2024-06-27 21:31:05,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:05,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1113525575, now seen corresponding path program 8 times [2024-06-27 21:31:05,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:05,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670085775] [2024-06-27 21:31:05,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:05,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:05,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:06,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:06,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:06,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670085775] [2024-06-27 21:31:06,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670085775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:06,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:06,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:31:06,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761122246] [2024-06-27 21:31:06,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:06,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:31:06,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:06,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:31:06,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:31:06,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:31:06,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 605 transitions, 10963 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:06,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:06,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:31:06,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:08,243 INFO L124 PetriNetUnfolderBase]: 5187/8108 cut-off events. [2024-06-27 21:31:08,244 INFO L125 PetriNetUnfolderBase]: For 598982/598986 co-relation queries the response was YES. [2024-06-27 21:31:08,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65998 conditions, 8108 events. 5187/8108 cut-off events. For 598982/598986 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 50228 event pairs, 1508 based on Foata normal form. 8/8115 useless extension candidates. Maximal degree in co-relation 65798. Up to 7832 conditions per place. [2024-06-27 21:31:08,382 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 517 selfloop transitions, 106 changer transitions 0/626 dead transitions. [2024-06-27 21:31:08,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 626 transitions, 12295 flow [2024-06-27 21:31:08,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:31:08,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:31:08,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-27 21:31:08,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45416666666666666 [2024-06-27 21:31:08,383 INFO L175 Difference]: Start difference. First operand has 435 places, 605 transitions, 10963 flow. Second operand 6 states and 109 transitions. [2024-06-27 21:31:08,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 626 transitions, 12295 flow [2024-06-27 21:31:12,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 626 transitions, 12069 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-27 21:31:12,358 INFO L231 Difference]: Finished difference. Result has 436 places, 605 transitions, 11032 flow [2024-06-27 21:31:12,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10737, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11032, PETRI_PLACES=436, PETRI_TRANSITIONS=605} [2024-06-27 21:31:12,359 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 395 predicate places. [2024-06-27 21:31:12,359 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 605 transitions, 11032 flow [2024-06-27 21:31:12,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:12,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:12,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:31:12,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 21:31:12,360 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)] === [2024-06-27 21:31:12,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:12,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1210618760, now seen corresponding path program 1 times [2024-06-27 21:31:12,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:12,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057327517] [2024-06-27 21:31:12,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:12,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:12,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:12,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:12,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:12,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057327517] [2024-06-27 21:31:12,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057327517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:12,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:12,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:31:12,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909675932] [2024-06-27 21:31:12,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:12,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:31:12,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:12,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:31:12,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:31:13,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:31:13,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 605 transitions, 11032 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:13,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:13,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:31:13,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:15,093 INFO L124 PetriNetUnfolderBase]: 5095/8025 cut-off events. [2024-06-27 21:31:15,093 INFO L125 PetriNetUnfolderBase]: For 641028/641054 co-relation queries the response was YES. [2024-06-27 21:31:15,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65956 conditions, 8025 events. 5095/8025 cut-off events. For 641028/641054 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 50434 event pairs, 1876 based on Foata normal form. 6/7998 useless extension candidates. Maximal degree in co-relation 65756. Up to 7627 conditions per place. [2024-06-27 21:31:15,225 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 524 selfloop transitions, 50 changer transitions 0/643 dead transitions. [2024-06-27 21:31:15,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 643 transitions, 12968 flow [2024-06-27 21:31:15,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:31:15,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:31:15,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 21:31:15,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428125 [2024-06-27 21:31:15,226 INFO L175 Difference]: Start difference. First operand has 436 places, 605 transitions, 11032 flow. Second operand 8 states and 137 transitions. [2024-06-27 21:31:15,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 643 transitions, 12968 flow [2024-06-27 21:31:18,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 643 transitions, 12654 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 21:31:18,225 INFO L231 Difference]: Finished difference. Result has 440 places, 617 transitions, 11079 flow [2024-06-27 21:31:18,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10718, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=562, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11079, PETRI_PLACES=440, PETRI_TRANSITIONS=617} [2024-06-27 21:31:18,225 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 399 predicate places. [2024-06-27 21:31:18,225 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 617 transitions, 11079 flow [2024-06-27 21:31:18,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:18,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:18,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:31:18,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 21:31:18,226 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)] === [2024-06-27 21:31:18,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:18,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1692143758, now seen corresponding path program 1 times [2024-06-27 21:31:18,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:18,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438468969] [2024-06-27 21:31:18,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:18,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:18,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:18,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:18,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:18,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438468969] [2024-06-27 21:31:18,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438468969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:18,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:18,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:31:18,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556812732] [2024-06-27 21:31:18,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:18,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:31:18,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:18,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:31:18,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:31:18,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:31:18,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 617 transitions, 11079 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:18,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:18,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:31:18,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:20,907 INFO L124 PetriNetUnfolderBase]: 5212/8137 cut-off events. [2024-06-27 21:31:20,907 INFO L125 PetriNetUnfolderBase]: For 608537/608541 co-relation queries the response was YES. [2024-06-27 21:31:21,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66967 conditions, 8137 events. 5212/8137 cut-off events. For 608537/608541 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 50386 event pairs, 1527 based on Foata normal form. 6/8142 useless extension candidates. Maximal degree in co-relation 66764. Up to 8038 conditions per place. [2024-06-27 21:31:21,032 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 604 selfloop transitions, 43 changer transitions 0/650 dead transitions. [2024-06-27 21:31:21,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 650 transitions, 12614 flow [2024-06-27 21:31:21,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:31:21,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:31:21,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-06-27 21:31:21,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-27 21:31:21,033 INFO L175 Difference]: Start difference. First operand has 440 places, 617 transitions, 11079 flow. Second operand 9 states and 135 transitions. [2024-06-27 21:31:21,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 650 transitions, 12614 flow [2024-06-27 21:31:24,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 650 transitions, 12541 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-27 21:31:24,849 INFO L231 Difference]: Finished difference. Result has 449 places, 630 transitions, 11320 flow [2024-06-27 21:31:24,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11006, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=575, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11320, PETRI_PLACES=449, PETRI_TRANSITIONS=630} [2024-06-27 21:31:24,850 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 408 predicate places. [2024-06-27 21:31:24,850 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 630 transitions, 11320 flow [2024-06-27 21:31:24,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:24,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:24,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:31:24,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 21:31:24,851 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)] === [2024-06-27 21:31:24,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:24,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1210708970, now seen corresponding path program 2 times [2024-06-27 21:31:24,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:24,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920090485] [2024-06-27 21:31:24,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:24,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:24,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:25,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:25,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:25,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920090485] [2024-06-27 21:31:25,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920090485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:25,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:25,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:31:25,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213380506] [2024-06-27 21:31:25,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:25,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:31:25,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:25,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:31:25,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:31:25,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:31:25,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 630 transitions, 11320 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:25,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:25,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:31:25,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:27,682 INFO L124 PetriNetUnfolderBase]: 5110/8048 cut-off events. [2024-06-27 21:31:27,683 INFO L125 PetriNetUnfolderBase]: For 668556/668602 co-relation queries the response was YES. [2024-06-27 21:31:27,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67718 conditions, 8048 events. 5110/8048 cut-off events. For 668556/668602 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 50614 event pairs, 1869 based on Foata normal form. 6/8020 useless extension candidates. Maximal degree in co-relation 67511. Up to 7701 conditions per place. [2024-06-27 21:31:27,809 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 547 selfloop transitions, 37 changer transitions 0/653 dead transitions. [2024-06-27 21:31:27,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 653 transitions, 12620 flow [2024-06-27 21:31:27,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:31:27,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:31:27,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-27 21:31:27,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.403125 [2024-06-27 21:31:27,810 INFO L175 Difference]: Start difference. First operand has 449 places, 630 transitions, 11320 flow. Second operand 8 states and 129 transitions. [2024-06-27 21:31:27,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 653 transitions, 12620 flow [2024-06-27 21:31:31,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 653 transitions, 12499 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-27 21:31:31,420 INFO L231 Difference]: Finished difference. Result has 452 places, 633 transitions, 11321 flow [2024-06-27 21:31:31,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11199, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=630, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=593, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11321, PETRI_PLACES=452, PETRI_TRANSITIONS=633} [2024-06-27 21:31:31,437 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 411 predicate places. [2024-06-27 21:31:31,437 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 633 transitions, 11321 flow [2024-06-27 21:31:31,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:31,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:31,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:31:31,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 21:31:31,437 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)] === [2024-06-27 21:31:31,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:31,438 INFO L85 PathProgramCache]: Analyzing trace with hash 213356946, now seen corresponding path program 2 times [2024-06-27 21:31:31,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:31,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234884971] [2024-06-27 21:31:31,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:31,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:31,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:32,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:32,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:32,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234884971] [2024-06-27 21:31:32,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234884971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:32,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:32,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:31:32,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340290404] [2024-06-27 21:31:32,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:32,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:31:32,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:32,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:31:32,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:31:32,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:31:32,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 633 transitions, 11321 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:32,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:32,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:31:32,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:34,331 INFO L124 PetriNetUnfolderBase]: 5263/8208 cut-off events. [2024-06-27 21:31:34,331 INFO L125 PetriNetUnfolderBase]: For 641965/641969 co-relation queries the response was YES. [2024-06-27 21:31:34,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68610 conditions, 8208 events. 5263/8208 cut-off events. For 641965/641969 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 50779 event pairs, 1530 based on Foata normal form. 6/8213 useless extension candidates. Maximal degree in co-relation 68402. Up to 8047 conditions per place. [2024-06-27 21:31:34,464 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 603 selfloop transitions, 60 changer transitions 0/666 dead transitions. [2024-06-27 21:31:34,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 666 transitions, 13118 flow [2024-06-27 21:31:34,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:31:34,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:31:34,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-27 21:31:34,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-06-27 21:31:34,465 INFO L175 Difference]: Start difference. First operand has 452 places, 633 transitions, 11321 flow. Second operand 8 states and 127 transitions. [2024-06-27 21:31:34,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 666 transitions, 13118 flow [2024-06-27 21:31:38,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 666 transitions, 13024 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 21:31:38,120 INFO L231 Difference]: Finished difference. Result has 455 places, 645 transitions, 11589 flow [2024-06-27 21:31:38,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11227, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11589, PETRI_PLACES=455, PETRI_TRANSITIONS=645} [2024-06-27 21:31:38,121 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 414 predicate places. [2024-06-27 21:31:38,121 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 645 transitions, 11589 flow [2024-06-27 21:31:38,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:38,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:38,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:31:38,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 21:31:38,121 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)] === [2024-06-27 21:31:38,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:38,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1214428040, now seen corresponding path program 3 times [2024-06-27 21:31:38,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:38,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546930080] [2024-06-27 21:31:38,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:38,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:38,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:38,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:38,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:38,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546930080] [2024-06-27 21:31:38,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546930080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:38,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:38,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:31:38,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139094295] [2024-06-27 21:31:38,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:38,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:31:38,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:38,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:31:38,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:31:38,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:31:38,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 645 transitions, 11589 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:38,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:38,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:31:38,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:41,248 INFO L124 PetriNetUnfolderBase]: 5153/8109 cut-off events. [2024-06-27 21:31:41,248 INFO L125 PetriNetUnfolderBase]: For 696595/696639 co-relation queries the response was YES. [2024-06-27 21:31:41,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68847 conditions, 8109 events. 5153/8109 cut-off events. For 696595/696639 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 50976 event pairs, 1871 based on Foata normal form. 4/8080 useless extension candidates. Maximal degree in co-relation 68637. Up to 7776 conditions per place. [2024-06-27 21:31:41,382 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 561 selfloop transitions, 34 changer transitions 0/666 dead transitions. [2024-06-27 21:31:41,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 666 transitions, 13071 flow [2024-06-27 21:31:41,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:31:41,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:31:41,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-27 21:31:41,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-06-27 21:31:41,383 INFO L175 Difference]: Start difference. First operand has 455 places, 645 transitions, 11589 flow. Second operand 8 states and 127 transitions. [2024-06-27 21:31:41,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 666 transitions, 13071 flow [2024-06-27 21:31:44,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 666 transitions, 12945 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-27 21:31:44,766 INFO L231 Difference]: Finished difference. Result has 460 places, 648 transitions, 11585 flow [2024-06-27 21:31:44,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11463, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=611, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11585, PETRI_PLACES=460, PETRI_TRANSITIONS=648} [2024-06-27 21:31:44,766 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 419 predicate places. [2024-06-27 21:31:44,766 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 648 transitions, 11585 flow [2024-06-27 21:31:44,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:44,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:44,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:31:44,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 21:31:44,767 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)] === [2024-06-27 21:31:44,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:44,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1444382860, now seen corresponding path program 1 times [2024-06-27 21:31:44,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:44,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203927842] [2024-06-27 21:31:44,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:44,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:44,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:45,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:45,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:45,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203927842] [2024-06-27 21:31:45,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203927842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:45,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:45,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:31:45,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715348035] [2024-06-27 21:31:45,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:45,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:31:45,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:45,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:31:45,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:31:45,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:31:45,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 648 transitions, 11585 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:45,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:45,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:31:45,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:47,798 INFO L124 PetriNetUnfolderBase]: 5275/8237 cut-off events. [2024-06-27 21:31:47,799 INFO L125 PetriNetUnfolderBase]: For 666245/666245 co-relation queries the response was YES. [2024-06-27 21:31:47,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69202 conditions, 8237 events. 5275/8237 cut-off events. For 666245/666245 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 51076 event pairs, 1932 based on Foata normal form. 1/8237 useless extension candidates. Maximal degree in co-relation 68990. Up to 8145 conditions per place. [2024-06-27 21:31:47,947 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 629 selfloop transitions, 27 changer transitions 0/659 dead transitions. [2024-06-27 21:31:47,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 659 transitions, 12947 flow [2024-06-27 21:31:47,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:31:47,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:31:47,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2024-06-27 21:31:47,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-27 21:31:47,948 INFO L175 Difference]: Start difference. First operand has 460 places, 648 transitions, 11585 flow. Second operand 5 states and 85 transitions. [2024-06-27 21:31:47,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 659 transitions, 12947 flow [2024-06-27 21:31:51,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 659 transitions, 12819 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 21:31:51,631 INFO L231 Difference]: Finished difference. Result has 459 places, 648 transitions, 11532 flow [2024-06-27 21:31:51,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11457, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=11532, PETRI_PLACES=459, PETRI_TRANSITIONS=648} [2024-06-27 21:31:51,631 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 418 predicate places. [2024-06-27 21:31:51,631 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 648 transitions, 11532 flow [2024-06-27 21:31:51,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:51,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:51,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:31:51,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 21:31:51,632 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)] === [2024-06-27 21:31:51,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:51,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1469536012, now seen corresponding path program 4 times [2024-06-27 21:31:51,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:51,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192951680] [2024-06-27 21:31:51,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:51,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:51,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:52,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:52,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:52,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192951680] [2024-06-27 21:31:52,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192951680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:52,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:52,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:31:52,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638134749] [2024-06-27 21:31:52,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:52,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:31:52,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:52,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:31:52,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:31:52,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:31:52,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 648 transitions, 11532 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:52,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:52,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:31:52,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:54,609 INFO L124 PetriNetUnfolderBase]: 5150/8106 cut-off events. [2024-06-27 21:31:54,609 INFO L125 PetriNetUnfolderBase]: For 711441/711465 co-relation queries the response was YES. [2024-06-27 21:31:54,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68659 conditions, 8106 events. 5150/8106 cut-off events. For 711441/711465 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 50972 event pairs, 1873 based on Foata normal form. 5/8078 useless extension candidates. Maximal degree in co-relation 68446. Up to 7752 conditions per place. [2024-06-27 21:31:54,743 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 561 selfloop transitions, 38 changer transitions 0/670 dead transitions. [2024-06-27 21:31:54,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 670 transitions, 13006 flow [2024-06-27 21:31:54,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:31:54,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:31:54,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 21:31:54,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-27 21:31:54,744 INFO L175 Difference]: Start difference. First operand has 459 places, 648 transitions, 11532 flow. Second operand 7 states and 122 transitions. [2024-06-27 21:31:54,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 670 transitions, 13006 flow [2024-06-27 21:31:58,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 670 transitions, 12936 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 21:31:58,927 INFO L231 Difference]: Finished difference. Result has 462 places, 648 transitions, 11549 flow [2024-06-27 21:31:58,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11462, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=610, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11549, PETRI_PLACES=462, PETRI_TRANSITIONS=648} [2024-06-27 21:31:58,927 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 421 predicate places. [2024-06-27 21:31:58,927 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 648 transitions, 11549 flow [2024-06-27 21:31:58,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:58,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:58,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:31:58,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 21:31:58,928 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)] === [2024-06-27 21:31:58,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:58,928 INFO L85 PathProgramCache]: Analyzing trace with hash -147735180, now seen corresponding path program 1 times [2024-06-27 21:31:58,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:58,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112535617] [2024-06-27 21:31:58,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:58,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:58,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:59,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:59,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:59,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112535617] [2024-06-27 21:31:59,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112535617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:59,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:59,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:31:59,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705813222] [2024-06-27 21:31:59,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:59,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:31:59,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:59,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:31:59,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:31:59,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:31:59,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 648 transitions, 11549 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:59,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:59,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:31:59,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:02,168 INFO L124 PetriNetUnfolderBase]: 5320/8293 cut-off events. [2024-06-27 21:32:02,168 INFO L125 PetriNetUnfolderBase]: For 726006/726014 co-relation queries the response was YES. [2024-06-27 21:32:02,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69627 conditions, 8293 events. 5320/8293 cut-off events. For 726006/726014 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 51194 event pairs, 1153 based on Foata normal form. 22/8314 useless extension candidates. Maximal degree in co-relation 69413. Up to 7780 conditions per place. [2024-06-27 21:32:02,315 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 539 selfloop transitions, 137 changer transitions 0/679 dead transitions. [2024-06-27 21:32:02,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 679 transitions, 13101 flow [2024-06-27 21:32:02,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:32:02,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:32:02,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-27 21:32:02,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 21:32:02,316 INFO L175 Difference]: Start difference. First operand has 462 places, 648 transitions, 11549 flow. Second operand 9 states and 150 transitions. [2024-06-27 21:32:02,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 679 transitions, 13101 flow [2024-06-27 21:32:06,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 679 transitions, 12998 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 21:32:06,040 INFO L231 Difference]: Finished difference. Result has 465 places, 649 transitions, 11748 flow [2024-06-27 21:32:06,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11446, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11748, PETRI_PLACES=465, PETRI_TRANSITIONS=649} [2024-06-27 21:32:06,041 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 424 predicate places. [2024-06-27 21:32:06,041 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 649 transitions, 11748 flow [2024-06-27 21:32:06,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:06,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:06,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:06,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 21:32:06,042 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)] === [2024-06-27 21:32:06,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:06,042 INFO L85 PathProgramCache]: Analyzing trace with hash 773151072, now seen corresponding path program 1 times [2024-06-27 21:32:06,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:06,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593595131] [2024-06-27 21:32:06,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:06,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:06,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:06,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:06,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:06,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593595131] [2024-06-27 21:32:06,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593595131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:06,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:06,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:32:06,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619980837] [2024-06-27 21:32:06,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:06,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:32:06,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:06,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:32:06,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:32:06,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:32:06,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 649 transitions, 11748 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:06,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:06,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:32:06,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:08,938 INFO L124 PetriNetUnfolderBase]: 5333/8314 cut-off events. [2024-06-27 21:32:08,939 INFO L125 PetriNetUnfolderBase]: For 700645/700649 co-relation queries the response was YES. [2024-06-27 21:32:09,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70496 conditions, 8314 events. 5333/8314 cut-off events. For 700645/700649 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 51538 event pairs, 1543 based on Foata normal form. 5/8318 useless extension candidates. Maximal degree in co-relation 70281. Up to 8200 conditions per place. [2024-06-27 21:32:09,087 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 632 selfloop transitions, 46 changer transitions 0/681 dead transitions. [2024-06-27 21:32:09,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 681 transitions, 13592 flow [2024-06-27 21:32:09,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:32:09,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:32:09,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-27 21:32:09,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39444444444444443 [2024-06-27 21:32:09,089 INFO L175 Difference]: Start difference. First operand has 465 places, 649 transitions, 11748 flow. Second operand 9 states and 142 transitions. [2024-06-27 21:32:09,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 681 transitions, 13592 flow [2024-06-27 21:32:12,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 681 transitions, 13322 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 21:32:12,697 INFO L231 Difference]: Finished difference. Result has 467 places, 655 transitions, 11794 flow [2024-06-27 21:32:12,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11478, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11794, PETRI_PLACES=467, PETRI_TRANSITIONS=655} [2024-06-27 21:32:12,698 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 426 predicate places. [2024-06-27 21:32:12,698 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 655 transitions, 11794 flow [2024-06-27 21:32:12,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:12,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:12,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:12,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 21:32:12,699 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)] === [2024-06-27 21:32:12,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:12,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1628740182, now seen corresponding path program 2 times [2024-06-27 21:32:12,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:12,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389000215] [2024-06-27 21:32:12,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:12,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:12,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:13,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:13,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:13,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389000215] [2024-06-27 21:32:13,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389000215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:13,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:13,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:32:13,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812244467] [2024-06-27 21:32:13,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:13,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:32:13,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:13,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:32:13,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:32:13,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:32:13,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 655 transitions, 11794 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:13,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:13,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:32:13,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:15,618 INFO L124 PetriNetUnfolderBase]: 5338/8321 cut-off events. [2024-06-27 21:32:15,619 INFO L125 PetriNetUnfolderBase]: For 714969/714973 co-relation queries the response was YES. [2024-06-27 21:32:15,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70671 conditions, 8321 events. 5338/8321 cut-off events. For 714969/714973 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 51573 event pairs, 1541 based on Foata normal form. 5/8325 useless extension candidates. Maximal degree in co-relation 70455. Up to 8222 conditions per place. [2024-06-27 21:32:15,760 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 636 selfloop transitions, 41 changer transitions 0/680 dead transitions. [2024-06-27 21:32:15,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 680 transitions, 13342 flow [2024-06-27 21:32:15,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:32:15,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:32:15,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-27 21:32:15,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38055555555555554 [2024-06-27 21:32:15,761 INFO L175 Difference]: Start difference. First operand has 467 places, 655 transitions, 11794 flow. Second operand 9 states and 137 transitions. [2024-06-27 21:32:15,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 680 transitions, 13342 flow [2024-06-27 21:32:19,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 680 transitions, 13095 flow, removed 70 selfloop flow, removed 4 redundant places. [2024-06-27 21:32:19,484 INFO L231 Difference]: Finished difference. Result has 472 places, 658 transitions, 11753 flow [2024-06-27 21:32:19,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11567, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11753, PETRI_PLACES=472, PETRI_TRANSITIONS=658} [2024-06-27 21:32:19,485 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 431 predicate places. [2024-06-27 21:32:19,485 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 658 transitions, 11753 flow [2024-06-27 21:32:19,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:19,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:19,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:19,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 21:32:19,486 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)] === [2024-06-27 21:32:19,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:19,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1684756582, now seen corresponding path program 3 times [2024-06-27 21:32:19,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:19,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431324705] [2024-06-27 21:32:19,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:19,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:19,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:19,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:19,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:19,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431324705] [2024-06-27 21:32:19,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431324705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:19,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:19,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:32:19,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095296085] [2024-06-27 21:32:19,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:19,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:32:19,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:19,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:32:19,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:32:20,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:32:20,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 658 transitions, 11753 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:20,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:20,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:32:20,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:22,353 INFO L124 PetriNetUnfolderBase]: 5335/8317 cut-off events. [2024-06-27 21:32:22,354 INFO L125 PetriNetUnfolderBase]: For 722592/722596 co-relation queries the response was YES. [2024-06-27 21:32:22,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70573 conditions, 8317 events. 5335/8317 cut-off events. For 722592/722596 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 51574 event pairs, 1541 based on Foata normal form. 5/8321 useless extension candidates. Maximal degree in co-relation 70355. Up to 8233 conditions per place. [2024-06-27 21:32:22,493 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 638 selfloop transitions, 36 changer transitions 0/677 dead transitions. [2024-06-27 21:32:22,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 677 transitions, 13167 flow [2024-06-27 21:32:22,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:32:22,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:32:22,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 132 transitions. [2024-06-27 21:32:22,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-27 21:32:22,494 INFO L175 Difference]: Start difference. First operand has 472 places, 658 transitions, 11753 flow. Second operand 9 states and 132 transitions. [2024-06-27 21:32:22,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 677 transitions, 13167 flow [2024-06-27 21:32:26,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 677 transitions, 12947 flow, removed 72 selfloop flow, removed 6 redundant places. [2024-06-27 21:32:26,383 INFO L231 Difference]: Finished difference. Result has 475 places, 658 transitions, 11611 flow [2024-06-27 21:32:26,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11533, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=622, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11611, PETRI_PLACES=475, PETRI_TRANSITIONS=658} [2024-06-27 21:32:26,383 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 434 predicate places. [2024-06-27 21:32:26,383 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 658 transitions, 11611 flow [2024-06-27 21:32:26,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:26,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:26,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:26,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 21:32:26,384 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)] === [2024-06-27 21:32:26,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:26,384 INFO L85 PathProgramCache]: Analyzing trace with hash 950402748, now seen corresponding path program 3 times [2024-06-27 21:32:26,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:26,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6411956] [2024-06-27 21:32:26,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:26,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:26,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:26,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:26,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:26,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6411956] [2024-06-27 21:32:26,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6411956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:26,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:26,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:32:26,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396172618] [2024-06-27 21:32:26,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:26,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:32:26,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:26,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:32:26,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:32:26,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:32:26,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 658 transitions, 11611 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:26,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:26,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:32:26,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:29,258 INFO L124 PetriNetUnfolderBase]: 5345/8331 cut-off events. [2024-06-27 21:32:29,258 INFO L125 PetriNetUnfolderBase]: For 735275/735279 co-relation queries the response was YES. [2024-06-27 21:32:29,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70725 conditions, 8331 events. 5345/8331 cut-off events. For 735275/735279 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 51568 event pairs, 1542 based on Foata normal form. 6/8336 useless extension candidates. Maximal degree in co-relation 70506. Up to 8221 conditions per place. [2024-06-27 21:32:29,415 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 632 selfloop transitions, 47 changer transitions 0/682 dead transitions. [2024-06-27 21:32:29,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 682 transitions, 13117 flow [2024-06-27 21:32:29,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:32:29,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:32:29,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-27 21:32:29,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-27 21:32:29,417 INFO L175 Difference]: Start difference. First operand has 475 places, 658 transitions, 11611 flow. Second operand 9 states and 138 transitions. [2024-06-27 21:32:29,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 682 transitions, 13117 flow [2024-06-27 21:32:33,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 682 transitions, 13013 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-27 21:32:33,667 INFO L231 Difference]: Finished difference. Result has 476 places, 661 transitions, 11679 flow [2024-06-27 21:32:33,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11507, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=611, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11679, PETRI_PLACES=476, PETRI_TRANSITIONS=661} [2024-06-27 21:32:33,668 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 435 predicate places. [2024-06-27 21:32:33,668 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 661 transitions, 11679 flow [2024-06-27 21:32:33,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:33,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:33,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:33,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 21:32:33,668 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)] === [2024-06-27 21:32:33,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:33,669 INFO L85 PathProgramCache]: Analyzing trace with hash 125976280, now seen corresponding path program 4 times [2024-06-27 21:32:33,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:33,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803656212] [2024-06-27 21:32:33,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:33,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:33,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:34,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:34,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:34,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803656212] [2024-06-27 21:32:34,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803656212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:34,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:34,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:32:34,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206896440] [2024-06-27 21:32:34,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:34,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:32:34,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:34,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:32:34,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:32:34,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:32:34,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 661 transitions, 11679 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:34,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:34,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:32:34,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:36,568 INFO L124 PetriNetUnfolderBase]: 5358/8349 cut-off events. [2024-06-27 21:32:36,569 INFO L125 PetriNetUnfolderBase]: For 751513/751517 co-relation queries the response was YES. [2024-06-27 21:32:36,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71285 conditions, 8349 events. 5358/8349 cut-off events. For 751513/751517 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 51643 event pairs, 1547 based on Foata normal form. 5/8353 useless extension candidates. Maximal degree in co-relation 71066. Up to 8200 conditions per place. [2024-06-27 21:32:36,717 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 622 selfloop transitions, 64 changer transitions 0/689 dead transitions. [2024-06-27 21:32:36,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 689 transitions, 13547 flow [2024-06-27 21:32:36,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:32:36,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:32:36,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-27 21:32:36,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39375 [2024-06-27 21:32:36,719 INFO L175 Difference]: Start difference. First operand has 476 places, 661 transitions, 11679 flow. Second operand 8 states and 126 transitions. [2024-06-27 21:32:36,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 689 transitions, 13547 flow [2024-06-27 21:32:41,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 689 transitions, 13403 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-27 21:32:41,378 INFO L231 Difference]: Finished difference. Result has 477 places, 667 transitions, 11903 flow [2024-06-27 21:32:41,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11535, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=600, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11903, PETRI_PLACES=477, PETRI_TRANSITIONS=667} [2024-06-27 21:32:41,378 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 436 predicate places. [2024-06-27 21:32:41,378 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 667 transitions, 11903 flow [2024-06-27 21:32:41,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:41,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:41,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:41,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 21:32:41,379 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)] === [2024-06-27 21:32:41,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:41,379 INFO L85 PathProgramCache]: Analyzing trace with hash 213356760, now seen corresponding path program 5 times [2024-06-27 21:32:41,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:41,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835000995] [2024-06-27 21:32:41,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:41,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:41,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:41,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:41,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:41,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835000995] [2024-06-27 21:32:41,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835000995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:41,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:41,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:32:41,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638289029] [2024-06-27 21:32:41,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:41,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:32:41,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:41,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:32:41,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:32:42,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:32:42,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 667 transitions, 11903 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:42,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:42,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:32:42,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:44,352 INFO L124 PetriNetUnfolderBase]: 5363/8356 cut-off events. [2024-06-27 21:32:44,352 INFO L125 PetriNetUnfolderBase]: For 768644/768648 co-relation queries the response was YES. [2024-06-27 21:32:44,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71770 conditions, 8356 events. 5363/8356 cut-off events. For 768644/768648 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 51755 event pairs, 1543 based on Foata normal form. 5/8360 useless extension candidates. Maximal degree in co-relation 71550. Up to 8237 conditions per place. [2024-06-27 21:32:44,500 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 634 selfloop transitions, 51 changer transitions 0/688 dead transitions. [2024-06-27 21:32:44,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 688 transitions, 13461 flow [2024-06-27 21:32:44,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:32:44,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:32:44,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-27 21:32:44,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.378125 [2024-06-27 21:32:44,502 INFO L175 Difference]: Start difference. First operand has 477 places, 667 transitions, 11903 flow. Second operand 8 states and 121 transitions. [2024-06-27 21:32:44,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 688 transitions, 13461 flow [2024-06-27 21:32:48,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 688 transitions, 13255 flow, removed 74 selfloop flow, removed 5 redundant places. [2024-06-27 21:32:48,819 INFO L231 Difference]: Finished difference. Result has 480 places, 670 transitions, 11933 flow [2024-06-27 21:32:48,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11717, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=616, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11933, PETRI_PLACES=480, PETRI_TRANSITIONS=670} [2024-06-27 21:32:48,820 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 439 predicate places. [2024-06-27 21:32:48,820 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 670 transitions, 11933 flow [2024-06-27 21:32:48,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:48,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:48,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:48,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 21:32:48,821 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:32:48,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:48,821 INFO L85 PathProgramCache]: Analyzing trace with hash 217998390, now seen corresponding path program 6 times [2024-06-27 21:32:48,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:48,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149589379] [2024-06-27 21:32:48,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:48,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:48,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:49,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:49,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:49,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149589379] [2024-06-27 21:32:49,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149589379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:49,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:49,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:32:49,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093807701] [2024-06-27 21:32:49,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:49,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:32:49,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:49,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:32:49,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:32:49,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:32:49,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 670 transitions, 11933 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:49,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:49,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:32:49,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:51,829 INFO L124 PetriNetUnfolderBase]: 5373/8370 cut-off events. [2024-06-27 21:32:51,830 INFO L125 PetriNetUnfolderBase]: For 764632/764636 co-relation queries the response was YES. [2024-06-27 21:32:51,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71673 conditions, 8370 events. 5373/8370 cut-off events. For 764632/764636 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 51805 event pairs, 1541 based on Foata normal form. 5/8374 useless extension candidates. Maximal degree in co-relation 71452. Up to 8280 conditions per place. [2024-06-27 21:32:52,027 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 647 selfloop transitions, 41 changer transitions 0/691 dead transitions. [2024-06-27 21:32:52,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 691 transitions, 13517 flow [2024-06-27 21:32:52,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:32:52,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:32:52,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 117 transitions. [2024-06-27 21:32:52,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.365625 [2024-06-27 21:32:52,029 INFO L175 Difference]: Start difference. First operand has 480 places, 670 transitions, 11933 flow. Second operand 8 states and 117 transitions. [2024-06-27 21:32:52,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 691 transitions, 13517 flow [2024-06-27 21:32:56,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 691 transitions, 13315 flow, removed 43 selfloop flow, removed 8 redundant places. [2024-06-27 21:32:56,235 INFO L231 Difference]: Finished difference. Result has 481 places, 676 transitions, 11998 flow [2024-06-27 21:32:56,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11739, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=629, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11998, PETRI_PLACES=481, PETRI_TRANSITIONS=676} [2024-06-27 21:32:56,235 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 440 predicate places. [2024-06-27 21:32:56,236 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 676 transitions, 11998 flow [2024-06-27 21:32:56,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:56,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:56,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:56,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 21:32:56,236 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)] === [2024-06-27 21:32:56,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:56,236 INFO L85 PathProgramCache]: Analyzing trace with hash 64882080, now seen corresponding path program 4 times [2024-06-27 21:32:56,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:56,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472508309] [2024-06-27 21:32:56,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:56,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:56,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:56,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:56,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:56,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472508309] [2024-06-27 21:32:56,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472508309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:56,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:56,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:32:56,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111821494] [2024-06-27 21:32:56,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:56,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:32:56,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:56,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:32:56,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:32:56,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:32:56,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 676 transitions, 11998 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:56,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:56,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:32:56,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:59,224 INFO L124 PetriNetUnfolderBase]: 5383/8384 cut-off events. [2024-06-27 21:32:59,224 INFO L125 PetriNetUnfolderBase]: For 769155/769159 co-relation queries the response was YES. [2024-06-27 21:32:59,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71734 conditions, 8384 events. 5383/8384 cut-off events. For 769155/769159 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 51921 event pairs, 1540 based on Foata normal form. 6/8389 useless extension candidates. Maximal degree in co-relation 71513. Up to 8279 conditions per place. [2024-06-27 21:32:59,388 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 646 selfloop transitions, 47 changer transitions 0/696 dead transitions. [2024-06-27 21:32:59,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 696 transitions, 13523 flow [2024-06-27 21:32:59,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:32:59,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:32:59,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-27 21:32:59,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-27 21:32:59,389 INFO L175 Difference]: Start difference. First operand has 481 places, 676 transitions, 11998 flow. Second operand 8 states and 120 transitions. [2024-06-27 21:32:59,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 696 transitions, 13523 flow [2024-06-27 21:33:03,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 696 transitions, 13364 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-27 21:33:03,884 INFO L231 Difference]: Finished difference. Result has 483 places, 680 transitions, 12026 flow [2024-06-27 21:33:03,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11839, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=630, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12026, PETRI_PLACES=483, PETRI_TRANSITIONS=680} [2024-06-27 21:33:03,885 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 442 predicate places. [2024-06-27 21:33:03,885 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 680 transitions, 12026 flow [2024-06-27 21:33:03,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:03,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:03,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:03,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 21:33:03,886 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)] === [2024-06-27 21:33:03,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:03,886 INFO L85 PathProgramCache]: Analyzing trace with hash 217998576, now seen corresponding path program 5 times [2024-06-27 21:33:03,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:03,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706028517] [2024-06-27 21:33:03,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:03,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:03,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:04,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:04,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:04,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706028517] [2024-06-27 21:33:04,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706028517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:04,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:04,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:33:04,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459955124] [2024-06-27 21:33:04,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:04,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:33:04,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:04,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:33:04,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:33:04,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:33:04,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 680 transitions, 12026 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:04,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:04,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:33:04,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:06,922 INFO L124 PetriNetUnfolderBase]: 5393/8398 cut-off events. [2024-06-27 21:33:06,923 INFO L125 PetriNetUnfolderBase]: For 770051/770055 co-relation queries the response was YES. [2024-06-27 21:33:07,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71860 conditions, 8398 events. 5393/8398 cut-off events. For 770051/770055 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 52011 event pairs, 1544 based on Foata normal form. 6/8403 useless extension candidates. Maximal degree in co-relation 71640. Up to 8273 conditions per place. [2024-06-27 21:33:07,127 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 641 selfloop transitions, 56 changer transitions 0/700 dead transitions. [2024-06-27 21:33:07,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 700 transitions, 13568 flow [2024-06-27 21:33:07,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:33:07,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:33:07,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-27 21:33:07,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.384375 [2024-06-27 21:33:07,128 INFO L175 Difference]: Start difference. First operand has 483 places, 680 transitions, 12026 flow. Second operand 8 states and 123 transitions. [2024-06-27 21:33:07,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 700 transitions, 13568 flow [2024-06-27 21:33:11,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 700 transitions, 13457 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-27 21:33:11,847 INFO L231 Difference]: Finished difference. Result has 487 places, 683 transitions, 12121 flow [2024-06-27 21:33:11,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11915, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=624, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12121, PETRI_PLACES=487, PETRI_TRANSITIONS=683} [2024-06-27 21:33:11,848 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 446 predicate places. [2024-06-27 21:33:11,848 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 683 transitions, 12121 flow [2024-06-27 21:33:11,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:11,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:11,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:11,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 21:33:11,849 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)] === [2024-06-27 21:33:11,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:11,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1209971240, now seen corresponding path program 1 times [2024-06-27 21:33:11,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:11,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523627345] [2024-06-27 21:33:11,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:11,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:11,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:12,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:12,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:12,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523627345] [2024-06-27 21:33:12,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523627345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:12,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:12,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:33:12,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447971038] [2024-06-27 21:33:12,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:12,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:33:12,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:12,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:33:12,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:33:12,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:33:12,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 683 transitions, 12121 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:12,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:12,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:33:12,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:15,254 INFO L124 PetriNetUnfolderBase]: 5401/8410 cut-off events. [2024-06-27 21:33:15,254 INFO L125 PetriNetUnfolderBase]: For 784771/784775 co-relation queries the response was YES. [2024-06-27 21:33:15,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72108 conditions, 8410 events. 5401/8410 cut-off events. For 784771/784775 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 52053 event pairs, 1545 based on Foata normal form. 6/8415 useless extension candidates. Maximal degree in co-relation 71887. Up to 8288 conditions per place. [2024-06-27 21:33:15,413 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 644 selfloop transitions, 55 changer transitions 0/702 dead transitions. [2024-06-27 21:33:15,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 702 transitions, 13637 flow [2024-06-27 21:33:15,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:33:15,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:33:15,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-27 21:33:15,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38125 [2024-06-27 21:33:15,414 INFO L175 Difference]: Start difference. First operand has 487 places, 683 transitions, 12121 flow. Second operand 8 states and 122 transitions. [2024-06-27 21:33:15,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 702 transitions, 13637 flow [2024-06-27 21:33:20,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 702 transitions, 13465 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-27 21:33:20,600 INFO L231 Difference]: Finished difference. Result has 489 places, 686 transitions, 12134 flow [2024-06-27 21:33:20,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11949, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=683, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=628, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12134, PETRI_PLACES=489, PETRI_TRANSITIONS=686} [2024-06-27 21:33:20,601 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 448 predicate places. [2024-06-27 21:33:20,601 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 686 transitions, 12134 flow [2024-06-27 21:33:20,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:20,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:20,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:20,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 21:33:20,602 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)] === [2024-06-27 21:33:20,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:20,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1362064330, now seen corresponding path program 7 times [2024-06-27 21:33:20,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:20,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222430883] [2024-06-27 21:33:20,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:20,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:20,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:21,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:21,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:21,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222430883] [2024-06-27 21:33:21,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222430883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:21,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:21,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:33:21,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459236303] [2024-06-27 21:33:21,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:21,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:33:21,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:21,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:33:21,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:33:21,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:33:21,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 686 transitions, 12134 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:21,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:21,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:33:21,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:23,631 INFO L124 PetriNetUnfolderBase]: 5414/8432 cut-off events. [2024-06-27 21:33:23,631 INFO L125 PetriNetUnfolderBase]: For 789516/789524 co-relation queries the response was YES. [2024-06-27 21:33:23,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72540 conditions, 8432 events. 5414/8432 cut-off events. For 789516/789524 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 52248 event pairs, 1546 based on Foata normal form. 9/8439 useless extension candidates. Maximal degree in co-relation 72318. Up to 8190 conditions per place. [2024-06-27 21:33:23,803 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 628 selfloop transitions, 93 changer transitions 0/724 dead transitions. [2024-06-27 21:33:23,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 724 transitions, 14653 flow [2024-06-27 21:33:23,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:33:23,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:33:23,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-27 21:33:23,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.403125 [2024-06-27 21:33:23,804 INFO L175 Difference]: Start difference. First operand has 489 places, 686 transitions, 12134 flow. Second operand 8 states and 129 transitions. [2024-06-27 21:33:23,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 724 transitions, 14653 flow [2024-06-27 21:33:28,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 724 transitions, 14496 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 21:33:28,959 INFO L231 Difference]: Finished difference. Result has 492 places, 702 transitions, 12673 flow [2024-06-27 21:33:28,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11977, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=600, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12673, PETRI_PLACES=492, PETRI_TRANSITIONS=702} [2024-06-27 21:33:28,959 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 451 predicate places. [2024-06-27 21:33:28,960 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 702 transitions, 12673 flow [2024-06-27 21:33:28,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:28,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:28,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:28,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-27 21:33:28,960 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)] === [2024-06-27 21:33:28,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:28,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1361944174, now seen corresponding path program 6 times [2024-06-27 21:33:28,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:28,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551331335] [2024-06-27 21:33:28,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:28,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:28,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:29,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:29,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:29,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551331335] [2024-06-27 21:33:29,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551331335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:29,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:29,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:33:29,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361925915] [2024-06-27 21:33:29,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:29,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:33:29,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:29,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:33:29,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:33:29,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:33:29,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 702 transitions, 12673 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:29,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:29,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:33:29,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:31,932 INFO L124 PetriNetUnfolderBase]: 5437/8464 cut-off events. [2024-06-27 21:33:31,933 INFO L125 PetriNetUnfolderBase]: For 817071/817079 co-relation queries the response was YES. [2024-06-27 21:33:32,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73497 conditions, 8464 events. 5437/8464 cut-off events. For 817071/817079 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 52458 event pairs, 1545 based on Foata normal form. 10/8472 useless extension candidates. Maximal degree in co-relation 73273. Up to 8215 conditions per place. [2024-06-27 21:33:32,094 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 639 selfloop transitions, 90 changer transitions 0/732 dead transitions. [2024-06-27 21:33:32,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 732 transitions, 14798 flow [2024-06-27 21:33:32,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:33:32,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:33:32,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-27 21:33:32,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 21:33:32,095 INFO L175 Difference]: Start difference. First operand has 492 places, 702 transitions, 12673 flow. Second operand 8 states and 128 transitions. [2024-06-27 21:33:32,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 732 transitions, 14798 flow [2024-06-27 21:33:37,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 732 transitions, 14593 flow, removed 90 selfloop flow, removed 2 redundant places. [2024-06-27 21:33:37,753 INFO L231 Difference]: Finished difference. Result has 499 places, 711 transitions, 12861 flow [2024-06-27 21:33:37,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12472, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=617, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12861, PETRI_PLACES=499, PETRI_TRANSITIONS=711} [2024-06-27 21:33:37,754 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 458 predicate places. [2024-06-27 21:33:37,754 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 711 transitions, 12861 flow [2024-06-27 21:33:37,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:37,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:37,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:37,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-27 21:33:37,754 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)] === [2024-06-27 21:33:37,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:37,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1361944360, now seen corresponding path program 8 times [2024-06-27 21:33:37,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:37,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998020770] [2024-06-27 21:33:37,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:37,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:37,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:38,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:38,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:38,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998020770] [2024-06-27 21:33:38,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998020770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:38,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:38,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:33:38,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788380513] [2024-06-27 21:33:38,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:38,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:33:38,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:38,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:33:38,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:33:38,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:33:38,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 711 transitions, 12861 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:38,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:38,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:33:38,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:40,804 INFO L124 PetriNetUnfolderBase]: 5442/8471 cut-off events. [2024-06-27 21:33:40,804 INFO L125 PetriNetUnfolderBase]: For 824357/824365 co-relation queries the response was YES. [2024-06-27 21:33:40,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73748 conditions, 8471 events. 5442/8471 cut-off events. For 824357/824365 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 52511 event pairs, 1551 based on Foata normal form. 9/8478 useless extension candidates. Maximal degree in co-relation 73521. Up to 8318 conditions per place. [2024-06-27 21:33:40,982 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 665 selfloop transitions, 62 changer transitions 0/730 dead transitions. [2024-06-27 21:33:40,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 730 transitions, 14469 flow [2024-06-27 21:33:40,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:33:40,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:33:40,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-27 21:33:40,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-27 21:33:40,984 INFO L175 Difference]: Start difference. First operand has 499 places, 711 transitions, 12861 flow. Second operand 8 states and 120 transitions. [2024-06-27 21:33:40,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 730 transitions, 14469 flow [2024-06-27 21:33:46,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 730 transitions, 14218 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-27 21:33:46,895 INFO L231 Difference]: Finished difference. Result has 503 places, 714 transitions, 12836 flow [2024-06-27 21:33:46,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12610, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=649, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12836, PETRI_PLACES=503, PETRI_TRANSITIONS=714} [2024-06-27 21:33:46,896 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 462 predicate places. [2024-06-27 21:33:46,896 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 714 transitions, 12836 flow [2024-06-27 21:33:46,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:46,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:46,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:46,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-27 21:33:46,896 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)] === [2024-06-27 21:33:46,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:46,897 INFO L85 PathProgramCache]: Analyzing trace with hash 632926824, now seen corresponding path program 9 times [2024-06-27 21:33:46,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:46,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446843162] [2024-06-27 21:33:46,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:46,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:46,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:47,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:47,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:47,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446843162] [2024-06-27 21:33:47,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446843162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:47,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:47,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:33:47,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409098327] [2024-06-27 21:33:47,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:47,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:33:47,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:47,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:33:47,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:33:47,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:33:47,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 714 transitions, 12836 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:47,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:47,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:33:47,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:49,826 INFO L124 PetriNetUnfolderBase]: 5447/8478 cut-off events. [2024-06-27 21:33:49,827 INFO L125 PetriNetUnfolderBase]: For 836470/836478 co-relation queries the response was YES. [2024-06-27 21:33:49,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73573 conditions, 8478 events. 5447/8478 cut-off events. For 836470/836478 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 52532 event pairs, 1549 based on Foata normal form. 9/8485 useless extension candidates. Maximal degree in co-relation 73345. Up to 8231 conditions per place. [2024-06-27 21:33:49,997 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 626 selfloop transitions, 109 changer transitions 0/738 dead transitions. [2024-06-27 21:33:49,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 738 transitions, 14870 flow [2024-06-27 21:33:49,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:33:49,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:33:49,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-27 21:33:49,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-06-27 21:33:49,998 INFO L175 Difference]: Start difference. First operand has 503 places, 714 transitions, 12836 flow. Second operand 8 states and 127 transitions. [2024-06-27 21:33:49,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 738 transitions, 14870 flow [2024-06-27 21:33:56,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 738 transitions, 14664 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-27 21:33:56,521 INFO L231 Difference]: Finished difference. Result has 504 places, 717 transitions, 12946 flow [2024-06-27 21:33:56,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12630, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=714, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=608, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12946, PETRI_PLACES=504, PETRI_TRANSITIONS=717} [2024-06-27 21:33:56,522 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 463 predicate places. [2024-06-27 21:33:56,522 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 717 transitions, 12946 flow [2024-06-27 21:33:56,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:56,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:56,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:56,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-27 21:33:56,523 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)] === [2024-06-27 21:33:56,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:56,523 INFO L85 PathProgramCache]: Analyzing trace with hash 644354664, now seen corresponding path program 10 times [2024-06-27 21:33:56,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:56,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16076541] [2024-06-27 21:33:56,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:56,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:56,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:57,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:57,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:57,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16076541] [2024-06-27 21:33:57,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16076541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:57,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:57,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:33:57,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775231902] [2024-06-27 21:33:57,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:57,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:33:57,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:57,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:33:57,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:33:57,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:33:57,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 717 transitions, 12946 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:57,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:57,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:33:57,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:59,496 INFO L124 PetriNetUnfolderBase]: 5452/8485 cut-off events. [2024-06-27 21:33:59,496 INFO L125 PetriNetUnfolderBase]: For 851544/851552 co-relation queries the response was YES. [2024-06-27 21:33:59,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73891 conditions, 8485 events. 5452/8485 cut-off events. For 851544/851552 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 52599 event pairs, 1553 based on Foata normal form. 9/8492 useless extension candidates. Maximal degree in co-relation 73663. Up to 8237 conditions per place. [2024-06-27 21:33:59,670 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 621 selfloop transitions, 114 changer transitions 0/738 dead transitions. [2024-06-27 21:33:59,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 738 transitions, 14811 flow [2024-06-27 21:33:59,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:33:59,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:33:59,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-27 21:33:59,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.384375 [2024-06-27 21:33:59,672 INFO L175 Difference]: Start difference. First operand has 504 places, 717 transitions, 12946 flow. Second operand 8 states and 123 transitions. [2024-06-27 21:33:59,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 738 transitions, 14811 flow [2024-06-27 21:34:07,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 738 transitions, 14498 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-27 21:34:07,828 INFO L231 Difference]: Finished difference. Result has 506 places, 721 transitions, 13000 flow [2024-06-27 21:34:07,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12646, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=717, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=607, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13000, PETRI_PLACES=506, PETRI_TRANSITIONS=721} [2024-06-27 21:34:07,829 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 465 predicate places. [2024-06-27 21:34:07,829 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 721 transitions, 13000 flow [2024-06-27 21:34:07,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:07,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:07,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:07,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-27 21:34:07,830 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)] === [2024-06-27 21:34:07,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:07,830 INFO L85 PathProgramCache]: Analyzing trace with hash 415334910, now seen corresponding path program 7 times [2024-06-27 21:34:07,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:07,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384424006] [2024-06-27 21:34:07,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:07,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:07,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:08,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:08,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:08,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384424006] [2024-06-27 21:34:08,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384424006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:08,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:08,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:34:08,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033606096] [2024-06-27 21:34:08,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:08,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:34:08,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:08,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:34:08,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:34:08,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:34:08,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 721 transitions, 13000 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:08,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:08,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:34:08,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:11,444 INFO L124 PetriNetUnfolderBase]: 5462/8506 cut-off events. [2024-06-27 21:34:11,444 INFO L125 PetriNetUnfolderBase]: For 873813/873813 co-relation queries the response was YES. [2024-06-27 21:34:11,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74019 conditions, 8506 events. 5462/8506 cut-off events. For 873813/873813 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 52776 event pairs, 1950 based on Foata normal form. 2/8507 useless extension candidates. Maximal degree in co-relation 73791. Up to 8413 conditions per place. [2024-06-27 21:34:11,588 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 711 selfloop transitions, 27 changer transitions 0/741 dead transitions. [2024-06-27 21:34:11,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 741 transitions, 14625 flow [2024-06-27 21:34:11,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:34:11,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:34:11,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-27 21:34:11,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.371875 [2024-06-27 21:34:11,589 INFO L175 Difference]: Start difference. First operand has 506 places, 721 transitions, 13000 flow. Second operand 8 states and 119 transitions. [2024-06-27 21:34:11,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 741 transitions, 14625 flow [2024-06-27 21:34:17,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 741 transitions, 14373 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-27 21:34:17,855 INFO L231 Difference]: Finished difference. Result has 511 places, 725 transitions, 12897 flow [2024-06-27 21:34:17,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12750, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=721, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=694, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12897, PETRI_PLACES=511, PETRI_TRANSITIONS=725} [2024-06-27 21:34:17,860 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 470 predicate places. [2024-06-27 21:34:17,860 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 725 transitions, 12897 flow [2024-06-27 21:34:17,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:17,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:17,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:17,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-27 21:34:17,861 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)] === [2024-06-27 21:34:17,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:17,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1007444170, now seen corresponding path program 11 times [2024-06-27 21:34:17,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:17,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846347088] [2024-06-27 21:34:17,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:17,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:17,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:18,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:18,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:18,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846347088] [2024-06-27 21:34:18,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846347088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:18,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:18,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:34:18,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115617295] [2024-06-27 21:34:18,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:18,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:34:18,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:18,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:34:18,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:34:18,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:34:18,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 725 transitions, 12897 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:18,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:18,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:34:18,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:21,563 INFO L124 PetriNetUnfolderBase]: 5480/8524 cut-off events. [2024-06-27 21:34:21,563 INFO L125 PetriNetUnfolderBase]: For 887123/887131 co-relation queries the response was YES. [2024-06-27 21:34:21,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74319 conditions, 8524 events. 5480/8524 cut-off events. For 887123/887131 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 52841 event pairs, 1551 based on Foata normal form. 9/8531 useless extension candidates. Maximal degree in co-relation 74089. Up to 8354 conditions per place. [2024-06-27 21:34:21,725 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 665 selfloop transitions, 81 changer transitions 0/749 dead transitions. [2024-06-27 21:34:21,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 749 transitions, 14892 flow [2024-06-27 21:34:21,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:34:21,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:34:21,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-27 21:34:21,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.371875 [2024-06-27 21:34:21,726 INFO L175 Difference]: Start difference. First operand has 511 places, 725 transitions, 12897 flow. Second operand 8 states and 119 transitions. [2024-06-27 21:34:21,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 749 transitions, 14892 flow [2024-06-27 21:34:28,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 749 transitions, 14784 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-27 21:34:28,989 INFO L231 Difference]: Finished difference. Result has 515 places, 735 transitions, 13244 flow [2024-06-27 21:34:28,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12789, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=725, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=647, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13244, PETRI_PLACES=515, PETRI_TRANSITIONS=735} [2024-06-27 21:34:28,990 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 474 predicate places. [2024-06-27 21:34:28,990 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 735 transitions, 13244 flow [2024-06-27 21:34:28,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:28,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:28,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:28,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-27 21:34:28,990 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)] === [2024-06-27 21:34:28,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:28,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1007681320, now seen corresponding path program 12 times [2024-06-27 21:34:28,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:28,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423854046] [2024-06-27 21:34:28,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:28,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:28,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:29,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:29,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:29,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423854046] [2024-06-27 21:34:29,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423854046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:29,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:29,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:34:29,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452419012] [2024-06-27 21:34:29,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:29,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:34:29,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:29,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:34:29,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:34:29,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:34:29,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 735 transitions, 13244 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:29,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:29,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:34:29,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:32,743 INFO L124 PetriNetUnfolderBase]: 5477/8520 cut-off events. [2024-06-27 21:34:32,744 INFO L125 PetriNetUnfolderBase]: For 897817/897825 co-relation queries the response was YES. [2024-06-27 21:34:32,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74397 conditions, 8520 events. 5477/8520 cut-off events. For 897817/897825 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 52887 event pairs, 1547 based on Foata normal form. 9/8527 useless extension candidates. Maximal degree in co-relation 74165. Up to 8351 conditions per place. [2024-06-27 21:34:32,902 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 665 selfloop transitions, 82 changer transitions 0/750 dead transitions. [2024-06-27 21:34:32,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 750 transitions, 14790 flow [2024-06-27 21:34:32,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:34:32,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:34:32,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 140 transitions. [2024-06-27 21:34:32,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35 [2024-06-27 21:34:32,904 INFO L175 Difference]: Start difference. First operand has 515 places, 735 transitions, 13244 flow. Second operand 10 states and 140 transitions. [2024-06-27 21:34:32,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 750 transitions, 14790 flow [2024-06-27 21:34:40,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 750 transitions, 14516 flow, removed 92 selfloop flow, removed 4 redundant places. [2024-06-27 21:34:40,913 INFO L231 Difference]: Finished difference. Result has 521 places, 735 transitions, 13140 flow [2024-06-27 21:34:40,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12970, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=735, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=653, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13140, PETRI_PLACES=521, PETRI_TRANSITIONS=735} [2024-06-27 21:34:40,914 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 480 predicate places. [2024-06-27 21:34:40,914 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 735 transitions, 13140 flow [2024-06-27 21:34:40,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:40,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:40,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:40,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-27 21:34:40,914 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)] === [2024-06-27 21:34:40,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:40,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1007681134, now seen corresponding path program 8 times [2024-06-27 21:34:40,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:40,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697521089] [2024-06-27 21:34:40,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:40,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:40,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:41,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:41,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:41,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697521089] [2024-06-27 21:34:41,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697521089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:41,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:41,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:34:41,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696904751] [2024-06-27 21:34:41,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:41,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:34:41,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:41,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:34:41,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:34:41,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:34:41,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 735 transitions, 13140 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:41,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:41,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:34:41,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:44,273 INFO L124 PetriNetUnfolderBase]: 5487/8534 cut-off events. [2024-06-27 21:34:44,274 INFO L125 PetriNetUnfolderBase]: For 917622/917630 co-relation queries the response was YES. [2024-06-27 21:34:44,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74575 conditions, 8534 events. 5487/8534 cut-off events. For 917622/917630 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 52879 event pairs, 1552 based on Foata normal form. 10/8542 useless extension candidates. Maximal degree in co-relation 74343. Up to 8274 conditions per place. [2024-06-27 21:34:44,422 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 655 selfloop transitions, 98 changer transitions 0/756 dead transitions. [2024-06-27 21:34:44,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 756 transitions, 15004 flow [2024-06-27 21:34:44,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:34:44,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:34:44,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-27 21:34:44,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39375 [2024-06-27 21:34:44,423 INFO L175 Difference]: Start difference. First operand has 521 places, 735 transitions, 13140 flow. Second operand 8 states and 126 transitions. [2024-06-27 21:34:44,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 756 transitions, 15004 flow [2024-06-27 21:34:52,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 756 transitions, 14820 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 21:34:52,072 INFO L231 Difference]: Finished difference. Result has 521 places, 738 transitions, 13230 flow [2024-06-27 21:34:52,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12956, PETRI_DIFFERENCE_MINUEND_PLACES=513, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=735, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=640, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13230, PETRI_PLACES=521, PETRI_TRANSITIONS=738} [2024-06-27 21:34:52,073 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 480 predicate places. [2024-06-27 21:34:52,073 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 738 transitions, 13230 flow [2024-06-27 21:34:52,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:52,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:52,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:52,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-27 21:34:52,074 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)] === [2024-06-27 21:34:52,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:52,074 INFO L85 PathProgramCache]: Analyzing trace with hash -153835604, now seen corresponding path program 9 times [2024-06-27 21:34:52,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:52,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601489479] [2024-06-27 21:34:52,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:52,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:52,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:52,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:52,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:52,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601489479] [2024-06-27 21:34:52,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601489479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:52,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:52,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:34:52,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131150403] [2024-06-27 21:34:52,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:52,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:34:52,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:52,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:34:52,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:34:52,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:34:52,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 738 transitions, 13230 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:52,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:52,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:34:52,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:55,373 INFO L124 PetriNetUnfolderBase]: 5523/8583 cut-off events. [2024-06-27 21:34:55,373 INFO L125 PetriNetUnfolderBase]: For 944524/944528 co-relation queries the response was YES. [2024-06-27 21:34:55,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75565 conditions, 8583 events. 5523/8583 cut-off events. For 944524/944528 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 53241 event pairs, 1548 based on Foata normal form. 6/8588 useless extension candidates. Maximal degree in co-relation 75332. Up to 8404 conditions per place. [2024-06-27 21:34:55,657 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 689 selfloop transitions, 79 changer transitions 0/771 dead transitions. [2024-06-27 21:34:55,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 771 transitions, 15284 flow [2024-06-27 21:34:55,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:34:55,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:34:55,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 21:34:55,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-27 21:34:55,659 INFO L175 Difference]: Start difference. First operand has 521 places, 738 transitions, 13230 flow. Second operand 7 states and 122 transitions. [2024-06-27 21:34:55,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 771 transitions, 15284 flow [2024-06-27 21:35:02,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 771 transitions, 15076 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-27 21:35:02,628 INFO L231 Difference]: Finished difference. Result has 525 places, 748 transitions, 13500 flow [2024-06-27 21:35:02,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13032, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=659, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13500, PETRI_PLACES=525, PETRI_TRANSITIONS=748} [2024-06-27 21:35:02,628 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 484 predicate places. [2024-06-27 21:35:02,628 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 748 transitions, 13500 flow [2024-06-27 21:35:02,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:02,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:02,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:02,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-27 21:35:02,629 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)] === [2024-06-27 21:35:02,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:02,629 INFO L85 PathProgramCache]: Analyzing trace with hash -559046834, now seen corresponding path program 10 times [2024-06-27 21:35:02,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:02,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178973976] [2024-06-27 21:35:02,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:02,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:02,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:03,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:03,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:03,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178973976] [2024-06-27 21:35:03,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178973976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:03,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:03,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:35:03,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950597602] [2024-06-27 21:35:03,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:03,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:35:03,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:03,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:35:03,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:35:03,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:35:03,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 748 transitions, 13500 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:03,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:03,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:35:03,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:06,034 INFO L124 PetriNetUnfolderBase]: 5533/8594 cut-off events. [2024-06-27 21:35:06,034 INFO L125 PetriNetUnfolderBase]: For 961503/961507 co-relation queries the response was YES. [2024-06-27 21:35:06,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75961 conditions, 8594 events. 5533/8594 cut-off events. For 961503/961507 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 53234 event pairs, 1550 based on Foata normal form. 6/8599 useless extension candidates. Maximal degree in co-relation 75725. Up to 8483 conditions per place. [2024-06-27 21:35:06,191 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 713 selfloop transitions, 50 changer transitions 0/766 dead transitions. [2024-06-27 21:35:06,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 766 transitions, 15173 flow [2024-06-27 21:35:06,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:35:06,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:35:06,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-27 21:35:06,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3892857142857143 [2024-06-27 21:35:06,193 INFO L175 Difference]: Start difference. First operand has 525 places, 748 transitions, 13500 flow. Second operand 7 states and 109 transitions. [2024-06-27 21:35:06,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 766 transitions, 15173 flow [2024-06-27 21:35:13,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 766 transitions, 15051 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-27 21:35:13,594 INFO L231 Difference]: Finished difference. Result has 529 places, 751 transitions, 13585 flow [2024-06-27 21:35:13,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13378, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=748, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=698, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13585, PETRI_PLACES=529, PETRI_TRANSITIONS=751} [2024-06-27 21:35:13,595 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 488 predicate places. [2024-06-27 21:35:13,595 INFO L495 AbstractCegarLoop]: Abstraction has has 529 places, 751 transitions, 13585 flow [2024-06-27 21:35:13,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:13,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:13,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:13,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-27 21:35:13,595 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)] === [2024-06-27 21:35:13,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:13,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1689194884, now seen corresponding path program 11 times [2024-06-27 21:35:13,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:13,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324085568] [2024-06-27 21:35:13,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:13,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:13,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:14,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:14,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:14,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324085568] [2024-06-27 21:35:14,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324085568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:14,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:14,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:35:14,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320654764] [2024-06-27 21:35:14,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:14,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:35:14,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:14,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:35:14,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:35:14,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:35:14,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 751 transitions, 13585 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:14,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:14,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:35:14,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:17,110 INFO L124 PetriNetUnfolderBase]: 5543/8619 cut-off events. [2024-06-27 21:35:17,111 INFO L125 PetriNetUnfolderBase]: For 983949/983949 co-relation queries the response was YES. [2024-06-27 21:35:17,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76216 conditions, 8619 events. 5543/8619 cut-off events. For 983949/983949 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 53528 event pairs, 1949 based on Foata normal form. 2/8620 useless extension candidates. Maximal degree in co-relation 75979. Up to 8514 conditions per place. [2024-06-27 21:35:17,256 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 733 selfloop transitions, 33 changer transitions 0/769 dead transitions. [2024-06-27 21:35:17,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 769 transitions, 15268 flow [2024-06-27 21:35:17,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:35:17,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:35:17,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-27 21:35:17,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-06-27 21:35:17,258 INFO L175 Difference]: Start difference. First operand has 529 places, 751 transitions, 13585 flow. Second operand 7 states and 108 transitions. [2024-06-27 21:35:17,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 769 transitions, 15268 flow [2024-06-27 21:35:24,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 769 transitions, 15105 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-27 21:35:24,771 INFO L231 Difference]: Finished difference. Result has 531 places, 754 transitions, 13585 flow [2024-06-27 21:35:24,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13422, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=751, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=718, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13585, PETRI_PLACES=531, PETRI_TRANSITIONS=754} [2024-06-27 21:35:24,772 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 490 predicate places. [2024-06-27 21:35:24,772 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 754 transitions, 13585 flow [2024-06-27 21:35:24,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:24,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:24,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:24,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-27 21:35:24,773 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)] === [2024-06-27 21:35:24,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:24,773 INFO L85 PathProgramCache]: Analyzing trace with hash -559284170, now seen corresponding path program 13 times [2024-06-27 21:35:24,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:24,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524822299] [2024-06-27 21:35:24,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:24,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:24,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:25,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:25,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:25,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524822299] [2024-06-27 21:35:25,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524822299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:25,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:25,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:35:25,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21545447] [2024-06-27 21:35:25,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:25,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:35:25,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:25,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:35:25,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:35:25,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:35:25,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 754 transitions, 13585 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:25,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:25,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:35:25,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:28,462 INFO L124 PetriNetUnfolderBase]: 5540/8604 cut-off events. [2024-06-27 21:35:28,462 INFO L125 PetriNetUnfolderBase]: For 983078/983082 co-relation queries the response was YES. [2024-06-27 21:35:28,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76030 conditions, 8604 events. 5540/8604 cut-off events. For 983078/983082 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 53303 event pairs, 1553 based on Foata normal form. 5/8608 useless extension candidates. Maximal degree in co-relation 75793. Up to 8469 conditions per place. [2024-06-27 21:35:28,618 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 714 selfloop transitions, 57 changer transitions 0/774 dead transitions. [2024-06-27 21:35:28,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 774 transitions, 15211 flow [2024-06-27 21:35:28,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:35:28,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:35:28,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-27 21:35:28,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-06-27 21:35:28,619 INFO L175 Difference]: Start difference. First operand has 531 places, 754 transitions, 13585 flow. Second operand 7 states and 114 transitions. [2024-06-27 21:35:28,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 774 transitions, 15211 flow [2024-06-27 21:35:37,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 774 transitions, 15017 flow, removed 79 selfloop flow, removed 3 redundant places. [2024-06-27 21:35:37,750 INFO L231 Difference]: Finished difference. Result has 535 places, 754 transitions, 13527 flow [2024-06-27 21:35:37,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13391, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=754, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=697, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13527, PETRI_PLACES=535, PETRI_TRANSITIONS=754} [2024-06-27 21:35:37,751 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 494 predicate places. [2024-06-27 21:35:37,751 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 754 transitions, 13527 flow [2024-06-27 21:35:37,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:37,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:37,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:37,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-27 21:35:37,751 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)] === [2024-06-27 21:35:37,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:37,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1688778988, now seen corresponding path program 14 times [2024-06-27 21:35:37,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:37,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547697141] [2024-06-27 21:35:37,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:37,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:37,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:38,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:38,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:38,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547697141] [2024-06-27 21:35:38,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547697141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:38,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:38,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:35:38,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122609587] [2024-06-27 21:35:38,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:38,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:35:38,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:38,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:35:38,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:35:38,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:35:38,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 754 transitions, 13527 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:38,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:38,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:35:38,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:41,348 INFO L124 PetriNetUnfolderBase]: 5537/8604 cut-off events. [2024-06-27 21:35:41,348 INFO L125 PetriNetUnfolderBase]: For 978752/978760 co-relation queries the response was YES. [2024-06-27 21:35:41,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75777 conditions, 8604 events. 5537/8604 cut-off events. For 978752/978760 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 53365 event pairs, 1558 based on Foata normal form. 9/8611 useless extension candidates. Maximal degree in co-relation 75539. Up to 8404 conditions per place. [2024-06-27 21:35:41,501 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 693 selfloop transitions, 77 changer transitions 0/773 dead transitions. [2024-06-27 21:35:41,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 773 transitions, 15359 flow [2024-06-27 21:35:41,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:35:41,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:35:41,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-27 21:35:41,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-27 21:35:41,502 INFO L175 Difference]: Start difference. First operand has 535 places, 754 transitions, 13527 flow. Second operand 7 states and 116 transitions. [2024-06-27 21:35:41,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 773 transitions, 15359 flow [2024-06-27 21:35:48,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 773 transitions, 15145 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-27 21:35:48,705 INFO L231 Difference]: Finished difference. Result has 535 places, 754 transitions, 13479 flow [2024-06-27 21:35:48,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13315, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=754, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=677, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13479, PETRI_PLACES=535, PETRI_TRANSITIONS=754} [2024-06-27 21:35:48,706 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 494 predicate places. [2024-06-27 21:35:48,706 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 754 transitions, 13479 flow [2024-06-27 21:35:48,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:48,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:48,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:48,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-27 21:35:48,706 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)] === [2024-06-27 21:35:48,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:48,707 INFO L85 PathProgramCache]: Analyzing trace with hash -559283984, now seen corresponding path program 12 times [2024-06-27 21:35:48,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:48,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044089629] [2024-06-27 21:35:48,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:48,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:48,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:49,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:49,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:49,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044089629] [2024-06-27 21:35:49,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044089629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:49,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:49,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:35:49,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413876707] [2024-06-27 21:35:49,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:49,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:35:49,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:49,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:35:49,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:35:49,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:35:49,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 754 transitions, 13479 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:49,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:49,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:35:49,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:52,056 INFO L124 PetriNetUnfolderBase]: 5531/8592 cut-off events. [2024-06-27 21:35:52,056 INFO L125 PetriNetUnfolderBase]: For 970189/970193 co-relation queries the response was YES. [2024-06-27 21:35:52,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75442 conditions, 8592 events. 5531/8592 cut-off events. For 970189/970193 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 53225 event pairs, 1554 based on Foata normal form. 6/8597 useless extension candidates. Maximal degree in co-relation 75204. Up to 8408 conditions per place. [2024-06-27 21:35:52,407 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 691 selfloop transitions, 80 changer transitions 0/774 dead transitions. [2024-06-27 21:35:52,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 774 transitions, 15319 flow [2024-06-27 21:35:52,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:35:52,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:35:52,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-27 21:35:52,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-27 21:35:52,408 INFO L175 Difference]: Start difference. First operand has 535 places, 754 transitions, 13479 flow. Second operand 7 states and 116 transitions. [2024-06-27 21:35:52,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 774 transitions, 15319 flow [2024-06-27 21:36:00,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 774 transitions, 15175 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 21:36:00,304 INFO L231 Difference]: Finished difference. Result has 536 places, 754 transitions, 13516 flow [2024-06-27 21:36:00,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13337, PETRI_DIFFERENCE_MINUEND_PLACES=529, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=754, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=674, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13516, PETRI_PLACES=536, PETRI_TRANSITIONS=754} [2024-06-27 21:36:00,305 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 495 predicate places. [2024-06-27 21:36:00,305 INFO L495 AbstractCegarLoop]: Abstraction has has 536 places, 754 transitions, 13516 flow [2024-06-27 21:36:00,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:00,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:00,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:00,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-27 21:36:00,305 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)] === [2024-06-27 21:36:00,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:00,306 INFO L85 PathProgramCache]: Analyzing trace with hash -382152464, now seen corresponding path program 13 times [2024-06-27 21:36:00,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:00,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566663286] [2024-06-27 21:36:00,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:00,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:00,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:00,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:00,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:00,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566663286] [2024-06-27 21:36:00,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566663286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:00,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:00,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:36:00,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157048840] [2024-06-27 21:36:00,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:00,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:36:00,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:00,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:36:00,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:36:00,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:36:00,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 754 transitions, 13516 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:00,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:00,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:36:00,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:03,518 INFO L124 PetriNetUnfolderBase]: 5525/8588 cut-off events. [2024-06-27 21:36:03,518 INFO L125 PetriNetUnfolderBase]: For 961855/961863 co-relation queries the response was YES. [2024-06-27 21:36:03,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75181 conditions, 8588 events. 5525/8588 cut-off events. For 961855/961863 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 53286 event pairs, 1549 based on Foata normal form. 10/8596 useless extension candidates. Maximal degree in co-relation 74944. Up to 8307 conditions per place. [2024-06-27 21:36:03,678 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 655 selfloop transitions, 115 changer transitions 0/773 dead transitions. [2024-06-27 21:36:03,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 773 transitions, 15356 flow [2024-06-27 21:36:03,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:36:03,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:36:03,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-27 21:36:03,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-27 21:36:03,679 INFO L175 Difference]: Start difference. First operand has 536 places, 754 transitions, 13516 flow. Second operand 7 states and 116 transitions. [2024-06-27 21:36:03,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 773 transitions, 15356 flow [2024-06-27 21:36:12,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 773 transitions, 15088 flow, removed 59 selfloop flow, removed 6 redundant places. [2024-06-27 21:36:12,112 INFO L231 Difference]: Finished difference. Result has 537 places, 754 transitions, 13494 flow [2024-06-27 21:36:12,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13250, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=754, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=639, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13494, PETRI_PLACES=537, PETRI_TRANSITIONS=754} [2024-06-27 21:36:12,112 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 496 predicate places. [2024-06-27 21:36:12,113 INFO L495 AbstractCegarLoop]: Abstraction has has 537 places, 754 transitions, 13494 flow [2024-06-27 21:36:12,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:12,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:12,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:12,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-27 21:36:12,113 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)] === [2024-06-27 21:36:12,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:12,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1695243604, now seen corresponding path program 14 times [2024-06-27 21:36:12,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:12,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409126814] [2024-06-27 21:36:12,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:12,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:12,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:12,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:12,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:12,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409126814] [2024-06-27 21:36:12,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409126814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:12,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:12,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:36:12,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151618150] [2024-06-27 21:36:12,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:12,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:36:12,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:12,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:36:12,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:36:12,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:36:12,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 537 places, 754 transitions, 13494 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:12,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:12,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:36:12,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:15,449 INFO L124 PetriNetUnfolderBase]: 5519/8576 cut-off events. [2024-06-27 21:36:15,449 INFO L125 PetriNetUnfolderBase]: For 946133/946137 co-relation queries the response was YES. [2024-06-27 21:36:15,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74740 conditions, 8576 events. 5519/8576 cut-off events. For 946133/946137 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 53201 event pairs, 1545 based on Foata normal form. 6/8581 useless extension candidates. Maximal degree in co-relation 74504. Up to 8450 conditions per place. [2024-06-27 21:36:15,605 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 714 selfloop transitions, 54 changer transitions 0/771 dead transitions. [2024-06-27 21:36:15,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 771 transitions, 15104 flow [2024-06-27 21:36:15,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:36:15,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:36:15,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-27 21:36:15,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42916666666666664 [2024-06-27 21:36:15,606 INFO L175 Difference]: Start difference. First operand has 537 places, 754 transitions, 13494 flow. Second operand 6 states and 103 transitions. [2024-06-27 21:36:15,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 771 transitions, 15104 flow [2024-06-27 21:36:23,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 771 transitions, 14798 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-27 21:36:23,828 INFO L231 Difference]: Finished difference. Result has 536 places, 754 transitions, 13328 flow [2024-06-27 21:36:23,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13188, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=754, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=700, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=13328, PETRI_PLACES=536, PETRI_TRANSITIONS=754} [2024-06-27 21:36:23,828 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 495 predicate places. [2024-06-27 21:36:23,829 INFO L495 AbstractCegarLoop]: Abstraction has has 536 places, 754 transitions, 13328 flow [2024-06-27 21:36:23,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:23,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:23,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:23,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-27 21:36:23,829 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)] === [2024-06-27 21:36:23,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:23,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1689016138, now seen corresponding path program 15 times [2024-06-27 21:36:23,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:23,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167325319] [2024-06-27 21:36:23,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:23,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:23,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:24,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:24,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:24,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167325319] [2024-06-27 21:36:24,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167325319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:24,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:24,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:36:24,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406152214] [2024-06-27 21:36:24,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:24,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:36:24,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:24,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:36:24,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:36:24,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:36:24,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 754 transitions, 13328 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:24,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:24,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:36:24,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:27,130 INFO L124 PetriNetUnfolderBase]: 5516/8576 cut-off events. [2024-06-27 21:36:27,131 INFO L125 PetriNetUnfolderBase]: For 920856/920864 co-relation queries the response was YES. [2024-06-27 21:36:27,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74149 conditions, 8576 events. 5516/8576 cut-off events. For 920856/920864 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 53162 event pairs, 1553 based on Foata normal form. 9/8583 useless extension candidates. Maximal degree in co-relation 73914. Up to 8377 conditions per place. [2024-06-27 21:36:27,284 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 687 selfloop transitions, 82 changer transitions 0/772 dead transitions. [2024-06-27 21:36:27,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 772 transitions, 14944 flow [2024-06-27 21:36:27,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:36:27,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:36:27,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-27 21:36:27,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-06-27 21:36:27,285 INFO L175 Difference]: Start difference. First operand has 536 places, 754 transitions, 13328 flow. Second operand 7 states and 114 transitions. [2024-06-27 21:36:27,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 772 transitions, 14944 flow [2024-06-27 21:36:33,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 772 transitions, 14702 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-27 21:36:34,000 INFO L231 Difference]: Finished difference. Result has 537 places, 754 transitions, 13260 flow [2024-06-27 21:36:34,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13086, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=754, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=672, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13260, PETRI_PLACES=537, PETRI_TRANSITIONS=754} [2024-06-27 21:36:34,000 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 496 predicate places. [2024-06-27 21:36:34,000 INFO L495 AbstractCegarLoop]: Abstraction has has 537 places, 754 transitions, 13260 flow [2024-06-27 21:36:34,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:34,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:34,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:34,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-27 21:36:34,001 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)] === [2024-06-27 21:36:34,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:34,001 INFO L85 PathProgramCache]: Analyzing trace with hash -559037906, now seen corresponding path program 2 times [2024-06-27 21:36:34,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:34,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676782681] [2024-06-27 21:36:34,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:34,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:34,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:34,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:34,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:34,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676782681] [2024-06-27 21:36:34,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676782681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:34,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:34,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:36:34,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119018144] [2024-06-27 21:36:34,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:34,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:36:34,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:34,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:36:34,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:36:34,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:36:34,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 537 places, 754 transitions, 13260 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:34,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:34,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:36:34,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand