./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 eb4cb34f 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-eb4cb34-m [2024-06-21 17:48:56,296 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 17:48:56,347 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 17:48:56,353 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 17:48:56,354 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 17:48:56,386 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 17:48:56,387 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 17:48:56,387 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 17:48:56,387 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 17:48:56,388 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 17:48:56,388 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 17:48:56,388 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 17:48:56,389 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 17:48:56,392 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 17:48:56,392 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 17:48:56,393 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 17:48:56,393 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 17:48:56,394 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 17:48:56,394 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 17:48:56,394 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 17:48:56,394 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 17:48:56,395 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 17:48:56,395 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 17:48:56,395 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 17:48:56,395 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 17:48:56,395 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 17:48:56,396 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 17:48:56,396 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 17:48:56,397 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 17:48:56,397 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 17:48:56,398 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 17:48:56,398 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 17:48:56,398 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:48:56,398 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 17:48:56,398 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 17:48:56,399 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 17:48:56,399 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 17:48:56,399 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 17:48:56,399 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 17:48:56,399 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 17:48:56,400 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 17:48:56,400 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 17:48:56,400 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 17:48:56,400 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 17:48:56,572 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 17:48:56,595 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 17:48:56,597 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 17:48:56,598 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 17:48:56,599 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 17:48:56,600 INFO L431 ainManager$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 [2024-06-21 17:48:56,736 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 17:48:56,737 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 17:48:56,737 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe021_power.opt_pso.opt.i [2024-06-21 17:48:57,700 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 17:48:57,892 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 17:48:57,892 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe021_power.opt_pso.opt.i [2024-06-21 17:48:57,933 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c24978a71/395514a9476e4fa5b8e2e89f93a409b4/FLAG98c7d8f69 [2024-06-21 17:48:57,943 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c24978a71/395514a9476e4fa5b8e2e89f93a409b4 [2024-06-21 17:48:57,943 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 17:48:57,944 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 17:48:57,945 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 17:48:57,945 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 17:48:57,964 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 17:48:57,965 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:48:56" (1/2) ... [2024-06-21 17:48:57,966 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f482d0a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:48:57, skipping insertion in model container [2024-06-21 17:48:57,966 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:48:56" (1/2) ... [2024-06-21 17:48:57,968 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2235b0c9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:48:57, skipping insertion in model container [2024-06-21 17:48:57,968 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:48:57" (2/2) ... [2024-06-21 17:48:57,969 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f482d0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:48:57, skipping insertion in model container [2024-06-21 17:48:57,970 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:48:57" (2/2) ... [2024-06-21 17:48:57,971 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 17:48:58,046 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 17:48:58,048 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)) [2024-06-21 17:48:58,048 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)) [2024-06-21 17:48:58,049 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)) [2024-06-21 17:48:58,049 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 17:48:58,049 INFO L106 edCorrectnessWitness]: ghost_update [L821-L821] multithreaded = 1; [2024-06-21 17:48:58,089 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 17:48:58,400 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:48:58,410 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 17:48:58,526 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:48:58,558 INFO L206 MainTranslator]: Completed translation [2024-06-21 17:48:58,559 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:48:58 WrapperNode [2024-06-21 17:48:58,559 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 17:48:58,560 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 17:48:58,561 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 17:48:58,561 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 17:48:58,566 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:48:58" (1/1) ... [2024-06-21 17:48:58,595 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:48:58" (1/1) ... [2024-06-21 17:48:58,627 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 144 [2024-06-21 17:48:58,635 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 17:48:58,636 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 17:48:58,636 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 17:48:58,637 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 17:48:58,645 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:48:58" (1/1) ... [2024-06-21 17:48:58,645 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:48:58" (1/1) ... [2024-06-21 17:48:58,655 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:48:58" (1/1) ... [2024-06-21 17:48:58,680 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]. [2024-06-21 17:48:58,686 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:48:58" (1/1) ... [2024-06-21 17:48:58,686 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:48:58" (1/1) ... [2024-06-21 17:48:58,692 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:48:58" (1/1) ... [2024-06-21 17:48:58,702 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:48:58" (1/1) ... [2024-06-21 17:48:58,705 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:48:58" (1/1) ... [2024-06-21 17:48:58,706 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:48:58" (1/1) ... [2024-06-21 17:48:58,708 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 17:48:58,720 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 17:48:58,721 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 17:48:58,721 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 17:48:58,721 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:48:58" (1/1) ... [2024-06-21 17:48:58,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:48:58,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 17:48:58,748 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) [2024-06-21 17:48:58,760 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 [2024-06-21 17:48:58,781 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 17:48:58,781 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 17:48:58,781 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 17:48:58,781 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 17:48:58,781 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 17:48:58,782 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 17:48:58,782 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 17:48:58,782 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 17:48:58,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 17:48:58,782 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 17:48:58,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 17:48:58,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 17:48:58,783 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 17:48:58,890 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 17:48:58,892 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 17:48:59,182 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 17:48:59,182 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 17:48:59,288 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 17:48:59,288 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 17:48:59,289 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:48:59 BoogieIcfgContainer [2024-06-21 17:48:59,289 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 17:48:59,292 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 17:48:59,292 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 17:48:59,295 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 17:48:59,295 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:48:56" (1/4) ... [2024-06-21 17:48:59,295 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1652bda0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:48:59, skipping insertion in model container [2024-06-21 17:48:59,296 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 05:48:57" (2/4) ... [2024-06-21 17:48:59,296 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1652bda0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 05:48:59, skipping insertion in model container [2024-06-21 17:48:59,296 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:48:58" (3/4) ... [2024-06-21 17:48:59,297 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1652bda0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 05:48:59, skipping insertion in model container [2024-06-21 17:48:59,297 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:48:59" (4/4) ... [2024-06-21 17:48:59,298 INFO L112 eAbstractionObserver]: Analyzing ICFG safe021_power.opt_pso.opt.i [2024-06-21 17:48:59,311 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 17:48:59,311 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 17:48:59,312 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 17:48:59,408 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 17:48:59,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-21 17:48:59,459 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-21 17:48:59,459 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:48:59,462 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. [2024-06-21 17:48:59,462 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-21 17:48:59,465 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-21 17:48:59,472 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 17:48:59,477 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;@21d5e6bd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 17:48:59,478 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 17:48:59,480 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 17:48:59,480 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 17:48:59,480 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:48:59,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:59,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 17:48:59,481 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)] === [2024-06-21 17:48:59,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:59,485 INFO L85 PathProgramCache]: Analyzing trace with hash 372110564, now seen corresponding path program 1 times [2024-06-21 17:48:59,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:59,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464975132] [2024-06-21 17:48:59,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:59,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:59,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:00,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:00,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:00,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464975132] [2024-06-21 17:49:00,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464975132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:00,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:00,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 17:49:00,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348558055] [2024-06-21 17:49:00,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:00,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 17:49:00,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:00,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 17:49:00,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 17:49:00,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-21 17:49:00,204 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) [2024-06-21 17:49:00,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:00,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-21 17:49:00,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:00,451 INFO L124 PetriNetUnfolderBase]: 1152/1755 cut-off events. [2024-06-21 17:49:00,451 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-06-21 17:49:00,455 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. [2024-06-21 17:49:00,462 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 32 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-21 17:49:00,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 42 transitions, 171 flow [2024-06-21 17:49:00,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 17:49:00,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 17:49:00,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-21 17:49:00,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 17:49:00,472 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 72 transitions. [2024-06-21 17:49:00,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 42 transitions, 171 flow [2024-06-21 17:49:00,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 42 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 17:49:00,476 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-21 17:49:00,477 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} [2024-06-21 17:49:00,480 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-21 17:49:00,480 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-21 17:49:00,480 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) [2024-06-21 17:49:00,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:00,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:00,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 17:49:00,481 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)] === [2024-06-21 17:49:00,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:00,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1117077401, now seen corresponding path program 1 times [2024-06-21 17:49:00,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:00,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416881085] [2024-06-21 17:49:00,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:00,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:00,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:00,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:00,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:00,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416881085] [2024-06-21 17:49:00,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416881085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:00,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:00,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 17:49:00,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12420107] [2024-06-21 17:49:00,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:00,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 17:49:00,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:00,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 17:49:00,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 17:49:00,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 17:49:00,853 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) [2024-06-21 17:49:00,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:00,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 17:49:00,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:01,063 INFO L124 PetriNetUnfolderBase]: 1395/2101 cut-off events. [2024-06-21 17:49:01,063 INFO L125 PetriNetUnfolderBase]: For 316/316 co-relation queries the response was YES. [2024-06-21 17:49:01,066 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. [2024-06-21 17:49:01,072 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 42 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-21 17:49:01,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 54 transitions, 252 flow [2024-06-21 17:49:01,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 17:49:01,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 17:49:01,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 89 transitions. [2024-06-21 17:49:01,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55625 [2024-06-21 17:49:01,074 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 89 transitions. [2024-06-21 17:49:01,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 54 transitions, 252 flow [2024-06-21 17:49:01,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 54 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 17:49:01,076 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 150 flow [2024-06-21 17:49:01,076 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} [2024-06-21 17:49:01,077 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2024-06-21 17:49:01,077 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 150 flow [2024-06-21 17:49:01,077 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) [2024-06-21 17:49:01,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:01,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:01,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 17:49:01,078 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)] === [2024-06-21 17:49:01,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:01,078 INFO L85 PathProgramCache]: Analyzing trace with hash 269662507, now seen corresponding path program 1 times [2024-06-21 17:49:01,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:01,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537939326] [2024-06-21 17:49:01,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:01,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:01,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:01,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:01,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:01,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537939326] [2024-06-21 17:49:01,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537939326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:01,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:01,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 17:49:01,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658759737] [2024-06-21 17:49:01,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:01,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 17:49:01,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:01,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 17:49:01,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 17:49:01,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 17:49:01,576 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) [2024-06-21 17:49:01,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:01,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 17:49:01,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:01,813 INFO L124 PetriNetUnfolderBase]: 1383/2083 cut-off events. [2024-06-21 17:49:01,814 INFO L125 PetriNetUnfolderBase]: For 1050/1058 co-relation queries the response was YES. [2024-06-21 17:49:01,816 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. [2024-06-21 17:49:01,822 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 50 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2024-06-21 17:49:01,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 65 transitions, 338 flow [2024-06-21 17:49:01,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:49:01,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:49:01,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2024-06-21 17:49:01,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-21 17:49:01,840 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 150 flow. Second operand 5 states and 110 transitions. [2024-06-21 17:49:01,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 65 transitions, 338 flow [2024-06-21 17:49:01,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 65 transitions, 336 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-21 17:49:01,842 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 196 flow [2024-06-21 17:49:01,843 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} [2024-06-21 17:49:01,843 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 9 predicate places. [2024-06-21 17:49:01,843 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 196 flow [2024-06-21 17:49:01,843 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) [2024-06-21 17:49:01,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:01,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:01,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 17:49:01,844 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)] === [2024-06-21 17:49:01,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:01,844 INFO L85 PathProgramCache]: Analyzing trace with hash -265907840, now seen corresponding path program 1 times [2024-06-21 17:49:01,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:01,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431779284] [2024-06-21 17:49:01,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:01,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:01,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:02,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:02,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:02,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431779284] [2024-06-21 17:49:02,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431779284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:02,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:02,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:49:02,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421217105] [2024-06-21 17:49:02,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:02,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:49:02,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:02,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:49:02,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:49:02,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 17:49:02,696 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) [2024-06-21 17:49:02,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:02,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 17:49:02,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:02,969 INFO L124 PetriNetUnfolderBase]: 1374/2068 cut-off events. [2024-06-21 17:49:02,969 INFO L125 PetriNetUnfolderBase]: For 1915/1923 co-relation queries the response was YES. [2024-06-21 17:49:02,972 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. [2024-06-21 17:49:02,978 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 54 selfloop transitions, 12 changer transitions 0/71 dead transitions. [2024-06-21 17:49:02,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 71 transitions, 402 flow [2024-06-21 17:49:02,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:49:02,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:49:02,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-21 17:49:02,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-21 17:49:02,981 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 196 flow. Second operand 6 states and 126 transitions. [2024-06-21 17:49:02,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 71 transitions, 402 flow [2024-06-21 17:49:02,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 71 transitions, 380 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 17:49:02,984 INFO L231 Difference]: Finished difference. Result has 52 places, 44 transitions, 215 flow [2024-06-21 17:49:02,984 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} [2024-06-21 17:49:02,985 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 11 predicate places. [2024-06-21 17:49:02,985 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 44 transitions, 215 flow [2024-06-21 17:49:02,985 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) [2024-06-21 17:49:02,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:02,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:02,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 17:49:02,986 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)] === [2024-06-21 17:49:02,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:02,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1195026544, now seen corresponding path program 1 times [2024-06-21 17:49:02,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:02,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129175104] [2024-06-21 17:49:02,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:02,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:02,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:03,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:03,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:03,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129175104] [2024-06-21 17:49:03,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129175104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:03,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:03,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:49:03,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096820979] [2024-06-21 17:49:03,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:03,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:49:03,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:03,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:49:03,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:49:03,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:49:03,503 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) [2024-06-21 17:49:03,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:03,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:49:03,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:03,754 INFO L124 PetriNetUnfolderBase]: 1245/1901 cut-off events. [2024-06-21 17:49:03,755 INFO L125 PetriNetUnfolderBase]: For 2916/2940 co-relation queries the response was YES. [2024-06-21 17:49:03,758 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. [2024-06-21 17:49:03,764 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 43 selfloop transitions, 10 changer transitions 0/62 dead transitions. [2024-06-21 17:49:03,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 62 transitions, 375 flow [2024-06-21 17:49:03,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:49:03,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:49:03,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-21 17:49:03,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 17:49:03,766 INFO L175 Difference]: Start difference. First operand has 52 places, 44 transitions, 215 flow. Second operand 5 states and 90 transitions. [2024-06-21 17:49:03,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 62 transitions, 375 flow [2024-06-21 17:49:03,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 62 transitions, 344 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 17:49:03,769 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 255 flow [2024-06-21 17:49:03,769 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} [2024-06-21 17:49:03,770 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 13 predicate places. [2024-06-21 17:49:03,770 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 255 flow [2024-06-21 17:49:03,770 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) [2024-06-21 17:49:03,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:03,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:03,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 17:49:03,771 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)] === [2024-06-21 17:49:03,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:03,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1608883590, now seen corresponding path program 1 times [2024-06-21 17:49:03,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:03,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100698627] [2024-06-21 17:49:03,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:03,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:03,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:04,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:04,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:04,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100698627] [2024-06-21 17:49:04,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100698627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:04,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:04,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:49:04,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065199764] [2024-06-21 17:49:04,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:04,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:49:04,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:04,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:49:04,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:49:04,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:49:04,334 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) [2024-06-21 17:49:04,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:04,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:49:04,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:04,668 INFO L124 PetriNetUnfolderBase]: 1476/2247 cut-off events. [2024-06-21 17:49:04,668 INFO L125 PetriNetUnfolderBase]: For 4593/4613 co-relation queries the response was YES. [2024-06-21 17:49:04,672 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. [2024-06-21 17:49:04,680 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 55 selfloop transitions, 11 changer transitions 0/74 dead transitions. [2024-06-21 17:49:04,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 74 transitions, 473 flow [2024-06-21 17:49:04,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:49:04,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:49:04,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-21 17:49:04,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 17:49:04,682 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 255 flow. Second operand 6 states and 100 transitions. [2024-06-21 17:49:04,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 74 transitions, 473 flow [2024-06-21 17:49:04,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 74 transitions, 455 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-21 17:49:04,686 INFO L231 Difference]: Finished difference. Result has 60 places, 59 transitions, 337 flow [2024-06-21 17:49:04,686 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} [2024-06-21 17:49:04,686 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 19 predicate places. [2024-06-21 17:49:04,686 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 59 transitions, 337 flow [2024-06-21 17:49:04,687 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) [2024-06-21 17:49:04,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:04,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:04,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 17:49:04,687 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)] === [2024-06-21 17:49:04,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:04,688 INFO L85 PathProgramCache]: Analyzing trace with hash -611616827, now seen corresponding path program 1 times [2024-06-21 17:49:04,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:04,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199774985] [2024-06-21 17:49:04,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:04,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:04,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:05,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:05,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:05,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199774985] [2024-06-21 17:49:05,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199774985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:05,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:05,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:49:05,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196544366] [2024-06-21 17:49:05,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:05,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:49:05,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:05,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:49:05,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:49:05,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:49:05,307 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) [2024-06-21 17:49:05,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:05,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:49:05,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:05,625 INFO L124 PetriNetUnfolderBase]: 1530/2300 cut-off events. [2024-06-21 17:49:05,625 INFO L125 PetriNetUnfolderBase]: For 5830/5860 co-relation queries the response was YES. [2024-06-21 17:49:05,630 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. [2024-06-21 17:49:05,639 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 60 selfloop transitions, 13 changer transitions 0/80 dead transitions. [2024-06-21 17:49:05,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 80 transitions, 545 flow [2024-06-21 17:49:05,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:49:05,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:49:05,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-21 17:49:05,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42916666666666664 [2024-06-21 17:49:05,641 INFO L175 Difference]: Start difference. First operand has 60 places, 59 transitions, 337 flow. Second operand 6 states and 103 transitions. [2024-06-21 17:49:05,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 80 transitions, 545 flow [2024-06-21 17:49:05,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 80 transitions, 539 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-21 17:49:05,646 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 387 flow [2024-06-21 17:49:05,646 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} [2024-06-21 17:49:05,646 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 24 predicate places. [2024-06-21 17:49:05,647 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 387 flow [2024-06-21 17:49:05,647 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) [2024-06-21 17:49:05,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:05,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:05,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 17:49:05,647 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)] === [2024-06-21 17:49:05,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:05,648 INFO L85 PathProgramCache]: Analyzing trace with hash -639115067, now seen corresponding path program 2 times [2024-06-21 17:49:05,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:05,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161789805] [2024-06-21 17:49:05,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:05,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:05,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:06,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:06,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:06,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161789805] [2024-06-21 17:49:06,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161789805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:06,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:06,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:49:06,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492605169] [2024-06-21 17:49:06,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:06,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:49:06,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:06,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:49:06,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:49:06,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:49:06,185 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) [2024-06-21 17:49:06,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:06,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:49:06,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:06,477 INFO L124 PetriNetUnfolderBase]: 1554/2337 cut-off events. [2024-06-21 17:49:06,477 INFO L125 PetriNetUnfolderBase]: For 7850/7895 co-relation queries the response was YES. [2024-06-21 17:49:06,482 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. [2024-06-21 17:49:06,494 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 57 selfloop transitions, 19 changer transitions 0/83 dead transitions. [2024-06-21 17:49:06,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 83 transitions, 621 flow [2024-06-21 17:49:06,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:49:06,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:49:06,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-21 17:49:06,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 17:49:06,497 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 387 flow. Second operand 6 states and 102 transitions. [2024-06-21 17:49:06,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 83 transitions, 621 flow [2024-06-21 17:49:06,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 83 transitions, 589 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 17:49:06,505 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 467 flow [2024-06-21 17:49:06,505 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} [2024-06-21 17:49:06,507 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 27 predicate places. [2024-06-21 17:49:06,507 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 467 flow [2024-06-21 17:49:06,508 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) [2024-06-21 17:49:06,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:06,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:06,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 17:49:06,508 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)] === [2024-06-21 17:49:06,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:06,509 INFO L85 PathProgramCache]: Analyzing trace with hash -639107131, now seen corresponding path program 1 times [2024-06-21 17:49:06,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:06,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409528935] [2024-06-21 17:49:06,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:06,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:06,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:07,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:07,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:07,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409528935] [2024-06-21 17:49:07,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409528935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:07,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:07,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:49:07,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202132054] [2024-06-21 17:49:07,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:07,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:49:07,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:07,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:49:07,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:49:07,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:49:07,342 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) [2024-06-21 17:49:07,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:07,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:49:07,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:07,680 INFO L124 PetriNetUnfolderBase]: 1573/2375 cut-off events. [2024-06-21 17:49:07,680 INFO L125 PetriNetUnfolderBase]: For 11274/11359 co-relation queries the response was YES. [2024-06-21 17:49:07,685 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. [2024-06-21 17:49:07,694 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 64 selfloop transitions, 16 changer transitions 0/91 dead transitions. [2024-06-21 17:49:07,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 91 transitions, 702 flow [2024-06-21 17:49:07,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:49:07,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:49:07,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-21 17:49:07,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-06-21 17:49:07,695 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 467 flow. Second operand 8 states and 124 transitions. [2024-06-21 17:49:07,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 91 transitions, 702 flow [2024-06-21 17:49:07,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 91 transitions, 658 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-21 17:49:07,703 INFO L231 Difference]: Finished difference. Result has 74 places, 73 transitions, 503 flow [2024-06-21 17:49:07,703 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} [2024-06-21 17:49:07,704 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 33 predicate places. [2024-06-21 17:49:07,704 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 73 transitions, 503 flow [2024-06-21 17:49:07,704 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) [2024-06-21 17:49:07,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:07,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:07,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 17:49:07,705 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)] === [2024-06-21 17:49:07,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:07,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1014233227, now seen corresponding path program 1 times [2024-06-21 17:49:07,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:07,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704828528] [2024-06-21 17:49:07,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:07,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:07,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:08,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:08,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:08,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704828528] [2024-06-21 17:49:08,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704828528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:08,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:08,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:49:08,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359598792] [2024-06-21 17:49:08,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:08,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:49:08,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:08,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:49:08,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:49:08,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:49:08,297 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) [2024-06-21 17:49:08,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:08,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:49:08,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:08,665 INFO L124 PetriNetUnfolderBase]: 1576/2381 cut-off events. [2024-06-21 17:49:08,665 INFO L125 PetriNetUnfolderBase]: For 12911/12997 co-relation queries the response was YES. [2024-06-21 17:49:08,670 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. [2024-06-21 17:49:08,677 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 79 selfloop transitions, 25 changer transitions 0/112 dead transitions. [2024-06-21 17:49:08,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 112 transitions, 835 flow [2024-06-21 17:49:08,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:49:08,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:49:08,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 17:49:08,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434375 [2024-06-21 17:49:08,679 INFO L175 Difference]: Start difference. First operand has 74 places, 73 transitions, 503 flow. Second operand 8 states and 139 transitions. [2024-06-21 17:49:08,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 112 transitions, 835 flow [2024-06-21 17:49:08,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 112 transitions, 801 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 17:49:08,688 INFO L231 Difference]: Finished difference. Result has 79 places, 84 transitions, 600 flow [2024-06-21 17:49:08,688 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} [2024-06-21 17:49:08,689 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 38 predicate places. [2024-06-21 17:49:08,689 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 84 transitions, 600 flow [2024-06-21 17:49:08,689 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) [2024-06-21 17:49:08,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:08,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:08,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 17:49:08,690 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)] === [2024-06-21 17:49:08,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:08,691 INFO L85 PathProgramCache]: Analyzing trace with hash 2016706347, now seen corresponding path program 2 times [2024-06-21 17:49:08,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:08,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265778939] [2024-06-21 17:49:08,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:08,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:08,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:09,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:09,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:09,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265778939] [2024-06-21 17:49:09,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265778939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:09,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:09,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:49:09,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39522162] [2024-06-21 17:49:09,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:09,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:49:09,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:09,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:49:09,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:49:09,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:49:09,288 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) [2024-06-21 17:49:09,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:09,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:49:09,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:09,664 INFO L124 PetriNetUnfolderBase]: 1637/2473 cut-off events. [2024-06-21 17:49:09,664 INFO L125 PetriNetUnfolderBase]: For 16555/16688 co-relation queries the response was YES. [2024-06-21 17:49:09,672 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. [2024-06-21 17:49:09,681 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 83 selfloop transitions, 39 changer transitions 0/130 dead transitions. [2024-06-21 17:49:09,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 130 transitions, 1083 flow [2024-06-21 17:49:09,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:49:09,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:49:09,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 17:49:09,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 17:49:09,682 INFO L175 Difference]: Start difference. First operand has 79 places, 84 transitions, 600 flow. Second operand 8 states and 140 transitions. [2024-06-21 17:49:09,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 130 transitions, 1083 flow [2024-06-21 17:49:09,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 130 transitions, 1014 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-21 17:49:09,694 INFO L231 Difference]: Finished difference. Result has 87 places, 105 transitions, 841 flow [2024-06-21 17:49:09,694 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} [2024-06-21 17:49:09,694 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 46 predicate places. [2024-06-21 17:49:09,694 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 105 transitions, 841 flow [2024-06-21 17:49:09,694 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) [2024-06-21 17:49:09,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:09,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:09,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 17:49:09,695 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)] === [2024-06-21 17:49:09,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:09,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1983643173, now seen corresponding path program 1 times [2024-06-21 17:49:09,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:09,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476555109] [2024-06-21 17:49:09,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:09,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:09,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:10,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:10,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:10,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476555109] [2024-06-21 17:49:10,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476555109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:10,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:10,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:49:10,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355883638] [2024-06-21 17:49:10,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:10,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:49:10,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:10,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:49:10,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:49:10,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:49:10,270 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) [2024-06-21 17:49:10,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:10,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:49:10,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:10,648 INFO L124 PetriNetUnfolderBase]: 1791/2684 cut-off events. [2024-06-21 17:49:10,649 INFO L125 PetriNetUnfolderBase]: For 18644/18644 co-relation queries the response was YES. [2024-06-21 17:49:10,655 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. [2024-06-21 17:49:10,664 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 120 selfloop transitions, 20 changer transitions 0/143 dead transitions. [2024-06-21 17:49:10,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 143 transitions, 1319 flow [2024-06-21 17:49:10,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:49:10,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:49:10,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 17:49:10,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-06-21 17:49:10,666 INFO L175 Difference]: Start difference. First operand has 87 places, 105 transitions, 841 flow. Second operand 8 states and 127 transitions. [2024-06-21 17:49:10,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 143 transitions, 1319 flow [2024-06-21 17:49:10,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 143 transitions, 1262 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-21 17:49:10,685 INFO L231 Difference]: Finished difference. Result has 95 places, 119 transitions, 988 flow [2024-06-21 17:49:10,686 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} [2024-06-21 17:49:10,686 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 54 predicate places. [2024-06-21 17:49:10,686 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 119 transitions, 988 flow [2024-06-21 17:49:10,687 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) [2024-06-21 17:49:10,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:10,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:10,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 17:49:10,688 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)] === [2024-06-21 17:49:10,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:10,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1458916289, now seen corresponding path program 3 times [2024-06-21 17:49:10,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:10,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137867461] [2024-06-21 17:49:10,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:10,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:10,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:11,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:11,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:11,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137867461] [2024-06-21 17:49:11,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137867461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:11,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:11,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:49:11,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212362499] [2024-06-21 17:49:11,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:11,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:49:11,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:11,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:49:11,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:49:11,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:49:11,374 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) [2024-06-21 17:49:11,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:11,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:49:11,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:11,779 INFO L124 PetriNetUnfolderBase]: 1721/2604 cut-off events. [2024-06-21 17:49:11,779 INFO L125 PetriNetUnfolderBase]: For 24438/24530 co-relation queries the response was YES. [2024-06-21 17:49:11,789 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. [2024-06-21 17:49:11,797 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 90 selfloop transitions, 54 changer transitions 0/156 dead transitions. [2024-06-21 17:49:11,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 156 transitions, 1513 flow [2024-06-21 17:49:11,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:49:11,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:49:11,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 17:49:11,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.446875 [2024-06-21 17:49:11,799 INFO L175 Difference]: Start difference. First operand has 95 places, 119 transitions, 988 flow. Second operand 8 states and 143 transitions. [2024-06-21 17:49:11,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 156 transitions, 1513 flow [2024-06-21 17:49:11,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 156 transitions, 1476 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-21 17:49:11,817 INFO L231 Difference]: Finished difference. Result has 102 places, 128 transitions, 1196 flow [2024-06-21 17:49:11,818 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} [2024-06-21 17:49:11,818 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 61 predicate places. [2024-06-21 17:49:11,819 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 128 transitions, 1196 flow [2024-06-21 17:49:11,819 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) [2024-06-21 17:49:11,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:11,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:11,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 17:49:11,819 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)] === [2024-06-21 17:49:11,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:11,820 INFO L85 PathProgramCache]: Analyzing trace with hash -163566649, now seen corresponding path program 4 times [2024-06-21 17:49:11,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:11,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030051750] [2024-06-21 17:49:11,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:11,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:11,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:12,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:12,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:12,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030051750] [2024-06-21 17:49:12,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030051750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:12,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:12,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:49:12,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089676829] [2024-06-21 17:49:12,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:12,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:49:12,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:12,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:49:12,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:49:12,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:49:12,466 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) [2024-06-21 17:49:12,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:12,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:49:12,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:12,937 INFO L124 PetriNetUnfolderBase]: 1704/2582 cut-off events. [2024-06-21 17:49:12,937 INFO L125 PetriNetUnfolderBase]: For 29754/29895 co-relation queries the response was YES. [2024-06-21 17:49:12,946 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. [2024-06-21 17:49:12,955 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 94 selfloop transitions, 48 changer transitions 0/154 dead transitions. [2024-06-21 17:49:12,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 154 transitions, 1600 flow [2024-06-21 17:49:12,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:49:12,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:49:12,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 17:49:12,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392857142857143 [2024-06-21 17:49:12,957 INFO L175 Difference]: Start difference. First operand has 102 places, 128 transitions, 1196 flow. Second operand 7 states and 123 transitions. [2024-06-21 17:49:12,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 154 transitions, 1600 flow [2024-06-21 17:49:12,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 154 transitions, 1524 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 17:49:12,984 INFO L231 Difference]: Finished difference. Result has 105 places, 131 transitions, 1282 flow [2024-06-21 17:49:12,984 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} [2024-06-21 17:49:12,984 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 64 predicate places. [2024-06-21 17:49:12,984 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 131 transitions, 1282 flow [2024-06-21 17:49:12,985 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) [2024-06-21 17:49:12,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:12,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:12,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 17:49:12,985 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)] === [2024-06-21 17:49:12,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:12,986 INFO L85 PathProgramCache]: Analyzing trace with hash -228447865, now seen corresponding path program 2 times [2024-06-21 17:49:12,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:12,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666743824] [2024-06-21 17:49:12,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:12,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:12,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:13,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:13,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:13,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666743824] [2024-06-21 17:49:13,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666743824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:13,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:13,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:49:13,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960884387] [2024-06-21 17:49:13,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:13,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:49:13,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:13,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:49:13,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:49:13,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:49:13,580 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) [2024-06-21 17:49:13,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:13,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:49:13,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:14,044 INFO L124 PetriNetUnfolderBase]: 1895/2833 cut-off events. [2024-06-21 17:49:14,046 INFO L125 PetriNetUnfolderBase]: For 31733/31735 co-relation queries the response was YES. [2024-06-21 17:49:14,055 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. [2024-06-21 17:49:14,063 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 130 selfloop transitions, 24 changer transitions 0/157 dead transitions. [2024-06-21 17:49:14,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 157 transitions, 1708 flow [2024-06-21 17:49:14,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:49:14,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:49:14,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-21 17:49:14,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 17:49:14,065 INFO L175 Difference]: Start difference. First operand has 105 places, 131 transitions, 1282 flow. Second operand 7 states and 112 transitions. [2024-06-21 17:49:14,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 157 transitions, 1708 flow [2024-06-21 17:49:14,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 157 transitions, 1612 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 17:49:14,092 INFO L231 Difference]: Finished difference. Result has 108 places, 137 transitions, 1314 flow [2024-06-21 17:49:14,092 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} [2024-06-21 17:49:14,093 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 67 predicate places. [2024-06-21 17:49:14,093 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 137 transitions, 1314 flow [2024-06-21 17:49:14,094 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) [2024-06-21 17:49:14,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:14,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:14,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 17:49:14,094 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)] === [2024-06-21 17:49:14,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:14,095 INFO L85 PathProgramCache]: Analyzing trace with hash -228448051, now seen corresponding path program 5 times [2024-06-21 17:49:14,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:14,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118367932] [2024-06-21 17:49:14,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:14,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:14,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:14,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:14,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:14,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118367932] [2024-06-21 17:49:14,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118367932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:14,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:14,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:49:14,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519109778] [2024-06-21 17:49:14,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:14,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:49:14,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:14,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:49:14,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:49:14,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:49:14,667 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) [2024-06-21 17:49:14,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:14,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:49:14,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:15,113 INFO L124 PetriNetUnfolderBase]: 1796/2714 cut-off events. [2024-06-21 17:49:15,113 INFO L125 PetriNetUnfolderBase]: For 38840/38948 co-relation queries the response was YES. [2024-06-21 17:49:15,123 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. [2024-06-21 17:49:15,133 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 91 selfloop transitions, 62 changer transitions 0/167 dead transitions. [2024-06-21 17:49:15,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 167 transitions, 1856 flow [2024-06-21 17:49:15,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:49:15,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:49:15,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 17:49:15,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-21 17:49:15,134 INFO L175 Difference]: Start difference. First operand has 108 places, 137 transitions, 1314 flow. Second operand 7 states and 125 transitions. [2024-06-21 17:49:15,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 167 transitions, 1856 flow [2024-06-21 17:49:15,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 167 transitions, 1811 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 17:49:15,168 INFO L231 Difference]: Finished difference. Result has 112 places, 143 transitions, 1509 flow [2024-06-21 17:49:15,169 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} [2024-06-21 17:49:15,169 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 71 predicate places. [2024-06-21 17:49:15,169 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 143 transitions, 1509 flow [2024-06-21 17:49:15,170 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) [2024-06-21 17:49:15,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:15,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:15,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 17:49:15,171 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)] === [2024-06-21 17:49:15,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:15,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1662507343, now seen corresponding path program 3 times [2024-06-21 17:49:15,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:15,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263546556] [2024-06-21 17:49:15,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:15,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:15,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:15,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:15,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:15,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263546556] [2024-06-21 17:49:15,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263546556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:15,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:15,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:49:15,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132269778] [2024-06-21 17:49:15,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:15,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:49:15,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:15,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:49:15,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:49:15,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:49:15,763 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) [2024-06-21 17:49:15,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:15,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:49:15,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:16,152 INFO L124 PetriNetUnfolderBase]: 1962/2932 cut-off events. [2024-06-21 17:49:16,152 INFO L125 PetriNetUnfolderBase]: For 38435/38439 co-relation queries the response was YES. [2024-06-21 17:49:16,163 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. [2024-06-21 17:49:16,173 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 133 selfloop transitions, 36 changer transitions 0/172 dead transitions. [2024-06-21 17:49:16,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 172 transitions, 2039 flow [2024-06-21 17:49:16,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:49:16,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:49:16,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-21 17:49:16,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-06-21 17:49:16,175 INFO L175 Difference]: Start difference. First operand has 112 places, 143 transitions, 1509 flow. Second operand 7 states and 114 transitions. [2024-06-21 17:49:16,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 172 transitions, 2039 flow [2024-06-21 17:49:16,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 172 transitions, 1954 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-21 17:49:16,211 INFO L231 Difference]: Finished difference. Result has 116 places, 152 transitions, 1598 flow [2024-06-21 17:49:16,211 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} [2024-06-21 17:49:16,212 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 75 predicate places. [2024-06-21 17:49:16,212 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 152 transitions, 1598 flow [2024-06-21 17:49:16,212 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) [2024-06-21 17:49:16,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:16,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:16,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 17:49:16,213 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)] === [2024-06-21 17:49:16,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:16,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1662270193, now seen corresponding path program 4 times [2024-06-21 17:49:16,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:16,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8686622] [2024-06-21 17:49:16,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:16,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:16,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:16,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:16,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:16,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8686622] [2024-06-21 17:49:16,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8686622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:16,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:16,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:49:16,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260742429] [2024-06-21 17:49:16,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:16,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:49:16,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:16,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:49:16,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:49:16,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:49:16,757 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) [2024-06-21 17:49:16,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:16,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:49:16,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:17,195 INFO L124 PetriNetUnfolderBase]: 1957/2925 cut-off events. [2024-06-21 17:49:17,195 INFO L125 PetriNetUnfolderBase]: For 36663/36667 co-relation queries the response was YES. [2024-06-21 17:49:17,205 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. [2024-06-21 17:49:17,214 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 133 selfloop transitions, 34 changer transitions 0/170 dead transitions. [2024-06-21 17:49:17,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 170 transitions, 1994 flow [2024-06-21 17:49:17,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:49:17,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:49:17,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-21 17:49:17,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2024-06-21 17:49:17,216 INFO L175 Difference]: Start difference. First operand has 116 places, 152 transitions, 1598 flow. Second operand 7 states and 113 transitions. [2024-06-21 17:49:17,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 170 transitions, 1994 flow [2024-06-21 17:49:17,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 170 transitions, 1951 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-21 17:49:17,253 INFO L231 Difference]: Finished difference. Result has 121 places, 152 transitions, 1631 flow [2024-06-21 17:49:17,254 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} [2024-06-21 17:49:17,254 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 80 predicate places. [2024-06-21 17:49:17,254 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 152 transitions, 1631 flow [2024-06-21 17:49:17,254 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) [2024-06-21 17:49:17,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:17,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:17,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 17:49:17,255 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)] === [2024-06-21 17:49:17,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:17,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1662270007, now seen corresponding path program 6 times [2024-06-21 17:49:17,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:17,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261084744] [2024-06-21 17:49:17,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:17,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:17,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:17,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:17,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:17,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261084744] [2024-06-21 17:49:17,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261084744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:17,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:17,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:49:17,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376705391] [2024-06-21 17:49:17,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:17,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:49:17,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:17,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:49:17,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:49:17,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:49:17,843 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) [2024-06-21 17:49:17,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:17,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:49:17,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:18,226 INFO L124 PetriNetUnfolderBase]: 1807/2732 cut-off events. [2024-06-21 17:49:18,226 INFO L125 PetriNetUnfolderBase]: For 41825/41923 co-relation queries the response was YES. [2024-06-21 17:49:18,237 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. [2024-06-21 17:49:18,246 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 92 selfloop transitions, 68 changer transitions 0/177 dead transitions. [2024-06-21 17:49:18,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 177 transitions, 2139 flow [2024-06-21 17:49:18,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:49:18,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:49:18,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-21 17:49:18,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-21 17:49:18,248 INFO L175 Difference]: Start difference. First operand has 121 places, 152 transitions, 1631 flow. Second operand 7 states and 124 transitions. [2024-06-21 17:49:18,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 177 transitions, 2139 flow [2024-06-21 17:49:18,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 177 transitions, 2027 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-21 17:49:18,287 INFO L231 Difference]: Finished difference. Result has 121 places, 155 transitions, 1716 flow [2024-06-21 17:49:18,288 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} [2024-06-21 17:49:18,288 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 80 predicate places. [2024-06-21 17:49:18,288 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 155 transitions, 1716 flow [2024-06-21 17:49:18,288 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) [2024-06-21 17:49:18,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:18,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:18,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 17:49:18,289 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)] === [2024-06-21 17:49:18,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:18,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1662516271, now seen corresponding path program 1 times [2024-06-21 17:49:18,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:18,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229303759] [2024-06-21 17:49:18,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:18,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:18,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:19,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:19,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:19,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229303759] [2024-06-21 17:49:19,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229303759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:19,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:19,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:49:19,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014134113] [2024-06-21 17:49:19,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:19,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:49:19,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:19,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:49:19,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:49:19,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:49:19,231 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) [2024-06-21 17:49:19,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:19,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:49:19,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:19,698 INFO L124 PetriNetUnfolderBase]: 1886/2844 cut-off events. [2024-06-21 17:49:19,698 INFO L125 PetriNetUnfolderBase]: For 47923/48120 co-relation queries the response was YES. [2024-06-21 17:49:19,708 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. [2024-06-21 17:49:19,717 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 136 selfloop transitions, 17 changer transitions 0/180 dead transitions. [2024-06-21 17:49:19,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 180 transitions, 2116 flow [2024-06-21 17:49:19,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:49:19,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:49:19,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-21 17:49:19,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-21 17:49:19,719 INFO L175 Difference]: Start difference. First operand has 121 places, 155 transitions, 1716 flow. Second operand 8 states and 130 transitions. [2024-06-21 17:49:19,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 180 transitions, 2116 flow [2024-06-21 17:49:19,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 180 transitions, 1945 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 17:49:19,762 INFO L231 Difference]: Finished difference. Result has 124 places, 157 transitions, 1606 flow [2024-06-21 17:49:19,762 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} [2024-06-21 17:49:19,763 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 83 predicate places. [2024-06-21 17:49:19,763 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 157 transitions, 1606 flow [2024-06-21 17:49:19,763 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) [2024-06-21 17:49:19,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:19,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:19,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 17:49:19,763 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)] === [2024-06-21 17:49:19,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:19,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1785116638, now seen corresponding path program 1 times [2024-06-21 17:49:19,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:19,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858912276] [2024-06-21 17:49:19,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:19,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:19,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:20,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:20,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:20,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858912276] [2024-06-21 17:49:20,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858912276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:20,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:20,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:49:20,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052688712] [2024-06-21 17:49:20,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:20,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:49:20,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:20,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:49:20,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:49:20,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:49:20,529 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) [2024-06-21 17:49:20,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:20,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:49:20,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:21,069 INFO L124 PetriNetUnfolderBase]: 1798/2723 cut-off events. [2024-06-21 17:49:21,069 INFO L125 PetriNetUnfolderBase]: For 49506/49676 co-relation queries the response was YES. [2024-06-21 17:49:21,079 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. [2024-06-21 17:49:21,087 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 123 selfloop transitions, 50 changer transitions 0/191 dead transitions. [2024-06-21 17:49:21,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 191 transitions, 2129 flow [2024-06-21 17:49:21,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:49:21,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:49:21,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 17:49:21,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 17:49:21,089 INFO L175 Difference]: Start difference. First operand has 124 places, 157 transitions, 1606 flow. Second operand 8 states and 140 transitions. [2024-06-21 17:49:21,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 191 transitions, 2129 flow [2024-06-21 17:49:21,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 191 transitions, 2086 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 17:49:21,127 INFO L231 Difference]: Finished difference. Result has 127 places, 164 transitions, 1792 flow [2024-06-21 17:49:21,127 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} [2024-06-21 17:49:21,128 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 86 predicate places. [2024-06-21 17:49:21,128 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 164 transitions, 1792 flow [2024-06-21 17:49:21,128 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) [2024-06-21 17:49:21,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:21,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:21,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 17:49:21,128 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)] === [2024-06-21 17:49:21,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:21,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1376496025, now seen corresponding path program 1 times [2024-06-21 17:49:21,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:21,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539454376] [2024-06-21 17:49:21,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:21,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:21,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:21,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:21,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:21,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539454376] [2024-06-21 17:49:21,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539454376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:21,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:21,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:49:21,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866103974] [2024-06-21 17:49:21,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:21,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:49:21,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:21,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:49:21,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:49:21,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:49:21,740 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) [2024-06-21 17:49:21,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:21,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:49:21,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:22,231 INFO L124 PetriNetUnfolderBase]: 1988/2962 cut-off events. [2024-06-21 17:49:22,232 INFO L125 PetriNetUnfolderBase]: For 49650/49652 co-relation queries the response was YES. [2024-06-21 17:49:22,244 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. [2024-06-21 17:49:22,254 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 178 selfloop transitions, 40 changer transitions 0/221 dead transitions. [2024-06-21 17:49:22,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 221 transitions, 2658 flow [2024-06-21 17:49:22,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:49:22,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:49:22,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-21 17:49:22,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-06-21 17:49:22,255 INFO L175 Difference]: Start difference. First operand has 127 places, 164 transitions, 1792 flow. Second operand 9 states and 147 transitions. [2024-06-21 17:49:22,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 221 transitions, 2658 flow [2024-06-21 17:49:22,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 221 transitions, 2541 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 17:49:22,300 INFO L231 Difference]: Finished difference. Result has 135 places, 189 transitions, 2158 flow [2024-06-21 17:49:22,301 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} [2024-06-21 17:49:22,301 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 94 predicate places. [2024-06-21 17:49:22,301 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 189 transitions, 2158 flow [2024-06-21 17:49:22,301 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) [2024-06-21 17:49:22,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:22,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:22,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 17:49:22,302 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)] === [2024-06-21 17:49:22,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:22,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1077371332, now seen corresponding path program 2 times [2024-06-21 17:49:22,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:22,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368725299] [2024-06-21 17:49:22,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:22,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:22,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:23,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:23,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:23,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368725299] [2024-06-21 17:49:23,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368725299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:23,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:23,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:49:23,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171146637] [2024-06-21 17:49:23,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:23,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:49:23,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:23,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:49:23,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:49:23,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:49:23,110 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) [2024-06-21 17:49:23,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:23,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:49:23,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:23,637 INFO L124 PetriNetUnfolderBase]: 1877/2835 cut-off events. [2024-06-21 17:49:23,638 INFO L125 PetriNetUnfolderBase]: For 59018/59117 co-relation queries the response was YES. [2024-06-21 17:49:23,650 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. [2024-06-21 17:49:23,663 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 131 selfloop transitions, 68 changer transitions 0/222 dead transitions. [2024-06-21 17:49:23,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 222 transitions, 2750 flow [2024-06-21 17:49:23,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:49:23,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:49:23,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 17:49:23,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440625 [2024-06-21 17:49:23,664 INFO L175 Difference]: Start difference. First operand has 135 places, 189 transitions, 2158 flow. Second operand 8 states and 141 transitions. [2024-06-21 17:49:23,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 222 transitions, 2750 flow [2024-06-21 17:49:23,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 222 transitions, 2687 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-21 17:49:23,727 INFO L231 Difference]: Finished difference. Result has 141 places, 197 transitions, 2367 flow [2024-06-21 17:49:23,728 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} [2024-06-21 17:49:23,728 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 100 predicate places. [2024-06-21 17:49:23,728 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 197 transitions, 2367 flow [2024-06-21 17:49:23,728 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) [2024-06-21 17:49:23,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:23,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:23,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 17:49:23,729 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)] === [2024-06-21 17:49:23,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:23,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1359672173, now seen corresponding path program 2 times [2024-06-21 17:49:23,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:23,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122525896] [2024-06-21 17:49:23,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:23,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:23,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:24,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:24,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:24,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122525896] [2024-06-21 17:49:24,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122525896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:24,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:24,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:49:24,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919278197] [2024-06-21 17:49:24,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:24,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:49:24,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:24,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:49:24,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:49:24,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:49:24,323 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) [2024-06-21 17:49:24,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:24,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:49:24,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:24,931 INFO L124 PetriNetUnfolderBase]: 2040/3037 cut-off events. [2024-06-21 17:49:24,932 INFO L125 PetriNetUnfolderBase]: For 59598/59604 co-relation queries the response was YES. [2024-06-21 17:49:24,945 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. [2024-06-21 17:49:24,955 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 188 selfloop transitions, 49 changer transitions 0/240 dead transitions. [2024-06-21 17:49:24,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 240 transitions, 3068 flow [2024-06-21 17:49:24,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:49:24,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:49:24,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-21 17:49:24,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4111111111111111 [2024-06-21 17:49:24,957 INFO L175 Difference]: Start difference. First operand has 141 places, 197 transitions, 2367 flow. Second operand 9 states and 148 transitions. [2024-06-21 17:49:24,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 240 transitions, 3068 flow [2024-06-21 17:49:25,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 240 transitions, 2983 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 17:49:25,011 INFO L231 Difference]: Finished difference. Result has 147 places, 210 transitions, 2533 flow [2024-06-21 17:49:25,011 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} [2024-06-21 17:49:25,011 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 106 predicate places. [2024-06-21 17:49:25,011 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 210 transitions, 2533 flow [2024-06-21 17:49:25,012 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) [2024-06-21 17:49:25,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:25,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:25,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 17:49:25,012 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)] === [2024-06-21 17:49:25,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:25,012 INFO L85 PathProgramCache]: Analyzing trace with hash -993126197, now seen corresponding path program 3 times [2024-06-21 17:49:25,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:25,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145413971] [2024-06-21 17:49:25,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:25,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:25,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:25,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:25,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:25,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145413971] [2024-06-21 17:49:25,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145413971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:25,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:25,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:49:25,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600468234] [2024-06-21 17:49:25,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:25,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:49:25,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:25,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:49:25,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:49:25,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:49:25,605 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) [2024-06-21 17:49:25,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:25,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:49:25,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:26,155 INFO L124 PetriNetUnfolderBase]: 2190/3254 cut-off events. [2024-06-21 17:49:26,156 INFO L125 PetriNetUnfolderBase]: For 70608/70610 co-relation queries the response was YES. [2024-06-21 17:49:26,171 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. [2024-06-21 17:49:26,183 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 196 selfloop transitions, 66 changer transitions 0/265 dead transitions. [2024-06-21 17:49:26,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 265 transitions, 3613 flow [2024-06-21 17:49:26,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:49:26,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:49:26,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 17:49:26,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4361111111111111 [2024-06-21 17:49:26,185 INFO L175 Difference]: Start difference. First operand has 147 places, 210 transitions, 2533 flow. Second operand 9 states and 157 transitions. [2024-06-21 17:49:26,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 265 transitions, 3613 flow [2024-06-21 17:49:26,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 265 transitions, 3576 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-21 17:49:26,275 INFO L231 Difference]: Finished difference. Result has 156 places, 226 transitions, 2892 flow [2024-06-21 17:49:26,275 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} [2024-06-21 17:49:26,275 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 115 predicate places. [2024-06-21 17:49:26,276 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 226 transitions, 2892 flow [2024-06-21 17:49:26,276 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) [2024-06-21 17:49:26,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:26,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:26,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 17:49:26,276 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)] === [2024-06-21 17:49:26,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:26,277 INFO L85 PathProgramCache]: Analyzing trace with hash -993120400, now seen corresponding path program 1 times [2024-06-21 17:49:26,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:26,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006599734] [2024-06-21 17:49:26,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:26,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:26,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:27,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:27,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:27,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006599734] [2024-06-21 17:49:27,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006599734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:27,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:27,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:49:27,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361858037] [2024-06-21 17:49:27,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:27,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:49:27,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:27,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:49:27,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:49:27,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:49:27,105 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) [2024-06-21 17:49:27,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:27,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:49:27,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:27,708 INFO L124 PetriNetUnfolderBase]: 2185/3253 cut-off events. [2024-06-21 17:49:27,708 INFO L125 PetriNetUnfolderBase]: For 78699/78703 co-relation queries the response was YES. [2024-06-21 17:49:27,722 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. [2024-06-21 17:49:27,734 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 230 selfloop transitions, 23 changer transitions 0/256 dead transitions. [2024-06-21 17:49:27,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 256 transitions, 3524 flow [2024-06-21 17:49:27,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:49:27,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:49:27,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-21 17:49:27,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39166666666666666 [2024-06-21 17:49:27,735 INFO L175 Difference]: Start difference. First operand has 156 places, 226 transitions, 2892 flow. Second operand 9 states and 141 transitions. [2024-06-21 17:49:27,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 256 transitions, 3524 flow [2024-06-21 17:49:27,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 256 transitions, 3433 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-21 17:49:27,828 INFO L231 Difference]: Finished difference. Result has 161 places, 228 transitions, 2881 flow [2024-06-21 17:49:27,828 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} [2024-06-21 17:49:27,829 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 120 predicate places. [2024-06-21 17:49:27,829 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 228 transitions, 2881 flow [2024-06-21 17:49:27,829 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) [2024-06-21 17:49:27,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:27,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:27,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 17:49:27,829 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)] === [2024-06-21 17:49:27,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:27,830 INFO L85 PathProgramCache]: Analyzing trace with hash -2018228927, now seen corresponding path program 4 times [2024-06-21 17:49:27,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:27,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535328419] [2024-06-21 17:49:27,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:27,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:27,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:28,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:28,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:28,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535328419] [2024-06-21 17:49:28,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535328419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:28,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:28,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:49:28,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174863328] [2024-06-21 17:49:28,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:28,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:49:28,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:28,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:49:28,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:49:28,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:49:28,414 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) [2024-06-21 17:49:28,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:28,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:49:28,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:29,044 INFO L124 PetriNetUnfolderBase]: 2165/3219 cut-off events. [2024-06-21 17:49:29,045 INFO L125 PetriNetUnfolderBase]: For 81225/81227 co-relation queries the response was YES. [2024-06-21 17:49:29,060 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. [2024-06-21 17:49:29,071 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 189 selfloop transitions, 75 changer transitions 0/267 dead transitions. [2024-06-21 17:49:29,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 267 transitions, 3718 flow [2024-06-21 17:49:29,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:49:29,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:49:29,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 17:49:29,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-06-21 17:49:29,073 INFO L175 Difference]: Start difference. First operand has 161 places, 228 transitions, 2881 flow. Second operand 9 states and 154 transitions. [2024-06-21 17:49:29,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 267 transitions, 3718 flow [2024-06-21 17:49:29,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 267 transitions, 3622 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-21 17:49:29,165 INFO L231 Difference]: Finished difference. Result has 164 places, 233 transitions, 3050 flow [2024-06-21 17:49:29,165 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} [2024-06-21 17:49:29,166 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 123 predicate places. [2024-06-21 17:49:29,166 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 233 transitions, 3050 flow [2024-06-21 17:49:29,166 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) [2024-06-21 17:49:29,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:29,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:29,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 17:49:29,166 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)] === [2024-06-21 17:49:29,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:29,167 INFO L85 PathProgramCache]: Analyzing trace with hash -775601908, now seen corresponding path program 3 times [2024-06-21 17:49:29,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:29,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379646448] [2024-06-21 17:49:29,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:29,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:29,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:29,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:29,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:29,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379646448] [2024-06-21 17:49:29,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379646448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:29,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:29,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:49:29,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714961737] [2024-06-21 17:49:29,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:29,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:49:29,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:29,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:49:29,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:49:30,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:49:30,027 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) [2024-06-21 17:49:30,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:30,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:49:30,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:30,683 INFO L124 PetriNetUnfolderBase]: 2183/3264 cut-off events. [2024-06-21 17:49:30,683 INFO L125 PetriNetUnfolderBase]: For 95334/95480 co-relation queries the response was YES. [2024-06-21 17:49:30,699 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. [2024-06-21 17:49:30,712 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 165 selfloop transitions, 99 changer transitions 0/300 dead transitions. [2024-06-21 17:49:30,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 300 transitions, 4507 flow [2024-06-21 17:49:30,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:49:30,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:49:30,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 17:49:30,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-06-21 17:49:30,713 INFO L175 Difference]: Start difference. First operand has 164 places, 233 transitions, 3050 flow. Second operand 8 states and 134 transitions. [2024-06-21 17:49:30,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 300 transitions, 4507 flow [2024-06-21 17:49:30,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 300 transitions, 4381 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 17:49:30,834 INFO L231 Difference]: Finished difference. Result has 168 places, 276 transitions, 4026 flow [2024-06-21 17:49:30,835 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} [2024-06-21 17:49:30,835 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 127 predicate places. [2024-06-21 17:49:30,835 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 276 transitions, 4026 flow [2024-06-21 17:49:30,835 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) [2024-06-21 17:49:30,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:30,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:30,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 17:49:30,836 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)] === [2024-06-21 17:49:30,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:30,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1504326731, now seen corresponding path program 5 times [2024-06-21 17:49:30,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:30,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755116924] [2024-06-21 17:49:30,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:30,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:30,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:31,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:31,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:31,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755116924] [2024-06-21 17:49:31,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755116924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:31,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:31,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:49:31,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134394261] [2024-06-21 17:49:31,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:31,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:49:31,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:31,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:49:31,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:49:31,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:49:31,412 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) [2024-06-21 17:49:31,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:31,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:49:31,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:32,053 INFO L124 PetriNetUnfolderBase]: 2311/3430 cut-off events. [2024-06-21 17:49:32,054 INFO L125 PetriNetUnfolderBase]: For 95926/95932 co-relation queries the response was YES. [2024-06-21 17:49:32,073 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. [2024-06-21 17:49:32,088 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 235 selfloop transitions, 72 changer transitions 0/310 dead transitions. [2024-06-21 17:49:32,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 310 transitions, 4836 flow [2024-06-21 17:49:32,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:49:32,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:49:32,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 17:49:32,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-21 17:49:32,089 INFO L175 Difference]: Start difference. First operand has 168 places, 276 transitions, 4026 flow. Second operand 8 states and 132 transitions. [2024-06-21 17:49:32,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 310 transitions, 4836 flow [2024-06-21 17:49:32,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 310 transitions, 4652 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 17:49:32,218 INFO L231 Difference]: Finished difference. Result has 174 places, 282 transitions, 4126 flow [2024-06-21 17:49:32,218 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} [2024-06-21 17:49:32,219 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 133 predicate places. [2024-06-21 17:49:32,219 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 282 transitions, 4126 flow [2024-06-21 17:49:32,219 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) [2024-06-21 17:49:32,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:32,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:32,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 17:49:32,220 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)] === [2024-06-21 17:49:32,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:32,220 INFO L85 PathProgramCache]: Analyzing trace with hash 988308522, now seen corresponding path program 2 times [2024-06-21 17:49:32,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:32,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233992938] [2024-06-21 17:49:32,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:32,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:32,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:32,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:32,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:32,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233992938] [2024-06-21 17:49:32,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233992938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:32,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:32,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:49:32,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515944354] [2024-06-21 17:49:32,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:32,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:49:32,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:32,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:49:32,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:49:33,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:49:33,081 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) [2024-06-21 17:49:33,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:33,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:49:33,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:33,689 INFO L124 PetriNetUnfolderBase]: 2322/3452 cut-off events. [2024-06-21 17:49:33,690 INFO L125 PetriNetUnfolderBase]: For 103929/103933 co-relation queries the response was YES. [2024-06-21 17:49:33,709 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. [2024-06-21 17:49:33,724 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 273 selfloop transitions, 33 changer transitions 0/309 dead transitions. [2024-06-21 17:49:33,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 309 transitions, 4862 flow [2024-06-21 17:49:33,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:49:33,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:49:33,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-21 17:49:33,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39375 [2024-06-21 17:49:33,726 INFO L175 Difference]: Start difference. First operand has 174 places, 282 transitions, 4126 flow. Second operand 8 states and 126 transitions. [2024-06-21 17:49:33,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 309 transitions, 4862 flow [2024-06-21 17:49:33,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 309 transitions, 4773 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-21 17:49:33,903 INFO L231 Difference]: Finished difference. Result has 178 places, 285 transitions, 4153 flow [2024-06-21 17:49:33,903 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} [2024-06-21 17:49:33,904 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 137 predicate places. [2024-06-21 17:49:33,904 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 285 transitions, 4153 flow [2024-06-21 17:49:33,904 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) [2024-06-21 17:49:33,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:33,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:33,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 17:49:33,905 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)] === [2024-06-21 17:49:33,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:33,906 INFO L85 PathProgramCache]: Analyzing trace with hash -771878963, now seen corresponding path program 6 times [2024-06-21 17:49:33,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:33,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89283443] [2024-06-21 17:49:33,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:33,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:33,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:34,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:34,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:34,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89283443] [2024-06-21 17:49:34,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89283443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:34,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:34,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:49:34,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273182006] [2024-06-21 17:49:34,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:34,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:49:34,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:34,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:49:34,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:49:34,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:49:34,581 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) [2024-06-21 17:49:34,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:34,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:49:34,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:35,213 INFO L124 PetriNetUnfolderBase]: 2456/3639 cut-off events. [2024-06-21 17:49:35,213 INFO L125 PetriNetUnfolderBase]: For 116616/116618 co-relation queries the response was YES. [2024-06-21 17:49:35,233 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. [2024-06-21 17:49:35,249 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 228 selfloop transitions, 100 changer transitions 0/331 dead transitions. [2024-06-21 17:49:35,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 331 transitions, 5369 flow [2024-06-21 17:49:35,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:49:35,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:49:35,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 17:49:35,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 17:49:35,251 INFO L175 Difference]: Start difference. First operand has 178 places, 285 transitions, 4153 flow. Second operand 8 states and 140 transitions. [2024-06-21 17:49:35,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 331 transitions, 5369 flow [2024-06-21 17:49:35,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 331 transitions, 5291 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 17:49:35,434 INFO L231 Difference]: Finished difference. Result has 182 places, 298 transitions, 4573 flow [2024-06-21 17:49:35,435 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} [2024-06-21 17:49:35,435 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 141 predicate places. [2024-06-21 17:49:35,435 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 298 transitions, 4573 flow [2024-06-21 17:49:35,435 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) [2024-06-21 17:49:35,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:35,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:35,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 17:49:35,436 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)] === [2024-06-21 17:49:35,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:35,436 INFO L85 PathProgramCache]: Analyzing trace with hash 988308305, now seen corresponding path program 7 times [2024-06-21 17:49:35,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:35,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29532648] [2024-06-21 17:49:35,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:35,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:35,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:35,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:35,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:35,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29532648] [2024-06-21 17:49:35,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29532648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:35,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:35,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:49:35,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812341569] [2024-06-21 17:49:35,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:35,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:49:35,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:35,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:49:35,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:49:36,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:49:36,055 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) [2024-06-21 17:49:36,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:36,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:49:36,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:36,660 INFO L124 PetriNetUnfolderBase]: 2436/3611 cut-off events. [2024-06-21 17:49:36,660 INFO L125 PetriNetUnfolderBase]: For 127643/127645 co-relation queries the response was YES. [2024-06-21 17:49:36,679 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. [2024-06-21 17:49:36,694 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 216 selfloop transitions, 112 changer transitions 0/331 dead transitions. [2024-06-21 17:49:36,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 331 transitions, 5528 flow [2024-06-21 17:49:36,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:49:36,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:49:36,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 17:49:36,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428125 [2024-06-21 17:49:36,696 INFO L175 Difference]: Start difference. First operand has 182 places, 298 transitions, 4573 flow. Second operand 8 states and 137 transitions. [2024-06-21 17:49:36,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 331 transitions, 5528 flow [2024-06-21 17:49:36,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 331 transitions, 5385 flow, removed 52 selfloop flow, removed 3 redundant places. [2024-06-21 17:49:36,988 INFO L231 Difference]: Finished difference. Result has 188 places, 301 transitions, 4774 flow [2024-06-21 17:49:36,989 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} [2024-06-21 17:49:36,989 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 147 predicate places. [2024-06-21 17:49:36,989 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 301 transitions, 4774 flow [2024-06-21 17:49:36,989 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) [2024-06-21 17:49:36,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:36,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:36,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 17:49:36,990 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)] === [2024-06-21 17:49:36,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:36,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1612188, now seen corresponding path program 3 times [2024-06-21 17:49:36,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:36,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885655973] [2024-06-21 17:49:36,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:36,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:36,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:37,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:37,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:37,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885655973] [2024-06-21 17:49:37,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885655973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:37,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:37,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:49:37,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818659418] [2024-06-21 17:49:37,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:37,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:49:37,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:37,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:49:37,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:49:37,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:49:37,539 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) [2024-06-21 17:49:37,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:37,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:49:37,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:38,225 INFO L124 PetriNetUnfolderBase]: 2479/3676 cut-off events. [2024-06-21 17:49:38,225 INFO L125 PetriNetUnfolderBase]: For 131723/131725 co-relation queries the response was YES. [2024-06-21 17:49:38,245 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. [2024-06-21 17:49:38,259 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 204 selfloop transitions, 144 changer transitions 0/351 dead transitions. [2024-06-21 17:49:38,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 351 transitions, 6134 flow [2024-06-21 17:49:38,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:49:38,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:49:38,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 17:49:38,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434375 [2024-06-21 17:49:38,261 INFO L175 Difference]: Start difference. First operand has 188 places, 301 transitions, 4774 flow. Second operand 8 states and 139 transitions. [2024-06-21 17:49:38,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 351 transitions, 6134 flow [2024-06-21 17:49:38,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 351 transitions, 5965 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 17:49:38,459 INFO L231 Difference]: Finished difference. Result has 193 places, 322 transitions, 5374 flow [2024-06-21 17:49:38,459 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} [2024-06-21 17:49:38,460 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 152 predicate places. [2024-06-21 17:49:38,460 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 322 transitions, 5374 flow [2024-06-21 17:49:38,460 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) [2024-06-21 17:49:38,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:38,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:38,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 17:49:38,460 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)] === [2024-06-21 17:49:38,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:38,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1879098, now seen corresponding path program 4 times [2024-06-21 17:49:38,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:38,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575399216] [2024-06-21 17:49:38,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:38,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:38,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:39,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:39,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:39,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575399216] [2024-06-21 17:49:39,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575399216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:39,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:39,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:49:39,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067001533] [2024-06-21 17:49:39,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:39,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:49:39,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:39,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:49:39,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:49:39,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:49:39,242 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) [2024-06-21 17:49:39,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:39,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:49:39,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:40,091 INFO L124 PetriNetUnfolderBase]: 2550/3781 cut-off events. [2024-06-21 17:49:40,091 INFO L125 PetriNetUnfolderBase]: For 134948/134950 co-relation queries the response was YES. [2024-06-21 17:49:40,115 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. [2024-06-21 17:49:40,135 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 226 selfloop transitions, 130 changer transitions 0/359 dead transitions. [2024-06-21 17:49:40,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 359 transitions, 6565 flow [2024-06-21 17:49:40,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:49:40,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:49:40,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 17:49:40,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 17:49:40,137 INFO L175 Difference]: Start difference. First operand has 193 places, 322 transitions, 5374 flow. Second operand 8 states and 140 transitions. [2024-06-21 17:49:40,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 359 transitions, 6565 flow [2024-06-21 17:49:40,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 359 transitions, 6468 flow, removed 31 selfloop flow, removed 2 redundant places. [2024-06-21 17:49:40,387 INFO L231 Difference]: Finished difference. Result has 199 places, 329 transitions, 5684 flow [2024-06-21 17:49:40,387 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} [2024-06-21 17:49:40,387 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 158 predicate places. [2024-06-21 17:49:40,388 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 329 transitions, 5684 flow [2024-06-21 17:49:40,388 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) [2024-06-21 17:49:40,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:40,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:40,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 17:49:40,388 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)] === [2024-06-21 17:49:40,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:40,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1583454441, now seen corresponding path program 8 times [2024-06-21 17:49:40,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:40,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886431481] [2024-06-21 17:49:40,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:40,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:40,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:40,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:40,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:40,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886431481] [2024-06-21 17:49:40,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886431481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:40,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:40,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:49:40,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386129462] [2024-06-21 17:49:40,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:40,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:49:40,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:40,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:49:40,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:49:41,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:49:41,016 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) [2024-06-21 17:49:41,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:41,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:49:41,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:41,803 INFO L124 PetriNetUnfolderBase]: 2556/3789 cut-off events. [2024-06-21 17:49:41,803 INFO L125 PetriNetUnfolderBase]: For 142760/142762 co-relation queries the response was YES. [2024-06-21 17:49:41,825 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. [2024-06-21 17:49:41,841 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 212 selfloop transitions, 148 changer transitions 0/363 dead transitions. [2024-06-21 17:49:41,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 363 transitions, 6734 flow [2024-06-21 17:49:41,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:49:41,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:49:41,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 17:49:41,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 17:49:41,843 INFO L175 Difference]: Start difference. First operand has 199 places, 329 transitions, 5684 flow. Second operand 8 states and 140 transitions. [2024-06-21 17:49:41,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 363 transitions, 6734 flow [2024-06-21 17:49:42,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 363 transitions, 6396 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-21 17:49:42,089 INFO L231 Difference]: Finished difference. Result has 202 places, 335 transitions, 5757 flow [2024-06-21 17:49:42,090 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} [2024-06-21 17:49:42,090 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 161 predicate places. [2024-06-21 17:49:42,090 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 335 transitions, 5757 flow [2024-06-21 17:49:42,090 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) [2024-06-21 17:49:42,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:42,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:42,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 17:49:42,091 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)] === [2024-06-21 17:49:42,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:42,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1590811671, now seen corresponding path program 9 times [2024-06-21 17:49:42,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:42,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585890530] [2024-06-21 17:49:42,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:42,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:42,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:42,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:42,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:42,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585890530] [2024-06-21 17:49:42,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585890530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:42,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:42,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:49:42,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962100800] [2024-06-21 17:49:42,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:42,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:49:42,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:42,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:49:42,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:49:42,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:49:42,711 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) [2024-06-21 17:49:42,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:42,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:49:42,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:43,484 INFO L124 PetriNetUnfolderBase]: 2578/3821 cut-off events. [2024-06-21 17:49:43,485 INFO L125 PetriNetUnfolderBase]: For 149336/149338 co-relation queries the response was YES. [2024-06-21 17:49:43,505 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. [2024-06-21 17:49:43,522 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 230 selfloop transitions, 138 changer transitions 0/371 dead transitions. [2024-06-21 17:49:43,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 371 transitions, 7075 flow [2024-06-21 17:49:43,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:49:43,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:49:43,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 17:49:43,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-06-21 17:49:43,523 INFO L175 Difference]: Start difference. First operand has 202 places, 335 transitions, 5757 flow. Second operand 8 states and 145 transitions. [2024-06-21 17:49:43,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 371 transitions, 7075 flow [2024-06-21 17:49:43,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 371 transitions, 6917 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-21 17:49:43,766 INFO L231 Difference]: Finished difference. Result has 206 places, 339 transitions, 5973 flow [2024-06-21 17:49:43,766 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} [2024-06-21 17:49:43,766 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 165 predicate places. [2024-06-21 17:49:43,766 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 339 transitions, 5973 flow [2024-06-21 17:49:43,767 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) [2024-06-21 17:49:43,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:43,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:43,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 17:49:43,767 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)] === [2024-06-21 17:49:43,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:43,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1590806091, now seen corresponding path program 10 times [2024-06-21 17:49:43,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:43,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857293005] [2024-06-21 17:49:43,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:43,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:43,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:44,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:44,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:44,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857293005] [2024-06-21 17:49:44,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857293005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:44,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:44,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:49:44,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848575660] [2024-06-21 17:49:44,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:44,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:49:44,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:44,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:49:44,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:49:44,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:49:44,412 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) [2024-06-21 17:49:44,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:44,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:49:44,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:45,122 INFO L124 PetriNetUnfolderBase]: 2564/3803 cut-off events. [2024-06-21 17:49:45,123 INFO L125 PetriNetUnfolderBase]: For 153380/153382 co-relation queries the response was YES. [2024-06-21 17:49:45,147 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. [2024-06-21 17:49:45,165 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 233 selfloop transitions, 133 changer transitions 0/369 dead transitions. [2024-06-21 17:49:45,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 369 transitions, 7079 flow [2024-06-21 17:49:45,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:49:45,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:49:45,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 17:49:45,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 17:49:45,167 INFO L175 Difference]: Start difference. First operand has 206 places, 339 transitions, 5973 flow. Second operand 8 states and 144 transitions. [2024-06-21 17:49:45,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 369 transitions, 7079 flow [2024-06-21 17:49:45,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 369 transitions, 6722 flow, removed 67 selfloop flow, removed 4 redundant places. [2024-06-21 17:49:45,540 INFO L231 Difference]: Finished difference. Result has 210 places, 339 transitions, 5894 flow [2024-06-21 17:49:45,540 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} [2024-06-21 17:49:45,540 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 169 predicate places. [2024-06-21 17:49:45,540 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 339 transitions, 5894 flow [2024-06-21 17:49:45,541 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) [2024-06-21 17:49:45,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:45,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:45,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 17:49:45,541 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)] === [2024-06-21 17:49:45,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:45,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1590805874, now seen corresponding path program 5 times [2024-06-21 17:49:45,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:45,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945011654] [2024-06-21 17:49:45,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:45,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:45,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:46,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:46,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:46,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945011654] [2024-06-21 17:49:46,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945011654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:46,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:46,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:49:46,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222172265] [2024-06-21 17:49:46,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:46,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:49:46,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:46,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:49:46,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:49:46,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:49:46,269 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) [2024-06-21 17:49:46,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:46,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:49:46,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:47,055 INFO L124 PetriNetUnfolderBase]: 2543/3772 cut-off events. [2024-06-21 17:49:47,056 INFO L125 PetriNetUnfolderBase]: For 157003/157005 co-relation queries the response was YES. [2024-06-21 17:49:47,080 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. [2024-06-21 17:49:47,097 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 246 selfloop transitions, 118 changer transitions 0/367 dead transitions. [2024-06-21 17:49:47,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 367 transitions, 6868 flow [2024-06-21 17:49:47,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:49:47,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:49:47,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 17:49:47,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434375 [2024-06-21 17:49:47,100 INFO L175 Difference]: Start difference. First operand has 210 places, 339 transitions, 5894 flow. Second operand 8 states and 139 transitions. [2024-06-21 17:49:47,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 367 transitions, 6868 flow [2024-06-21 17:49:47,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 367 transitions, 6519 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 17:49:47,512 INFO L231 Difference]: Finished difference. Result has 213 places, 339 transitions, 5792 flow [2024-06-21 17:49:47,512 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} [2024-06-21 17:49:47,512 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 172 predicate places. [2024-06-21 17:49:47,513 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 339 transitions, 5792 flow [2024-06-21 17:49:47,513 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) [2024-06-21 17:49:47,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:47,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:47,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 17:49:47,513 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)] === [2024-06-21 17:49:47,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:47,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1217278712, now seen corresponding path program 1 times [2024-06-21 17:49:47,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:47,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644144436] [2024-06-21 17:49:47,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:47,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:47,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:48,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:48,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:48,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644144436] [2024-06-21 17:49:48,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644144436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:48,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:48,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:49:48,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438373883] [2024-06-21 17:49:48,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:48,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:49:48,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:48,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:49:48,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:49:48,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:49:48,301 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) [2024-06-21 17:49:48,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:48,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:49:48,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:49,025 INFO L124 PetriNetUnfolderBase]: 2499/3735 cut-off events. [2024-06-21 17:49:49,026 INFO L125 PetriNetUnfolderBase]: For 176567/176706 co-relation queries the response was YES. [2024-06-21 17:49:49,051 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. [2024-06-21 17:49:49,070 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 236 selfloop transitions, 83 changer transitions 0/376 dead transitions. [2024-06-21 17:49:49,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 376 transitions, 6594 flow [2024-06-21 17:49:49,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:49:49,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:49:49,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 17:49:49,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-06-21 17:49:49,072 INFO L175 Difference]: Start difference. First operand has 213 places, 339 transitions, 5792 flow. Second operand 9 states and 155 transitions. [2024-06-21 17:49:49,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 376 transitions, 6594 flow [2024-06-21 17:49:49,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 376 transitions, 6410 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 17:49:49,476 INFO L231 Difference]: Finished difference. Result has 217 places, 343 transitions, 5843 flow [2024-06-21 17:49:49,477 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} [2024-06-21 17:49:49,477 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 176 predicate places. [2024-06-21 17:49:49,477 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 343 transitions, 5843 flow [2024-06-21 17:49:49,477 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) [2024-06-21 17:49:49,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:49,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:49,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 17:49:49,478 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)] === [2024-06-21 17:49:49,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:49,478 INFO L85 PathProgramCache]: Analyzing trace with hash 800202284, now seen corresponding path program 2 times [2024-06-21 17:49:49,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:49,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088472320] [2024-06-21 17:49:49,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:49,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:49,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:50,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:50,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:50,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088472320] [2024-06-21 17:49:50,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088472320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:50,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:50,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:49:50,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220718792] [2024-06-21 17:49:50,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:50,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:49:50,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:50,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:49:50,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:49:50,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:49:50,360 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) [2024-06-21 17:49:50,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:50,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:49:50,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:51,219 INFO L124 PetriNetUnfolderBase]: 2547/3823 cut-off events. [2024-06-21 17:49:51,219 INFO L125 PetriNetUnfolderBase]: For 189414/189499 co-relation queries the response was YES. [2024-06-21 17:49:51,246 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. [2024-06-21 17:49:51,265 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 241 selfloop transitions, 87 changer transitions 0/385 dead transitions. [2024-06-21 17:49:51,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 385 transitions, 6736 flow [2024-06-21 17:49:51,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:49:51,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:49:51,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 17:49:51,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 17:49:51,266 INFO L175 Difference]: Start difference. First operand has 217 places, 343 transitions, 5843 flow. Second operand 9 states and 153 transitions. [2024-06-21 17:49:51,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 385 transitions, 6736 flow [2024-06-21 17:49:51,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 385 transitions, 6425 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-21 17:49:51,624 INFO L231 Difference]: Finished difference. Result has 220 places, 352 transitions, 5866 flow [2024-06-21 17:49:51,625 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} [2024-06-21 17:49:51,625 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 179 predicate places. [2024-06-21 17:49:51,625 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 352 transitions, 5866 flow [2024-06-21 17:49:51,625 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) [2024-06-21 17:49:51,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:51,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:51,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 17:49:51,626 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)] === [2024-06-21 17:49:51,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:51,626 INFO L85 PathProgramCache]: Analyzing trace with hash -495958404, now seen corresponding path program 3 times [2024-06-21 17:49:51,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:51,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080151015] [2024-06-21 17:49:51,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:51,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:51,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:52,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:52,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:52,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080151015] [2024-06-21 17:49:52,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080151015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:52,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:52,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:49:52,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963502818] [2024-06-21 17:49:52,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:52,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:49:52,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:52,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:49:52,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:49:52,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:49:52,521 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) [2024-06-21 17:49:52,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:52,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:49:52,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:53,323 INFO L124 PetriNetUnfolderBase]: 2555/3849 cut-off events. [2024-06-21 17:49:53,324 INFO L125 PetriNetUnfolderBase]: For 194739/194926 co-relation queries the response was YES. [2024-06-21 17:49:53,351 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. [2024-06-21 17:49:53,369 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 218 selfloop transitions, 111 changer transitions 0/386 dead transitions. [2024-06-21 17:49:53,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 386 transitions, 6698 flow [2024-06-21 17:49:53,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:49:53,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:49:53,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 17:49:53,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-06-21 17:49:53,371 INFO L175 Difference]: Start difference. First operand has 220 places, 352 transitions, 5866 flow. Second operand 9 states and 155 transitions. [2024-06-21 17:49:53,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 386 transitions, 6698 flow [2024-06-21 17:49:53,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 386 transitions, 6485 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-21 17:49:53,726 INFO L231 Difference]: Finished difference. Result has 222 places, 354 transitions, 5943 flow [2024-06-21 17:49:53,727 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} [2024-06-21 17:49:53,727 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 181 predicate places. [2024-06-21 17:49:53,727 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 354 transitions, 5943 flow [2024-06-21 17:49:53,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:53,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:53,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:53,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 17:49:53,728 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)] === [2024-06-21 17:49:53,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:53,728 INFO L85 PathProgramCache]: Analyzing trace with hash -495922010, now seen corresponding path program 1 times [2024-06-21 17:49:53,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:53,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783630776] [2024-06-21 17:49:53,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:53,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:53,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:54,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:54,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:54,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783630776] [2024-06-21 17:49:54,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783630776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:54,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:54,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:49:54,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647676573] [2024-06-21 17:49:54,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:54,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:49:54,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:54,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:49:54,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:49:54,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:49:54,520 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) [2024-06-21 17:49:54,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:54,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:49:54,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:55,419 INFO L124 PetriNetUnfolderBase]: 2719/4057 cut-off events. [2024-06-21 17:49:55,419 INFO L125 PetriNetUnfolderBase]: For 186901/186905 co-relation queries the response was YES. [2024-06-21 17:49:55,443 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. [2024-06-21 17:49:55,460 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 317 selfloop transitions, 71 changer transitions 0/391 dead transitions. [2024-06-21 17:49:55,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 391 transitions, 6964 flow [2024-06-21 17:49:55,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:49:55,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:49:55,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-21 17:49:55,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4111111111111111 [2024-06-21 17:49:55,462 INFO L175 Difference]: Start difference. First operand has 222 places, 354 transitions, 5943 flow. Second operand 9 states and 148 transitions. [2024-06-21 17:49:55,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 391 transitions, 6964 flow [2024-06-21 17:49:55,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 391 transitions, 6714 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-21 17:49:55,808 INFO L231 Difference]: Finished difference. Result has 225 places, 359 transitions, 5996 flow [2024-06-21 17:49:55,808 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} [2024-06-21 17:49:55,809 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 184 predicate places. [2024-06-21 17:49:55,809 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 359 transitions, 5996 flow [2024-06-21 17:49:55,809 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) [2024-06-21 17:49:55,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:55,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:55,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 17:49:55,809 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)] === [2024-06-21 17:49:55,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:55,810 INFO L85 PathProgramCache]: Analyzing trace with hash -278258164, now seen corresponding path program 1 times [2024-06-21 17:49:55,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:55,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681580406] [2024-06-21 17:49:55,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:55,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:55,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:56,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:56,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:56,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681580406] [2024-06-21 17:49:56,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681580406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:56,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:56,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:49:56,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569856436] [2024-06-21 17:49:56,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:56,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:49:56,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:56,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:49:56,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:49:56,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:49:56,514 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) [2024-06-21 17:49:56,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:56,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:49:56,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:57,334 INFO L124 PetriNetUnfolderBase]: 2712/4042 cut-off events. [2024-06-21 17:49:57,335 INFO L125 PetriNetUnfolderBase]: For 191609/191613 co-relation queries the response was YES. [2024-06-21 17:49:57,361 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. [2024-06-21 17:49:57,378 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 288 selfloop transitions, 102 changer transitions 0/393 dead transitions. [2024-06-21 17:49:57,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 393 transitions, 7090 flow [2024-06-21 17:49:57,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:49:57,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:49:57,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 17:49:57,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 17:49:57,379 INFO L175 Difference]: Start difference. First operand has 225 places, 359 transitions, 5996 flow. Second operand 9 states and 153 transitions. [2024-06-21 17:49:57,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 393 transitions, 7090 flow [2024-06-21 17:49:57,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 393 transitions, 6988 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-21 17:49:57,738 INFO L231 Difference]: Finished difference. Result has 231 places, 360 transitions, 6179 flow [2024-06-21 17:49:57,738 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} [2024-06-21 17:49:57,738 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 190 predicate places. [2024-06-21 17:49:57,739 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 360 transitions, 6179 flow [2024-06-21 17:49:57,739 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) [2024-06-21 17:49:57,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:57,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:57,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 17:49:57,739 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)] === [2024-06-21 17:49:57,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:57,739 INFO L85 PathProgramCache]: Analyzing trace with hash 19175872, now seen corresponding path program 4 times [2024-06-21 17:49:57,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:57,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547533132] [2024-06-21 17:49:57,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:57,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:57,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:58,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:58,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:58,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547533132] [2024-06-21 17:49:58,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547533132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:58,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:58,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:49:58,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967765475] [2024-06-21 17:49:58,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:58,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:49:58,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:58,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:49:58,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:49:58,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:49:58,651 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) [2024-06-21 17:49:58,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:58,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:49:58,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:59,510 INFO L124 PetriNetUnfolderBase]: 2628/3965 cut-off events. [2024-06-21 17:49:59,511 INFO L125 PetriNetUnfolderBase]: For 218564/218709 co-relation queries the response was YES. [2024-06-21 17:49:59,539 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. [2024-06-21 17:49:59,558 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 255 selfloop transitions, 88 changer transitions 0/403 dead transitions. [2024-06-21 17:49:59,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 403 transitions, 7094 flow [2024-06-21 17:49:59,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:49:59,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:49:59,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 17:49:59,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-21 17:49:59,559 INFO L175 Difference]: Start difference. First operand has 231 places, 360 transitions, 6179 flow. Second operand 9 states and 156 transitions. [2024-06-21 17:49:59,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 403 transitions, 7094 flow [2024-06-21 17:49:59,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 403 transitions, 6935 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 17:49:59,902 INFO L231 Difference]: Finished difference. Result has 236 places, 372 transitions, 6363 flow [2024-06-21 17:49:59,903 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} [2024-06-21 17:49:59,903 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 195 predicate places. [2024-06-21 17:49:59,903 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 372 transitions, 6363 flow [2024-06-21 17:49:59,904 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) [2024-06-21 17:49:59,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:59,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:59,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 17:49:59,904 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)] === [2024-06-21 17:49:59,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:59,904 INFO L85 PathProgramCache]: Analyzing trace with hash -726729144, now seen corresponding path program 5 times [2024-06-21 17:49:59,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:59,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792165693] [2024-06-21 17:49:59,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:59,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:59,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:00,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:50:00,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:00,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792165693] [2024-06-21 17:50:00,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792165693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:00,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:00,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:50:00,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900241138] [2024-06-21 17:50:00,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:00,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:50:00,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:00,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:50:00,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:50:00,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:50:00,755 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) [2024-06-21 17:50:00,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:00,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:50:00,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:50:01,681 INFO L124 PetriNetUnfolderBase]: 2656/4017 cut-off events. [2024-06-21 17:50:01,682 INFO L125 PetriNetUnfolderBase]: For 232371/232586 co-relation queries the response was YES. [2024-06-21 17:50:01,712 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. [2024-06-21 17:50:01,732 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 236 selfloop transitions, 110 changer transitions 0/406 dead transitions. [2024-06-21 17:50:01,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 406 transitions, 7233 flow [2024-06-21 17:50:01,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:50:01,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:50:01,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 17:50:01,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-21 17:50:01,757 INFO L175 Difference]: Start difference. First operand has 236 places, 372 transitions, 6363 flow. Second operand 9 states and 156 transitions. [2024-06-21 17:50:01,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 406 transitions, 7233 flow [2024-06-21 17:50:02,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 406 transitions, 7040 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-21 17:50:02,193 INFO L231 Difference]: Finished difference. Result has 239 places, 376 transitions, 6480 flow [2024-06-21 17:50:02,193 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} [2024-06-21 17:50:02,193 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 198 predicate places. [2024-06-21 17:50:02,194 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 376 transitions, 6480 flow [2024-06-21 17:50:02,194 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) [2024-06-21 17:50:02,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:50:02,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:50:02,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 17:50:02,194 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)] === [2024-06-21 17:50:02,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:50:02,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1743829218, now seen corresponding path program 2 times [2024-06-21 17:50:02,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:50:02,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143829903] [2024-06-21 17:50:02,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:50:02,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:50:02,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:02,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:50:02,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:02,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143829903] [2024-06-21 17:50:02,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143829903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:02,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:02,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:50:02,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073204716] [2024-06-21 17:50:02,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:02,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:50:02,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:02,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:50:02,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:50:03,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:50:03,024 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) [2024-06-21 17:50:03,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:03,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:50:03,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:50:03,992 INFO L124 PetriNetUnfolderBase]: 2882/4309 cut-off events. [2024-06-21 17:50:03,992 INFO L125 PetriNetUnfolderBase]: For 220018/220024 co-relation queries the response was YES. [2024-06-21 17:50:04,020 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. [2024-06-21 17:50:04,038 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 334 selfloop transitions, 74 changer transitions 0/411 dead transitions. [2024-06-21 17:50:04,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 411 transitions, 7512 flow [2024-06-21 17:50:04,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:50:04,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:50:04,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-21 17:50:04,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41388888888888886 [2024-06-21 17:50:04,039 INFO L175 Difference]: Start difference. First operand has 239 places, 376 transitions, 6480 flow. Second operand 9 states and 149 transitions. [2024-06-21 17:50:04,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 411 transitions, 7512 flow [2024-06-21 17:50:04,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 411 transitions, 7272 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-21 17:50:04,474 INFO L231 Difference]: Finished difference. Result has 243 places, 381 transitions, 6536 flow [2024-06-21 17:50:04,475 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} [2024-06-21 17:50:04,475 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 202 predicate places. [2024-06-21 17:50:04,475 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 381 transitions, 6536 flow [2024-06-21 17:50:04,475 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) [2024-06-21 17:50:04,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:50:04,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:50:04,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 17:50:04,476 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)] === [2024-06-21 17:50:04,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:50:04,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1859420282, now seen corresponding path program 1 times [2024-06-21 17:50:04,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:50:04,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063605013] [2024-06-21 17:50:04,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:50:04,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:50:04,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:05,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:50:05,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:05,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063605013] [2024-06-21 17:50:05,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063605013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:05,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:05,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:50:05,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381926366] [2024-06-21 17:50:05,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:05,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:50:05,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:05,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:50:05,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:50:05,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:50:05,257 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) [2024-06-21 17:50:05,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:05,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:50:05,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:50:06,209 INFO L124 PetriNetUnfolderBase]: 2899/4338 cut-off events. [2024-06-21 17:50:06,210 INFO L125 PetriNetUnfolderBase]: For 231590/231594 co-relation queries the response was YES. [2024-06-21 17:50:06,246 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. [2024-06-21 17:50:06,268 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 385 selfloop transitions, 28 changer transitions 0/416 dead transitions. [2024-06-21 17:50:06,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 416 transitions, 7528 flow [2024-06-21 17:50:06,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:50:06,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:50:06,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2024-06-21 17:50:06,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-06-21 17:50:06,269 INFO L175 Difference]: Start difference. First operand has 243 places, 381 transitions, 6536 flow. Second operand 10 states and 155 transitions. [2024-06-21 17:50:06,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 416 transitions, 7528 flow [2024-06-21 17:50:06,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 416 transitions, 7349 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 17:50:06,850 INFO L231 Difference]: Finished difference. Result has 247 places, 383 transitions, 6456 flow [2024-06-21 17:50:06,850 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} [2024-06-21 17:50:06,850 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 206 predicate places. [2024-06-21 17:50:06,850 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 383 transitions, 6456 flow [2024-06-21 17:50:06,851 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) [2024-06-21 17:50:06,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:50:06,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:50:06,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 17:50:06,853 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)] === [2024-06-21 17:50:06,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:50:06,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1029037972, now seen corresponding path program 6 times [2024-06-21 17:50:06,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:50:06,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140094863] [2024-06-21 17:50:06,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:50:06,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:50:06,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:07,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:50:07,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:07,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140094863] [2024-06-21 17:50:07,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140094863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:07,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:07,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:50:07,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049145146] [2024-06-21 17:50:07,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:07,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:50:07,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:07,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:50:07,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:50:07,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:50:07,687 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) [2024-06-21 17:50:07,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:07,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:50:07,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:50:08,557 INFO L124 PetriNetUnfolderBase]: 2695/4074 cut-off events. [2024-06-21 17:50:08,557 INFO L125 PetriNetUnfolderBase]: For 252170/252405 co-relation queries the response was YES. [2024-06-21 17:50:08,587 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. [2024-06-21 17:50:08,606 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 218 selfloop transitions, 134 changer transitions 0/416 dead transitions. [2024-06-21 17:50:08,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 416 transitions, 7346 flow [2024-06-21 17:50:08,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:50:08,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:50:08,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 17:50:08,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-21 17:50:08,607 INFO L175 Difference]: Start difference. First operand has 247 places, 383 transitions, 6456 flow. Second operand 9 states and 156 transitions. [2024-06-21 17:50:08,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 416 transitions, 7346 flow [2024-06-21 17:50:09,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 416 transitions, 7265 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 17:50:09,095 INFO L231 Difference]: Finished difference. Result has 248 places, 385 transitions, 6713 flow [2024-06-21 17:50:09,095 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} [2024-06-21 17:50:09,096 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 207 predicate places. [2024-06-21 17:50:09,096 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 385 transitions, 6713 flow [2024-06-21 17:50:09,096 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) [2024-06-21 17:50:09,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:50:09,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:50:09,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 17:50:09,096 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)] === [2024-06-21 17:50:09,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:50:09,097 INFO L85 PathProgramCache]: Analyzing trace with hash 454461134, now seen corresponding path program 7 times [2024-06-21 17:50:09,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:50:09,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335128972] [2024-06-21 17:50:09,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:50:09,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:50:09,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:09,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:50:09,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:09,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335128972] [2024-06-21 17:50:09,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335128972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:09,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:09,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:50:09,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26725208] [2024-06-21 17:50:09,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:09,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:50:09,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:09,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:50:09,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:50:09,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:50:09,885 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) [2024-06-21 17:50:09,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:09,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:50:09,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:50:10,884 INFO L124 PetriNetUnfolderBase]: 2718/4110 cut-off events. [2024-06-21 17:50:10,884 INFO L125 PetriNetUnfolderBase]: For 274767/275022 co-relation queries the response was YES. [2024-06-21 17:50:10,917 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. [2024-06-21 17:50:10,938 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 250 selfloop transitions, 101 changer transitions 0/415 dead transitions. [2024-06-21 17:50:10,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 415 transitions, 7589 flow [2024-06-21 17:50:10,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:50:10,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:50:10,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 17:50:10,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428125 [2024-06-21 17:50:10,940 INFO L175 Difference]: Start difference. First operand has 248 places, 385 transitions, 6713 flow. Second operand 8 states and 137 transitions. [2024-06-21 17:50:10,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 415 transitions, 7589 flow [2024-06-21 17:50:11,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 415 transitions, 7271 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-21 17:50:11,497 INFO L231 Difference]: Finished difference. Result has 249 places, 387 transitions, 6688 flow [2024-06-21 17:50:11,497 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} [2024-06-21 17:50:11,498 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 208 predicate places. [2024-06-21 17:50:11,498 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 387 transitions, 6688 flow [2024-06-21 17:50:11,498 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) [2024-06-21 17:50:11,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:50:11,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:50:11,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 17:50:11,499 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)] === [2024-06-21 17:50:11,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:50:11,499 INFO L85 PathProgramCache]: Analyzing trace with hash -613312120, now seen corresponding path program 3 times [2024-06-21 17:50:11,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:50:11,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855042710] [2024-06-21 17:50:11,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:50:11,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:50:11,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:12,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:50:12,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:12,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855042710] [2024-06-21 17:50:12,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855042710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:12,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:12,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:50:12,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541024195] [2024-06-21 17:50:12,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:12,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:50:12,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:12,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:50:12,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:50:12,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:50:12,515 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) [2024-06-21 17:50:12,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:12,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:50:12,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:50:13,542 INFO L124 PetriNetUnfolderBase]: 2944/4415 cut-off events. [2024-06-21 17:50:13,542 INFO L125 PetriNetUnfolderBase]: For 249309/249313 co-relation queries the response was YES. [2024-06-21 17:50:13,573 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. [2024-06-21 17:50:13,593 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 314 selfloop transitions, 98 changer transitions 0/415 dead transitions. [2024-06-21 17:50:13,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 415 transitions, 7632 flow [2024-06-21 17:50:13,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:50:13,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:50:13,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 17:50:13,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-21 17:50:13,595 INFO L175 Difference]: Start difference. First operand has 249 places, 387 transitions, 6688 flow. Second operand 8 states and 132 transitions. [2024-06-21 17:50:13,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 415 transitions, 7632 flow [2024-06-21 17:50:14,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 415 transitions, 7365 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-21 17:50:14,159 INFO L231 Difference]: Finished difference. Result has 251 places, 387 transitions, 6657 flow [2024-06-21 17:50:14,160 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} [2024-06-21 17:50:14,160 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 210 predicate places. [2024-06-21 17:50:14,160 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 387 transitions, 6657 flow [2024-06-21 17:50:14,160 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) [2024-06-21 17:50:14,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:50:14,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:50:14,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 17:50:14,161 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)] === [2024-06-21 17:50:14,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:50:14,161 INFO L85 PathProgramCache]: Analyzing trace with hash -613312244, now seen corresponding path program 8 times [2024-06-21 17:50:14,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:50:14,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398776514] [2024-06-21 17:50:14,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:50:14,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:50:14,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:14,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:50:14,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:14,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398776514] [2024-06-21 17:50:14,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398776514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:14,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:14,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:50:14,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701153895] [2024-06-21 17:50:14,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:14,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:50:14,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:14,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:50:14,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:50:14,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:50:14,944 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) [2024-06-21 17:50:14,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:14,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:50:14,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:50:15,823 INFO L124 PetriNetUnfolderBase]: 2724/4141 cut-off events. [2024-06-21 17:50:15,824 INFO L125 PetriNetUnfolderBase]: For 257008/257285 co-relation queries the response was YES. [2024-06-21 17:50:15,854 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. [2024-06-21 17:50:15,873 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 212 selfloop transitions, 141 changer transitions 0/417 dead transitions. [2024-06-21 17:50:15,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 417 transitions, 7533 flow [2024-06-21 17:50:15,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:50:15,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:50:15,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 17:50:15,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-06-21 17:50:15,874 INFO L175 Difference]: Start difference. First operand has 251 places, 387 transitions, 6657 flow. Second operand 8 states and 138 transitions. [2024-06-21 17:50:15,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 417 transitions, 7533 flow [2024-06-21 17:50:16,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 417 transitions, 7393 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 17:50:16,380 INFO L231 Difference]: Finished difference. Result has 254 places, 389 transitions, 6893 flow [2024-06-21 17:50:16,380 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} [2024-06-21 17:50:16,380 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 213 predicate places. [2024-06-21 17:50:16,380 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 389 transitions, 6893 flow [2024-06-21 17:50:16,381 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) [2024-06-21 17:50:16,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:50:16,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:50:16,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 17:50:16,381 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)] === [2024-06-21 17:50:16,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:50:16,381 INFO L85 PathProgramCache]: Analyzing trace with hash 457323054, now seen corresponding path program 2 times [2024-06-21 17:50:16,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:50:16,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806578745] [2024-06-21 17:50:16,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:50:16,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:50:16,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:17,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:50:17,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:17,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806578745] [2024-06-21 17:50:17,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806578745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:17,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:17,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:50:17,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036279272] [2024-06-21 17:50:17,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:17,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:50:17,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:17,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:50:17,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:50:17,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:50:17,088 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) [2024-06-21 17:50:17,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:17,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:50:17,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:50:17,981 INFO L124 PetriNetUnfolderBase]: 2959/4430 cut-off events. [2024-06-21 17:50:17,981 INFO L125 PetriNetUnfolderBase]: For 225353/225357 co-relation queries the response was YES. [2024-06-21 17:50:18,014 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. [2024-06-21 17:50:18,033 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 281 selfloop transitions, 132 changer transitions 0/416 dead transitions. [2024-06-21 17:50:18,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 416 transitions, 7839 flow [2024-06-21 17:50:18,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:50:18,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:50:18,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 17:50:18,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-06-21 17:50:18,035 INFO L175 Difference]: Start difference. First operand has 254 places, 389 transitions, 6893 flow. Second operand 8 states and 134 transitions. [2024-06-21 17:50:18,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 416 transitions, 7839 flow [2024-06-21 17:50:18,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 416 transitions, 7507 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-21 17:50:18,545 INFO L231 Difference]: Finished difference. Result has 256 places, 389 transitions, 6855 flow [2024-06-21 17:50:18,545 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} [2024-06-21 17:50:18,546 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 215 predicate places. [2024-06-21 17:50:18,546 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 389 transitions, 6855 flow [2024-06-21 17:50:18,546 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) [2024-06-21 17:50:18,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:50:18,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:50:18,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 17:50:18,546 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)] === [2024-06-21 17:50:18,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:50:18,547 INFO L85 PathProgramCache]: Analyzing trace with hash 572609264, now seen corresponding path program 9 times [2024-06-21 17:50:18,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:50:18,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555274177] [2024-06-21 17:50:18,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:50:18,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:50:18,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:19,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:50:19,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:19,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555274177] [2024-06-21 17:50:19,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555274177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:19,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:19,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:50:19,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063394710] [2024-06-21 17:50:19,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:19,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:50:19,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:19,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:50:19,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:50:19,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:50:19,452 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) [2024-06-21 17:50:19,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:19,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:50:19,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:50:20,405 INFO L124 PetriNetUnfolderBase]: 2725/4130 cut-off events. [2024-06-21 17:50:20,406 INFO L125 PetriNetUnfolderBase]: For 231535/231801 co-relation queries the response was YES. [2024-06-21 17:50:20,433 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. [2024-06-21 17:50:20,449 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 204 selfloop transitions, 150 changer transitions 0/418 dead transitions. [2024-06-21 17:50:20,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 418 transitions, 7729 flow [2024-06-21 17:50:20,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:50:20,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:50:20,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 17:50:20,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-06-21 17:50:20,450 INFO L175 Difference]: Start difference. First operand has 256 places, 389 transitions, 6855 flow. Second operand 8 states and 138 transitions. [2024-06-21 17:50:20,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 418 transitions, 7729 flow [2024-06-21 17:50:20,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 418 transitions, 7199 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-21 17:50:20,836 INFO L231 Difference]: Finished difference. Result has 253 places, 391 transitions, 6691 flow [2024-06-21 17:50:20,836 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} [2024-06-21 17:50:20,836 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 212 predicate places. [2024-06-21 17:50:20,836 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 391 transitions, 6691 flow [2024-06-21 17:50:20,837 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) [2024-06-21 17:50:20,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:50:20,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:50:20,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 17:50:20,837 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)] === [2024-06-21 17:50:20,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:50:20,837 INFO L85 PathProgramCache]: Analyzing trace with hash -495039866, now seen corresponding path program 2 times [2024-06-21 17:50:20,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:50:20,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591360890] [2024-06-21 17:50:20,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:50:20,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:50:20,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:21,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:50:21,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:21,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591360890] [2024-06-21 17:50:21,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591360890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:21,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:21,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:50:21,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026459158] [2024-06-21 17:50:21,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:21,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:50:21,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:21,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:50:21,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:50:21,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:50:21,620 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) [2024-06-21 17:50:21,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:21,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:50:21,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:50:22,495 INFO L124 PetriNetUnfolderBase]: 3001/4500 cut-off events. [2024-06-21 17:50:22,495 INFO L125 PetriNetUnfolderBase]: For 216956/216960 co-relation queries the response was YES. [2024-06-21 17:50:22,528 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. [2024-06-21 17:50:22,548 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 382 selfloop transitions, 37 changer transitions 0/422 dead transitions. [2024-06-21 17:50:22,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 422 transitions, 7687 flow [2024-06-21 17:50:22,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:50:22,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:50:22,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-21 17:50:22,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-21 17:50:22,551 INFO L175 Difference]: Start difference. First operand has 253 places, 391 transitions, 6691 flow. Second operand 9 states and 140 transitions. [2024-06-21 17:50:22,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 422 transitions, 7687 flow [2024-06-21 17:50:23,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 422 transitions, 7345 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-21 17:50:23,064 INFO L231 Difference]: Finished difference. Result has 256 places, 393 transitions, 6473 flow [2024-06-21 17:50:23,065 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} [2024-06-21 17:50:23,065 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 215 predicate places. [2024-06-21 17:50:23,065 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 393 transitions, 6473 flow [2024-06-21 17:50:23,065 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) [2024-06-21 17:50:23,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:50:23,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:50:23,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 17:50:23,066 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)] === [2024-06-21 17:50:23,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:50:23,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1833868956, now seen corresponding path program 3 times [2024-06-21 17:50:23,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:50:23,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503651463] [2024-06-21 17:50:23,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:50:23,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:50:23,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:23,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:50:23,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:23,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503651463] [2024-06-21 17:50:23,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503651463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:23,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:23,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:50:23,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508705002] [2024-06-21 17:50:23,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:23,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:50:23,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:23,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:50:23,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:50:23,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:50:23,822 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) [2024-06-21 17:50:23,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:23,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:50:23,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:50:24,681 INFO L124 PetriNetUnfolderBase]: 3018/4531 cut-off events. [2024-06-21 17:50:24,681 INFO L125 PetriNetUnfolderBase]: For 214357/214365 co-relation queries the response was YES. [2024-06-21 17:50:24,715 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. [2024-06-21 17:50:24,734 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 363 selfloop transitions, 65 changer transitions 0/431 dead transitions. [2024-06-21 17:50:24,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 431 transitions, 7715 flow [2024-06-21 17:50:24,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:50:24,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:50:24,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-21 17:50:24,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 17:50:24,736 INFO L175 Difference]: Start difference. First operand has 256 places, 393 transitions, 6473 flow. Second operand 9 states and 144 transitions. [2024-06-21 17:50:24,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 431 transitions, 7715 flow [2024-06-21 17:50:25,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 431 transitions, 7599 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-21 17:50:25,159 INFO L231 Difference]: Finished difference. Result has 259 places, 401 transitions, 6636 flow [2024-06-21 17:50:25,160 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} [2024-06-21 17:50:25,160 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 218 predicate places. [2024-06-21 17:50:25,160 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 401 transitions, 6636 flow [2024-06-21 17:50:25,161 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) [2024-06-21 17:50:25,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:50:25,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:50:25,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 17:50:25,161 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)] === [2024-06-21 17:50:25,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:50:25,162 INFO L85 PathProgramCache]: Analyzing trace with hash -49976976, now seen corresponding path program 4 times [2024-06-21 17:50:25,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:50:25,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860410669] [2024-06-21 17:50:25,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:50:25,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:50:25,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:25,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:50:25,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:25,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860410669] [2024-06-21 17:50:25,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860410669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:25,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:25,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:50:25,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66180318] [2024-06-21 17:50:25,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:25,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:50:25,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:25,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:50:25,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:50:25,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:50:25,965 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) [2024-06-21 17:50:25,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:25,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:50:25,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:50:26,928 INFO L124 PetriNetUnfolderBase]: 3035/4559 cut-off events. [2024-06-21 17:50:26,928 INFO L125 PetriNetUnfolderBase]: For 215078/215086 co-relation queries the response was YES. [2024-06-21 17:50:26,958 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. [2024-06-21 17:50:26,976 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 372 selfloop transitions, 59 changer transitions 0/434 dead transitions. [2024-06-21 17:50:26,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 434 transitions, 7672 flow [2024-06-21 17:50:26,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:50:26,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:50:26,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2024-06-21 17:50:26,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-06-21 17:50:26,978 INFO L175 Difference]: Start difference. First operand has 259 places, 401 transitions, 6636 flow. Second operand 10 states and 155 transitions. [2024-06-21 17:50:26,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 434 transitions, 7672 flow [2024-06-21 17:50:27,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 434 transitions, 7569 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-21 17:50:27,437 INFO L231 Difference]: Finished difference. Result has 265 places, 403 transitions, 6703 flow [2024-06-21 17:50:27,438 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} [2024-06-21 17:50:27,438 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 224 predicate places. [2024-06-21 17:50:27,438 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 403 transitions, 6703 flow [2024-06-21 17:50:27,438 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) [2024-06-21 17:50:27,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:50:27,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:50:27,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 17:50:27,439 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)] === [2024-06-21 17:50:27,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:50:27,439 INFO L85 PathProgramCache]: Analyzing trace with hash -2070525684, now seen corresponding path program 10 times [2024-06-21 17:50:27,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:50:27,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432221179] [2024-06-21 17:50:27,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:50:27,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:50:27,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:28,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:50:28,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:28,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432221179] [2024-06-21 17:50:28,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432221179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:28,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:28,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:50:28,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4364175] [2024-06-21 17:50:28,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:28,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:50:28,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:28,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:50:28,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:50:28,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:50:28,314 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) [2024-06-21 17:50:28,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:28,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:50:28,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:50:29,137 INFO L124 PetriNetUnfolderBase]: 2761/4194 cut-off events. [2024-06-21 17:50:29,138 INFO L125 PetriNetUnfolderBase]: For 231513/231779 co-relation queries the response was YES. [2024-06-21 17:50:29,171 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. [2024-06-21 17:50:29,189 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 204 selfloop transitions, 156 changer transitions 0/430 dead transitions. [2024-06-21 17:50:29,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 430 transitions, 7583 flow [2024-06-21 17:50:29,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:50:29,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:50:29,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 17:50:29,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428125 [2024-06-21 17:50:29,191 INFO L175 Difference]: Start difference. First operand has 265 places, 403 transitions, 6703 flow. Second operand 8 states and 137 transitions. [2024-06-21 17:50:29,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 430 transitions, 7583 flow [2024-06-21 17:50:29,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 430 transitions, 7451 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 17:50:29,687 INFO L231 Difference]: Finished difference. Result has 266 places, 405 transitions, 6945 flow [2024-06-21 17:50:29,688 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} [2024-06-21 17:50:29,688 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 225 predicate places. [2024-06-21 17:50:29,688 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 405 transitions, 6945 flow [2024-06-21 17:50:29,688 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) [2024-06-21 17:50:29,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:50:29,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:50:29,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 17:50:29,689 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)] === [2024-06-21 17:50:29,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:50:29,689 INFO L85 PathProgramCache]: Analyzing trace with hash -2070340986, now seen corresponding path program 5 times [2024-06-21 17:50:29,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:50:29,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568045666] [2024-06-21 17:50:29,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:50:29,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:50:29,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:30,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:50:30,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:30,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568045666] [2024-06-21 17:50:30,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568045666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:30,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:30,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:50:30,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324526116] [2024-06-21 17:50:30,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:30,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:50:30,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:30,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:50:30,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:50:30,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:50:30,458 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) [2024-06-21 17:50:30,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:30,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:50:30,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:50:31,298 INFO L124 PetriNetUnfolderBase]: 3014/4528 cut-off events. [2024-06-21 17:50:31,298 INFO L125 PetriNetUnfolderBase]: For 225487/225495 co-relation queries the response was YES. [2024-06-21 17:50:31,334 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. [2024-06-21 17:50:31,354 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 387 selfloop transitions, 42 changer transitions 0/432 dead transitions. [2024-06-21 17:50:31,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 432 transitions, 7919 flow [2024-06-21 17:50:31,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:50:31,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:50:31,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-21 17:50:31,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39166666666666666 [2024-06-21 17:50:31,356 INFO L175 Difference]: Start difference. First operand has 266 places, 405 transitions, 6945 flow. Second operand 9 states and 141 transitions. [2024-06-21 17:50:31,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 432 transitions, 7919 flow [2024-06-21 17:50:31,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 432 transitions, 7551 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-21 17:50:31,873 INFO L231 Difference]: Finished difference. Result has 269 places, 405 transitions, 6668 flow [2024-06-21 17:50:31,874 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} [2024-06-21 17:50:31,874 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 228 predicate places. [2024-06-21 17:50:31,874 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 405 transitions, 6668 flow [2024-06-21 17:50:31,874 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) [2024-06-21 17:50:31,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:50:31,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:50:31,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 17:50:31,875 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)] === [2024-06-21 17:50:31,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:50:31,877 INFO L85 PathProgramCache]: Analyzing trace with hash -788681250, now seen corresponding path program 1 times [2024-06-21 17:50:31,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:50:31,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407440729] [2024-06-21 17:50:31,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:50:31,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:50:31,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:32,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:50:32,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:32,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407440729] [2024-06-21 17:50:32,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407440729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:32,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:32,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:50:32,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137930372] [2024-06-21 17:50:32,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:32,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:50:32,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:32,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:50:32,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:50:32,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:50:32,676 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) [2024-06-21 17:50:32,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:32,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:50:32,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:50:33,693 INFO L124 PetriNetUnfolderBase]: 3031/4554 cut-off events. [2024-06-21 17:50:33,693 INFO L125 PetriNetUnfolderBase]: For 231490/231496 co-relation queries the response was YES. [2024-06-21 17:50:33,726 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. [2024-06-21 17:50:33,745 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 396 selfloop transitions, 59 changer transitions 0/458 dead transitions. [2024-06-21 17:50:33,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 458 transitions, 7936 flow [2024-06-21 17:50:33,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:50:33,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:50:33,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-21 17:50:33,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3975 [2024-06-21 17:50:33,746 INFO L175 Difference]: Start difference. First operand has 269 places, 405 transitions, 6668 flow. Second operand 10 states and 159 transitions. [2024-06-21 17:50:33,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 458 transitions, 7936 flow [2024-06-21 17:50:34,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 458 transitions, 7817 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 17:50:34,262 INFO L231 Difference]: Finished difference. Result has 274 places, 420 transitions, 6939 flow [2024-06-21 17:50:34,263 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} [2024-06-21 17:50:34,263 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 233 predicate places. [2024-06-21 17:50:34,263 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 420 transitions, 6939 flow [2024-06-21 17:50:34,263 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) [2024-06-21 17:50:34,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:50:34,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:50:34,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 17:50:34,264 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)] === [2024-06-21 17:50:34,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:50:34,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1748076050, now seen corresponding path program 2 times [2024-06-21 17:50:34,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:50:34,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885364565] [2024-06-21 17:50:34,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:50:34,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:50:34,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:35,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:50:35,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:35,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885364565] [2024-06-21 17:50:35,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885364565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:35,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:35,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:50:35,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659246534] [2024-06-21 17:50:35,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:35,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:50:35,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:35,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:50:35,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:50:35,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:50:35,150 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) [2024-06-21 17:50:35,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:35,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:50:35,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:50:36,116 INFO L124 PetriNetUnfolderBase]: 3059/4594 cut-off events. [2024-06-21 17:50:36,117 INFO L125 PetriNetUnfolderBase]: For 240628/240634 co-relation queries the response was YES. [2024-06-21 17:50:36,155 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. [2024-06-21 17:50:36,177 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 403 selfloop transitions, 62 changer transitions 0/468 dead transitions. [2024-06-21 17:50:36,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 468 transitions, 8209 flow [2024-06-21 17:50:36,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:50:36,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:50:36,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-21 17:50:36,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025 [2024-06-21 17:50:36,179 INFO L175 Difference]: Start difference. First operand has 274 places, 420 transitions, 6939 flow. Second operand 10 states and 161 transitions. [2024-06-21 17:50:36,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 468 transitions, 8209 flow [2024-06-21 17:50:36,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 468 transitions, 7992 flow, removed 84 selfloop flow, removed 4 redundant places. [2024-06-21 17:50:36,762 INFO L231 Difference]: Finished difference. Result has 282 places, 430 transitions, 7084 flow [2024-06-21 17:50:36,763 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} [2024-06-21 17:50:36,763 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 241 predicate places. [2024-06-21 17:50:36,763 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 430 transitions, 7084 flow [2024-06-21 17:50:36,763 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) [2024-06-21 17:50:36,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:50:36,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:50:36,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 17:50:36,764 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)] === [2024-06-21 17:50:36,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:50:36,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1805159450, now seen corresponding path program 3 times [2024-06-21 17:50:36,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:50:36,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586398395] [2024-06-21 17:50:36,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:50:36,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:50:36,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:37,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:50:37,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:37,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586398395] [2024-06-21 17:50:37,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586398395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:37,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:37,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:50:37,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986825468] [2024-06-21 17:50:37,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:37,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:50:37,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:37,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:50:37,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:50:37,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:50:37,662 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) [2024-06-21 17:50:37,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:37,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:50:37,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:50:38,707 INFO L124 PetriNetUnfolderBase]: 3101/4662 cut-off events. [2024-06-21 17:50:38,708 INFO L125 PetriNetUnfolderBase]: For 252563/252567 co-relation queries the response was YES. [2024-06-21 17:50:38,747 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. [2024-06-21 17:50:38,768 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 396 selfloop transitions, 76 changer transitions 0/475 dead transitions. [2024-06-21 17:50:38,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 475 transitions, 8472 flow [2024-06-21 17:50:38,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:50:38,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:50:38,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-21 17:50:38,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-21 17:50:38,770 INFO L175 Difference]: Start difference. First operand has 282 places, 430 transitions, 7084 flow. Second operand 10 states and 165 transitions. [2024-06-21 17:50:38,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 475 transitions, 8472 flow [2024-06-21 17:50:39,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 475 transitions, 8383 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-21 17:50:39,486 INFO L231 Difference]: Finished difference. Result has 289 places, 436 transitions, 7289 flow [2024-06-21 17:50:39,486 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} [2024-06-21 17:50:39,486 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 248 predicate places. [2024-06-21 17:50:39,486 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 436 transitions, 7289 flow [2024-06-21 17:50:39,487 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) [2024-06-21 17:50:39,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:50:39,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:50:39,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 17:50:39,487 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)] === [2024-06-21 17:50:39,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:50:39,487 INFO L85 PathProgramCache]: Analyzing trace with hash 746093120, now seen corresponding path program 4 times [2024-06-21 17:50:39,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:50:39,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929788666] [2024-06-21 17:50:39,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:50:39,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:50:39,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:40,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:50:40,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:40,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929788666] [2024-06-21 17:50:40,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929788666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:40,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:40,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:50:40,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850625053] [2024-06-21 17:50:40,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:40,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:50:40,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:40,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:50:40,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:50:40,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:50:40,451 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) [2024-06-21 17:50:40,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:40,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:50:40,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:50:41,504 INFO L124 PetriNetUnfolderBase]: 3093/4654 cut-off events. [2024-06-21 17:50:41,505 INFO L125 PetriNetUnfolderBase]: For 258787/258791 co-relation queries the response was YES. [2024-06-21 17:50:41,543 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. [2024-06-21 17:50:41,564 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 393 selfloop transitions, 78 changer transitions 0/474 dead transitions. [2024-06-21 17:50:41,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 474 transitions, 8408 flow [2024-06-21 17:50:41,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:50:41,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:50:41,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-21 17:50:41,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.405 [2024-06-21 17:50:41,566 INFO L175 Difference]: Start difference. First operand has 289 places, 436 transitions, 7289 flow. Second operand 10 states and 162 transitions. [2024-06-21 17:50:41,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 474 transitions, 8408 flow [2024-06-21 17:50:42,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 474 transitions, 8206 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-21 17:50:42,355 INFO L231 Difference]: Finished difference. Result has 293 places, 437 transitions, 7280 flow [2024-06-21 17:50:42,355 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} [2024-06-21 17:50:42,355 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 252 predicate places. [2024-06-21 17:50:42,356 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 437 transitions, 7280 flow [2024-06-21 17:50:42,356 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) [2024-06-21 17:50:42,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:50:42,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:50:42,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 17:50:42,356 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)] === [2024-06-21 17:50:42,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:50:42,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1583964962, now seen corresponding path program 1 times [2024-06-21 17:50:42,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:50:42,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387933455] [2024-06-21 17:50:42,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:50:42,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:50:42,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:43,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:50:43,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:43,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387933455] [2024-06-21 17:50:43,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387933455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:43,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:43,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:50:43,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914065118] [2024-06-21 17:50:43,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:43,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:50:43,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:43,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:50:43,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:50:43,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:50:43,159 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) [2024-06-21 17:50:43,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:43,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:50:43,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:50:44,360 INFO L124 PetriNetUnfolderBase]: 3168/4769 cut-off events. [2024-06-21 17:50:44,360 INFO L125 PetriNetUnfolderBase]: For 284182/284188 co-relation queries the response was YES. [2024-06-21 17:50:44,394 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. [2024-06-21 17:50:44,413 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 365 selfloop transitions, 110 changer transitions 0/478 dead transitions. [2024-06-21 17:50:44,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 478 transitions, 8448 flow [2024-06-21 17:50:44,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:50:44,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:50:44,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-21 17:50:44,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4225 [2024-06-21 17:50:44,415 INFO L175 Difference]: Start difference. First operand has 293 places, 437 transitions, 7280 flow. Second operand 10 states and 169 transitions. [2024-06-21 17:50:44,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 478 transitions, 8448 flow [2024-06-21 17:50:45,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 478 transitions, 8322 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 17:50:45,208 INFO L231 Difference]: Finished difference. Result has 296 places, 438 transitions, 7410 flow [2024-06-21 17:50:45,209 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} [2024-06-21 17:50:45,209 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 255 predicate places. [2024-06-21 17:50:45,209 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 438 transitions, 7410 flow [2024-06-21 17:50:45,210 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) [2024-06-21 17:50:45,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:50:45,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:50:45,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 17:50:45,210 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)] === [2024-06-21 17:50:45,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:50:45,210 INFO L85 PathProgramCache]: Analyzing trace with hash 594452822, now seen corresponding path program 5 times [2024-06-21 17:50:45,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:50:45,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512475534] [2024-06-21 17:50:45,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:50:45,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:50:45,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:45,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:50:45,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:45,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512475534] [2024-06-21 17:50:45,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512475534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:45,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:45,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:50:45,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633476677] [2024-06-21 17:50:45,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:45,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:50:45,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:45,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:50:45,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:50:46,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:50:46,064 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) [2024-06-21 17:50:46,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:46,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:50:46,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:50:47,121 INFO L124 PetriNetUnfolderBase]: 3207/4830 cut-off events. [2024-06-21 17:50:47,122 INFO L125 PetriNetUnfolderBase]: For 278528/278536 co-relation queries the response was YES. [2024-06-21 17:50:47,165 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. [2024-06-21 17:50:47,187 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 420 selfloop transitions, 64 changer transitions 0/487 dead transitions. [2024-06-21 17:50:47,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 487 transitions, 8667 flow [2024-06-21 17:50:47,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:50:47,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:50:47,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-21 17:50:47,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.405 [2024-06-21 17:50:47,188 INFO L175 Difference]: Start difference. First operand has 296 places, 438 transitions, 7410 flow. Second operand 10 states and 162 transitions. [2024-06-21 17:50:47,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 487 transitions, 8667 flow [2024-06-21 17:50:47,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 487 transitions, 8443 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 17:50:47,948 INFO L231 Difference]: Finished difference. Result has 300 places, 451 transitions, 7523 flow [2024-06-21 17:50:47,949 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} [2024-06-21 17:50:47,949 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 259 predicate places. [2024-06-21 17:50:47,949 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 451 transitions, 7523 flow [2024-06-21 17:50:47,950 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) [2024-06-21 17:50:47,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:50:47,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:50:47,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 17:50:47,950 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)] === [2024-06-21 17:50:47,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:50:47,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1053766194, now seen corresponding path program 6 times [2024-06-21 17:50:47,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:50:47,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400725322] [2024-06-21 17:50:47,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:50:47,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:50:47,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:48,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:50:48,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:48,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400725322] [2024-06-21 17:50:48,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400725322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:48,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:48,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:50:48,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080875616] [2024-06-21 17:50:48,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:48,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:50:48,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:48,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:50:48,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:50:48,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:50:48,861 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) [2024-06-21 17:50:48,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:48,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:50:48,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:50:49,947 INFO L124 PetriNetUnfolderBase]: 3271/4930 cut-off events. [2024-06-21 17:50:49,948 INFO L125 PetriNetUnfolderBase]: For 294623/294631 co-relation queries the response was YES. [2024-06-21 17:50:49,991 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. [2024-06-21 17:50:50,011 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 416 selfloop transitions, 79 changer transitions 0/498 dead transitions. [2024-06-21 17:50:50,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 498 transitions, 9004 flow [2024-06-21 17:50:50,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:50:50,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:50:50,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-21 17:50:50,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415 [2024-06-21 17:50:50,013 INFO L175 Difference]: Start difference. First operand has 300 places, 451 transitions, 7523 flow. Second operand 10 states and 166 transitions. [2024-06-21 17:50:50,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 498 transitions, 9004 flow [2024-06-21 17:50:50,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 498 transitions, 8904 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-21 17:50:50,903 INFO L231 Difference]: Finished difference. Result has 307 places, 461 transitions, 7779 flow [2024-06-21 17:50:50,904 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} [2024-06-21 17:50:50,904 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 266 predicate places. [2024-06-21 17:50:50,904 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 461 transitions, 7779 flow [2024-06-21 17:50:50,905 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) [2024-06-21 17:50:50,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:50:50,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:50:50,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 17:50:50,905 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)] === [2024-06-21 17:50:50,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:50:50,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1775868424, now seen corresponding path program 7 times [2024-06-21 17:50:50,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:50:50,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195049503] [2024-06-21 17:50:50,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:50:50,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:50:50,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:51,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:50:51,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:51,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195049503] [2024-06-21 17:50:51,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195049503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:51,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:51,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:50:51,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876901345] [2024-06-21 17:50:51,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:51,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:50:51,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:51,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:50:51,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:50:51,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:50:51,793 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) [2024-06-21 17:50:51,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:51,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:50:51,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:50:52,985 INFO L124 PetriNetUnfolderBase]: 3263/4920 cut-off events. [2024-06-21 17:50:52,986 INFO L125 PetriNetUnfolderBase]: For 301146/301154 co-relation queries the response was YES. [2024-06-21 17:50:53,033 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. [2024-06-21 17:50:53,055 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 416 selfloop transitions, 78 changer transitions 0/497 dead transitions. [2024-06-21 17:50:53,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 497 transitions, 8938 flow [2024-06-21 17:50:53,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:50:53,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:50:53,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-21 17:50:53,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4075 [2024-06-21 17:50:53,057 INFO L175 Difference]: Start difference. First operand has 307 places, 461 transitions, 7779 flow. Second operand 10 states and 163 transitions. [2024-06-21 17:50:53,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 497 transitions, 8938 flow [2024-06-21 17:50:54,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 497 transitions, 8729 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-21 17:50:54,078 INFO L231 Difference]: Finished difference. Result has 311 places, 462 transitions, 7771 flow [2024-06-21 17:50:54,079 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} [2024-06-21 17:50:54,079 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 270 predicate places. [2024-06-21 17:50:54,079 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 462 transitions, 7771 flow [2024-06-21 17:50:54,079 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) [2024-06-21 17:50:54,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:50:54,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:50:54,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 17:50:54,080 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)] === [2024-06-21 17:50:54,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:50:54,080 INFO L85 PathProgramCache]: Analyzing trace with hash 253835444, now seen corresponding path program 8 times [2024-06-21 17:50:54,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:50:54,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353197502] [2024-06-21 17:50:54,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:50:54,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:50:54,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:54,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:50:54,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:54,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353197502] [2024-06-21 17:50:54,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353197502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:54,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:54,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:50:54,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023183638] [2024-06-21 17:50:54,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:54,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:50:54,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:54,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:50:54,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:50:55,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:50:55,005 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) [2024-06-21 17:50:55,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:55,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:50:55,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:50:56,260 INFO L124 PetriNetUnfolderBase]: 3280/4945 cut-off events. [2024-06-21 17:50:56,260 INFO L125 PetriNetUnfolderBase]: For 310587/310595 co-relation queries the response was YES. [2024-06-21 17:50:56,304 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. [2024-06-21 17:50:56,325 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 401 selfloop transitions, 96 changer transitions 0/500 dead transitions. [2024-06-21 17:50:56,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 500 transitions, 8979 flow [2024-06-21 17:50:56,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:50:56,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:50:56,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-21 17:50:56,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4175 [2024-06-21 17:50:56,326 INFO L175 Difference]: Start difference. First operand has 311 places, 462 transitions, 7771 flow. Second operand 10 states and 167 transitions. [2024-06-21 17:50:56,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 500 transitions, 8979 flow [2024-06-21 17:50:57,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 500 transitions, 8849 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 17:50:57,380 INFO L231 Difference]: Finished difference. Result has 314 places, 464 transitions, 7906 flow [2024-06-21 17:50:57,380 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} [2024-06-21 17:50:57,380 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 273 predicate places. [2024-06-21 17:50:57,381 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 464 transitions, 7906 flow [2024-06-21 17:50:57,381 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) [2024-06-21 17:50:57,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:50:57,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:50:57,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 17:50:57,381 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)] === [2024-06-21 17:50:57,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:50:57,381 INFO L85 PathProgramCache]: Analyzing trace with hash 253831724, now seen corresponding path program 9 times [2024-06-21 17:50:57,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:50:57,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397198060] [2024-06-21 17:50:57,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:50:57,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:50:57,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:58,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:50:58,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:58,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397198060] [2024-06-21 17:50:58,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397198060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:58,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:58,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:50:58,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096813044] [2024-06-21 17:50:58,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:58,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:50:58,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:58,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:50:58,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:50:58,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:50:58,203 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) [2024-06-21 17:50:58,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:58,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:50:58,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:50:59,485 INFO L124 PetriNetUnfolderBase]: 3433/5192 cut-off events. [2024-06-21 17:50:59,486 INFO L125 PetriNetUnfolderBase]: For 359920/359928 co-relation queries the response was YES. [2024-06-21 17:50:59,530 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. [2024-06-21 17:50:59,554 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 408 selfloop transitions, 100 changer transitions 0/511 dead transitions. [2024-06-21 17:50:59,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 511 transitions, 9462 flow [2024-06-21 17:50:59,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:50:59,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:50:59,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-21 17:50:59,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325 [2024-06-21 17:50:59,555 INFO L175 Difference]: Start difference. First operand has 314 places, 464 transitions, 7906 flow. Second operand 10 states and 173 transitions. [2024-06-21 17:50:59,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 511 transitions, 9462 flow [2024-06-21 17:51:00,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 511 transitions, 9215 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-21 17:51:00,703 INFO L231 Difference]: Finished difference. Result has 317 places, 469 transitions, 8020 flow [2024-06-21 17:51:00,703 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} [2024-06-21 17:51:00,704 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 276 predicate places. [2024-06-21 17:51:00,704 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 469 transitions, 8020 flow [2024-06-21 17:51:00,704 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) [2024-06-21 17:51:00,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:51:00,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:51:00,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 17:51:00,704 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)] === [2024-06-21 17:51:00,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:51:00,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1807239296, now seen corresponding path program 10 times [2024-06-21 17:51:00,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:51:00,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68540641] [2024-06-21 17:51:00,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:51:00,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:51:00,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:51:01,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:51:01,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:51:01,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68540641] [2024-06-21 17:51:01,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68540641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:51:01,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:51:01,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:51:01,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786405147] [2024-06-21 17:51:01,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:51:01,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:51:01,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:51:01,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:51:01,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:51:01,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:51:01,536 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) [2024-06-21 17:51:01,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:51:01,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:51:01,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:51:02,878 INFO L124 PetriNetUnfolderBase]: 3389/5124 cut-off events. [2024-06-21 17:51:02,878 INFO L125 PetriNetUnfolderBase]: For 365496/365504 co-relation queries the response was YES. [2024-06-21 17:51:02,918 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. [2024-06-21 17:51:02,940 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 402 selfloop transitions, 105 changer transitions 0/510 dead transitions. [2024-06-21 17:51:02,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 510 transitions, 9263 flow [2024-06-21 17:51:02,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:51:02,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:51:02,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-21 17:51:02,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 17:51:02,942 INFO L175 Difference]: Start difference. First operand has 317 places, 469 transitions, 8020 flow. Second operand 10 states and 170 transitions. [2024-06-21 17:51:02,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 510 transitions, 9263 flow [2024-06-21 17:51:04,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 510 transitions, 9018 flow, removed 63 selfloop flow, removed 6 redundant places. [2024-06-21 17:51:04,070 INFO L231 Difference]: Finished difference. Result has 321 places, 470 transitions, 8031 flow [2024-06-21 17:51:04,070 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} [2024-06-21 17:51:04,070 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 280 predicate places. [2024-06-21 17:51:04,071 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 470 transitions, 8031 flow [2024-06-21 17:51:04,071 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) [2024-06-21 17:51:04,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:51:04,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:51:04,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 17:51:04,071 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)] === [2024-06-21 17:51:04,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:51:04,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1807454498, now seen corresponding path program 2 times [2024-06-21 17:51:04,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:51:04,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122092349] [2024-06-21 17:51:04,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:51:04,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:51:04,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:51:04,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:51:04,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:51:04,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122092349] [2024-06-21 17:51:04,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122092349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:51:04,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:51:04,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:51:04,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490144290] [2024-06-21 17:51:04,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:51:04,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:51:04,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:51:04,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:51:04,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:51:04,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:51:04,721 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) [2024-06-21 17:51:04,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:51:04,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:51:04,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:51:05,968 INFO L124 PetriNetUnfolderBase]: 3508/5325 cut-off events. [2024-06-21 17:51:05,968 INFO L125 PetriNetUnfolderBase]: For 381671/381679 co-relation queries the response was YES. [2024-06-21 17:51:06,019 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. [2024-06-21 17:51:06,043 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 404 selfloop transitions, 110 changer transitions 0/517 dead transitions. [2024-06-21 17:51:06,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 517 transitions, 9569 flow [2024-06-21 17:51:06,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:51:06,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:51:06,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-21 17:51:06,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325 [2024-06-21 17:51:06,044 INFO L175 Difference]: Start difference. First operand has 321 places, 470 transitions, 8031 flow. Second operand 10 states and 173 transitions. [2024-06-21 17:51:06,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 517 transitions, 9569 flow [2024-06-21 17:51:07,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 517 transitions, 9360 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 17:51:07,314 INFO L231 Difference]: Finished difference. Result has 323 places, 472 transitions, 8118 flow [2024-06-21 17:51:07,315 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} [2024-06-21 17:51:07,315 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 282 predicate places. [2024-06-21 17:51:07,315 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 472 transitions, 8118 flow [2024-06-21 17:51:07,315 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) [2024-06-21 17:51:07,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:51:07,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:51:07,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 17:51:07,316 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)] === [2024-06-21 17:51:07,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:51:07,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1073613691, now seen corresponding path program 1 times [2024-06-21 17:51:07,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:51:07,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682426809] [2024-06-21 17:51:07,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:51:07,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:51:07,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:51:07,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:51:07,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:51:07,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682426809] [2024-06-21 17:51:07,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682426809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:51:07,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:51:07,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:51:07,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173212658] [2024-06-21 17:51:07,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:51:07,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:51:07,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:51:07,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:51:07,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:51:07,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:51:07,812 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) [2024-06-21 17:51:07,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:51:07,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:51:07,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:51:09,125 INFO L124 PetriNetUnfolderBase]: 3518/5343 cut-off events. [2024-06-21 17:51:09,125 INFO L125 PetriNetUnfolderBase]: For 375632/375636 co-relation queries the response was YES. [2024-06-21 17:51:09,176 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. [2024-06-21 17:51:09,200 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 460 selfloop transitions, 36 changer transitions 0/499 dead transitions. [2024-06-21 17:51:09,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 499 transitions, 9370 flow [2024-06-21 17:51:09,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:51:09,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:51:09,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-21 17:51:09,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 17:51:09,201 INFO L175 Difference]: Start difference. First operand has 323 places, 472 transitions, 8118 flow. Second operand 8 states and 128 transitions. [2024-06-21 17:51:09,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 499 transitions, 9370 flow [2024-06-21 17:51:10,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 499 transitions, 9201 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 17:51:10,477 INFO L231 Difference]: Finished difference. Result has 325 places, 478 transitions, 8110 flow [2024-06-21 17:51:10,477 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} [2024-06-21 17:51:10,477 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 284 predicate places. [2024-06-21 17:51:10,477 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 478 transitions, 8110 flow [2024-06-21 17:51:10,478 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) [2024-06-21 17:51:10,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:51:10,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:51:10,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 17:51:10,478 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)] === [2024-06-21 17:51:10,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:51:10,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1834683540, now seen corresponding path program 11 times [2024-06-21 17:51:10,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:51:10,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580884058] [2024-06-21 17:51:10,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:51:10,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:51:10,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:51:11,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:51:11,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:51:11,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580884058] [2024-06-21 17:51:11,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580884058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:51:11,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:51:11,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:51:11,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118061396] [2024-06-21 17:51:11,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:51:11,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:51:11,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:51:11,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:51:11,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:51:11,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:51:11,394 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) [2024-06-21 17:51:11,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:51:11,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:51:11,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:51:12,652 INFO L124 PetriNetUnfolderBase]: 3535/5370 cut-off events. [2024-06-21 17:51:12,652 INFO L125 PetriNetUnfolderBase]: For 390999/391007 co-relation queries the response was YES. [2024-06-21 17:51:12,709 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. [2024-06-21 17:51:12,735 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 428 selfloop transitions, 84 changer transitions 0/515 dead transitions. [2024-06-21 17:51:12,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 515 transitions, 9384 flow [2024-06-21 17:51:12,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:51:12,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:51:12,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-21 17:51:12,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 17:51:12,736 INFO L175 Difference]: Start difference. First operand has 325 places, 478 transitions, 8110 flow. Second operand 9 states and 144 transitions. [2024-06-21 17:51:12,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 515 transitions, 9384 flow [2024-06-21 17:51:14,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 515 transitions, 9243 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 17:51:14,375 INFO L231 Difference]: Finished difference. Result has 329 places, 482 transitions, 8307 flow [2024-06-21 17:51:14,375 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} [2024-06-21 17:51:14,375 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 288 predicate places. [2024-06-21 17:51:14,375 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 482 transitions, 8307 flow [2024-06-21 17:51:14,376 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) [2024-06-21 17:51:14,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:51:14,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:51:14,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 17:51:14,376 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)] === [2024-06-21 17:51:14,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:51:14,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1832805870, now seen corresponding path program 12 times [2024-06-21 17:51:14,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:51:14,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906796879] [2024-06-21 17:51:14,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:51:14,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:51:14,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:51:15,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:51:15,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:51:15,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906796879] [2024-06-21 17:51:15,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906796879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:51:15,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:51:15,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:51:15,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116525773] [2024-06-21 17:51:15,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:51:15,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:51:15,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:51:15,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:51:15,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:51:15,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:51:15,313 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) [2024-06-21 17:51:15,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:51:15,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:51:15,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:51:16,694 INFO L124 PetriNetUnfolderBase]: 3552/5405 cut-off events. [2024-06-21 17:51:16,695 INFO L125 PetriNetUnfolderBase]: For 401171/401175 co-relation queries the response was YES. [2024-06-21 17:51:16,749 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. [2024-06-21 17:51:16,775 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 408 selfloop transitions, 106 changer transitions 0/517 dead transitions. [2024-06-21 17:51:16,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 517 transitions, 9551 flow [2024-06-21 17:51:16,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:51:16,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:51:16,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-21 17:51:16,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40555555555555556 [2024-06-21 17:51:16,777 INFO L175 Difference]: Start difference. First operand has 329 places, 482 transitions, 8307 flow. Second operand 9 states and 146 transitions. [2024-06-21 17:51:16,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 517 transitions, 9551 flow [2024-06-21 17:51:18,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 517 transitions, 9361 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-21 17:51:18,242 INFO L231 Difference]: Finished difference. Result has 333 places, 484 transitions, 8429 flow [2024-06-21 17:51:18,243 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} [2024-06-21 17:51:18,243 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 292 predicate places. [2024-06-21 17:51:18,243 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 484 transitions, 8429 flow [2024-06-21 17:51:18,244 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) [2024-06-21 17:51:18,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:51:18,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:51:18,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 17:51:18,244 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)] === [2024-06-21 17:51:18,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:51:18,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1832809590, now seen corresponding path program 13 times [2024-06-21 17:51:18,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:51:18,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376401531] [2024-06-21 17:51:18,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:51:18,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:51:18,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:51:19,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:51:19,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:51:19,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376401531] [2024-06-21 17:51:19,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376401531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:51:19,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:51:19,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:51:19,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361886226] [2024-06-21 17:51:19,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:51:19,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:51:19,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:51:19,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:51:19,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:51:19,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:51:19,167 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) [2024-06-21 17:51:19,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:51:19,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:51:19,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:51:20,555 INFO L124 PetriNetUnfolderBase]: 3569/5428 cut-off events. [2024-06-21 17:51:20,555 INFO L125 PetriNetUnfolderBase]: For 375185/375189 co-relation queries the response was YES. [2024-06-21 17:51:20,608 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. [2024-06-21 17:51:20,633 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 408 selfloop transitions, 110 changer transitions 0/521 dead transitions. [2024-06-21 17:51:20,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 521 transitions, 9711 flow [2024-06-21 17:51:20,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:51:20,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:51:20,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-21 17:51:20,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-06-21 17:51:20,635 INFO L175 Difference]: Start difference. First operand has 333 places, 484 transitions, 8429 flow. Second operand 9 states and 147 transitions. [2024-06-21 17:51:20,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 521 transitions, 9711 flow [2024-06-21 17:51:22,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 521 transitions, 9465 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-21 17:51:22,183 INFO L231 Difference]: Finished difference. Result has 336 places, 488 transitions, 8571 flow [2024-06-21 17:51:22,184 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} [2024-06-21 17:51:22,184 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 295 predicate places. [2024-06-21 17:51:22,184 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 488 transitions, 8571 flow [2024-06-21 17:51:22,184 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) [2024-06-21 17:51:22,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:51:22,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:51:22,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 17:51:22,185 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)] === [2024-06-21 17:51:22,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:51:22,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1745963958, now seen corresponding path program 3 times [2024-06-21 17:51:22,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:51:22,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908141021] [2024-06-21 17:51:22,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:51:22,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:51:22,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:51:22,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:51:22,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:51:22,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908141021] [2024-06-21 17:51:22,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908141021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:51:22,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:51:22,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:51:22,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061922456] [2024-06-21 17:51:22,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:51:22,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:51:22,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:51:22,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:51:22,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:51:22,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:51:22,930 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) [2024-06-21 17:51:22,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:51:22,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:51:22,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:51:24,365 INFO L124 PetriNetUnfolderBase]: 3644/5545 cut-off events. [2024-06-21 17:51:24,365 INFO L125 PetriNetUnfolderBase]: For 415545/415553 co-relation queries the response was YES. [2024-06-21 17:51:24,415 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. [2024-06-21 17:51:24,439 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 384 selfloop transitions, 138 changer transitions 0/525 dead transitions. [2024-06-21 17:51:24,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 525 transitions, 9833 flow [2024-06-21 17:51:24,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:51:24,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:51:24,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-21 17:51:24,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2024-06-21 17:51:24,441 INFO L175 Difference]: Start difference. First operand has 336 places, 488 transitions, 8571 flow. Second operand 9 states and 152 transitions. [2024-06-21 17:51:24,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 525 transitions, 9833 flow [2024-06-21 17:51:25,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 525 transitions, 9634 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-21 17:51:25,530 INFO L231 Difference]: Finished difference. Result has 339 places, 489 transitions, 8702 flow [2024-06-21 17:51:25,531 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} [2024-06-21 17:51:25,531 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 298 predicate places. [2024-06-21 17:51:25,531 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 489 transitions, 8702 flow [2024-06-21 17:51:25,531 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) [2024-06-21 17:51:25,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:51:25,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:51:25,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 17:51:25,532 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)] === [2024-06-21 17:51:25,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:51:25,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1827912210, now seen corresponding path program 14 times [2024-06-21 17:51:25,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:51:25,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232613889] [2024-06-21 17:51:25,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:51:25,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:51:25,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:51:26,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:51:26,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:51:26,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232613889] [2024-06-21 17:51:26,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232613889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:51:26,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:51:26,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:51:26,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605946968] [2024-06-21 17:51:26,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:51:26,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:51:26,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:51:26,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:51:26,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:51:26,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:51:26,366 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) [2024-06-21 17:51:26,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:51:26,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:51:26,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:51:27,825 INFO L124 PetriNetUnfolderBase]: 3661/5572 cut-off events. [2024-06-21 17:51:27,826 INFO L125 PetriNetUnfolderBase]: For 380889/380897 co-relation queries the response was YES. [2024-06-21 17:51:27,876 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. [2024-06-21 17:51:27,899 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 398 selfloop transitions, 122 changer transitions 0/523 dead transitions. [2024-06-21 17:51:27,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 523 transitions, 9956 flow [2024-06-21 17:51:27,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:51:27,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:51:27,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 17:51:27,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 17:51:27,900 INFO L175 Difference]: Start difference. First operand has 339 places, 489 transitions, 8702 flow. Second operand 9 states and 150 transitions. [2024-06-21 17:51:27,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 523 transitions, 9956 flow [2024-06-21 17:51:28,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 523 transitions, 9674 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 17:51:28,994 INFO L231 Difference]: Finished difference. Result has 341 places, 491 transitions, 8752 flow [2024-06-21 17:51:28,994 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} [2024-06-21 17:51:28,995 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 300 predicate places. [2024-06-21 17:51:28,995 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 491 transitions, 8752 flow [2024-06-21 17:51:28,995 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) [2024-06-21 17:51:28,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:51:28,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:51:28,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 17:51:28,995 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)] === [2024-06-21 17:51:28,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:51:28,996 INFO L85 PathProgramCache]: Analyzing trace with hash 571018790, now seen corresponding path program 15 times [2024-06-21 17:51:28,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:51:28,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675233793] [2024-06-21 17:51:28,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:51:28,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:51:29,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:51:29,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:51:29,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:51:29,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675233793] [2024-06-21 17:51:29,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675233793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:51:29,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:51:29,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:51:29,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324101562] [2024-06-21 17:51:29,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:51:29,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:51:29,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:51:29,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:51:29,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:51:29,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:51:29,891 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) [2024-06-21 17:51:29,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:51:29,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:51:29,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:51:31,429 INFO L124 PetriNetUnfolderBase]: 3814/5819 cut-off events. [2024-06-21 17:51:31,429 INFO L125 PetriNetUnfolderBase]: For 437707/437715 co-relation queries the response was YES. [2024-06-21 17:51:31,484 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. [2024-06-21 17:51:31,512 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 400 selfloop transitions, 131 changer transitions 0/534 dead transitions. [2024-06-21 17:51:31,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 534 transitions, 10380 flow [2024-06-21 17:51:31,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:51:31,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:51:31,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 17:51:31,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-21 17:51:31,514 INFO L175 Difference]: Start difference. First operand has 341 places, 491 transitions, 8752 flow. Second operand 9 states and 156 transitions. [2024-06-21 17:51:31,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 534 transitions, 10380 flow [2024-06-21 17:51:32,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 534 transitions, 10082 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-21 17:51:32,771 INFO L231 Difference]: Finished difference. Result has 344 places, 496 transitions, 8915 flow [2024-06-21 17:51:32,772 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} [2024-06-21 17:51:32,772 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 303 predicate places. [2024-06-21 17:51:32,772 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 496 transitions, 8915 flow [2024-06-21 17:51:32,772 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) [2024-06-21 17:51:32,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:51:32,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:51:32,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 17:51:32,773 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)] === [2024-06-21 17:51:32,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:51:32,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1259041496, now seen corresponding path program 16 times [2024-06-21 17:51:32,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:51:32,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289746990] [2024-06-21 17:51:32,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:51:32,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:51:32,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:51:33,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:51:33,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:51:33,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289746990] [2024-06-21 17:51:33,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289746990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:51:33,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:51:33,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:51:33,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831652386] [2024-06-21 17:51:33,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:51:33,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:51:33,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:51:33,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:51:33,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:51:33,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:51:33,767 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) [2024-06-21 17:51:33,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:51:33,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:51:33,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:51:35,265 INFO L124 PetriNetUnfolderBase]: 3770/5751 cut-off events. [2024-06-21 17:51:35,265 INFO L125 PetriNetUnfolderBase]: For 443706/443714 co-relation queries the response was YES. [2024-06-21 17:51:35,317 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. [2024-06-21 17:51:35,341 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 398 selfloop transitions, 132 changer transitions 0/533 dead transitions. [2024-06-21 17:51:35,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 533 transitions, 10200 flow [2024-06-21 17:51:35,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:51:35,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:51:35,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 17:51:35,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 17:51:35,342 INFO L175 Difference]: Start difference. First operand has 344 places, 496 transitions, 8915 flow. Second operand 9 states and 153 transitions. [2024-06-21 17:51:35,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 533 transitions, 10200 flow [2024-06-21 17:51:36,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 533 transitions, 9911 flow, removed 71 selfloop flow, removed 6 redundant places. [2024-06-21 17:51:36,716 INFO L231 Difference]: Finished difference. Result has 347 places, 497 transitions, 8949 flow [2024-06-21 17:51:36,716 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} [2024-06-21 17:51:36,717 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 306 predicate places. [2024-06-21 17:51:36,717 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 497 transitions, 8949 flow [2024-06-21 17:51:36,717 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) [2024-06-21 17:51:36,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:51:36,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:51:36,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 17:51:36,718 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)] === [2024-06-21 17:51:36,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:51:36,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1220305428, now seen corresponding path program 4 times [2024-06-21 17:51:36,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:51:36,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009072065] [2024-06-21 17:51:36,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:51:36,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:51:36,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:51:37,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:51:37,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:51:37,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009072065] [2024-06-21 17:51:37,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009072065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:51:37,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:51:37,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:51:37,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504797377] [2024-06-21 17:51:37,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:51:37,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:51:37,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:51:37,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:51:37,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:51:37,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:51:37,437 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) [2024-06-21 17:51:37,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:51:37,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:51:37,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:51:39,025 INFO L124 PetriNetUnfolderBase]: 3889/5952 cut-off events. [2024-06-21 17:51:39,026 INFO L125 PetriNetUnfolderBase]: For 449702/449710 co-relation queries the response was YES. [2024-06-21 17:51:39,086 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. [2024-06-21 17:51:39,118 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 397 selfloop transitions, 140 changer transitions 0/540 dead transitions. [2024-06-21 17:51:39,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 540 transitions, 10547 flow [2024-06-21 17:51:39,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:51:39,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:51:39,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 17:51:39,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-21 17:51:39,119 INFO L175 Difference]: Start difference. First operand has 347 places, 497 transitions, 8949 flow. Second operand 9 states and 156 transitions. [2024-06-21 17:51:39,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 540 transitions, 10547 flow [2024-06-21 17:51:40,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 540 transitions, 10285 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 17:51:40,535 INFO L231 Difference]: Finished difference. Result has 349 places, 499 transitions, 9061 flow [2024-06-21 17:51:40,535 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} [2024-06-21 17:51:40,536 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 308 predicate places. [2024-06-21 17:51:40,536 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 499 transitions, 9061 flow [2024-06-21 17:51:40,536 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) [2024-06-21 17:51:40,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:51:40,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:51:40,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 17:51:40,537 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)] === [2024-06-21 17:51:40,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:51:40,537 INFO L85 PathProgramCache]: Analyzing trace with hash 2078616529, now seen corresponding path program 2 times [2024-06-21 17:51:40,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:51:40,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674333811] [2024-06-21 17:51:40,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:51:40,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:51:40,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:51:41,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:51:41,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:51:41,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674333811] [2024-06-21 17:51:41,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674333811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:51:41,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:51:41,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:51:41,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571182825] [2024-06-21 17:51:41,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:51:41,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:51:41,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:51:41,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:51:41,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:51:41,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:51:41,144 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) [2024-06-21 17:51:41,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:51:41,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:51:41,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:51:42,546 INFO L124 PetriNetUnfolderBase]: 3904/5977 cut-off events. [2024-06-21 17:51:42,546 INFO L125 PetriNetUnfolderBase]: For 443817/443821 co-relation queries the response was YES. [2024-06-21 17:51:42,608 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. [2024-06-21 17:51:42,634 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 478 selfloop transitions, 41 changer transitions 0/522 dead transitions. [2024-06-21 17:51:42,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 522 transitions, 10364 flow [2024-06-21 17:51:42,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:51:42,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:51:42,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-21 17:51:42,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2024-06-21 17:51:42,636 INFO L175 Difference]: Start difference. First operand has 349 places, 499 transitions, 9061 flow. Second operand 7 states and 113 transitions. [2024-06-21 17:51:42,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 522 transitions, 10364 flow [2024-06-21 17:51:43,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 522 transitions, 10162 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 17:51:43,960 INFO L231 Difference]: Finished difference. Result has 351 places, 505 transitions, 9054 flow [2024-06-21 17:51:43,960 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} [2024-06-21 17:51:43,961 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 310 predicate places. [2024-06-21 17:51:43,961 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 505 transitions, 9054 flow [2024-06-21 17:51:43,961 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) [2024-06-21 17:51:43,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:51:43,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:51:43,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 17:51:43,961 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)] === [2024-06-21 17:51:43,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:51:43,962 INFO L85 PathProgramCache]: Analyzing trace with hash -210327370, now seen corresponding path program 5 times [2024-06-21 17:51:43,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:51:43,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757106118] [2024-06-21 17:51:43,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:51:43,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:51:43,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:51:44,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:51:44,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:51:44,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757106118] [2024-06-21 17:51:44,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757106118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:51:44,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:51:44,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:51:44,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543058151] [2024-06-21 17:51:44,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:51:44,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:51:44,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:51:44,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:51:44,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:51:44,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:51:44,743 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) [2024-06-21 17:51:44,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:51:44,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:51:44,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:51:46,173 INFO L124 PetriNetUnfolderBase]: 4048/6217 cut-off events. [2024-06-21 17:51:46,174 INFO L125 PetriNetUnfolderBase]: For 490597/490607 co-relation queries the response was YES. [2024-06-21 17:51:46,242 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. [2024-06-21 17:51:46,272 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 365 selfloop transitions, 180 changer transitions 0/548 dead transitions. [2024-06-21 17:51:46,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 548 transitions, 10710 flow [2024-06-21 17:51:46,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:51:46,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:51:46,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 17:51:46,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4361111111111111 [2024-06-21 17:51:46,274 INFO L175 Difference]: Start difference. First operand has 351 places, 505 transitions, 9054 flow. Second operand 9 states and 157 transitions. [2024-06-21 17:51:46,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 548 transitions, 10710 flow [2024-06-21 17:51:47,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 548 transitions, 10624 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-21 17:51:47,915 INFO L231 Difference]: Finished difference. Result has 356 places, 507 transitions, 9426 flow [2024-06-21 17:51:47,916 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} [2024-06-21 17:51:47,916 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 315 predicate places. [2024-06-21 17:51:47,916 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 507 transitions, 9426 flow [2024-06-21 17:51:47,917 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) [2024-06-21 17:51:47,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:51:47,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:51:47,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 17:51:47,917 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)] === [2024-06-21 17:51:47,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:51:47,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1994782930, now seen corresponding path program 6 times [2024-06-21 17:51:47,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:51:47,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617612788] [2024-06-21 17:51:47,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:51:47,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:51:47,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:51:48,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:51:48,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:51:48,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617612788] [2024-06-21 17:51:48,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617612788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:51:48,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:51:48,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:51:48,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921883233] [2024-06-21 17:51:48,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:51:48,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:51:48,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:51:48,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:51:48,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:51:48,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:51:48,590 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) [2024-06-21 17:51:48,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:51:48,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:51:48,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:51:50,218 INFO L124 PetriNetUnfolderBase]: 4140/6369 cut-off events. [2024-06-21 17:51:50,218 INFO L125 PetriNetUnfolderBase]: For 519949/519959 co-relation queries the response was YES. [2024-06-21 17:51:50,289 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. [2024-06-21 17:51:50,321 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 377 selfloop transitions, 164 changer transitions 0/544 dead transitions. [2024-06-21 17:51:50,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 544 transitions, 10776 flow [2024-06-21 17:51:50,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:51:50,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:51:50,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 17:51:50,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-21 17:51:50,323 INFO L175 Difference]: Start difference. First operand has 356 places, 507 transitions, 9426 flow. Second operand 9 states and 156 transitions. [2024-06-21 17:51:50,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 544 transitions, 10776 flow [2024-06-21 17:51:51,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 544 transitions, 10537 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 17:51:51,981 INFO L231 Difference]: Finished difference. Result has 360 places, 509 transitions, 9614 flow [2024-06-21 17:51:51,981 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} [2024-06-21 17:51:51,981 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 319 predicate places. [2024-06-21 17:51:51,981 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 509 transitions, 9614 flow [2024-06-21 17:51:51,982 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) [2024-06-21 17:51:51,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:51:51,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:51:51,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 17:51:51,982 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)] === [2024-06-21 17:51:51,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:51:51,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1024558954, now seen corresponding path program 7 times [2024-06-21 17:51:51,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:51:51,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408424006] [2024-06-21 17:51:51,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:51:51,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:51:51,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:51:52,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:51:52,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:51:52,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408424006] [2024-06-21 17:51:52,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408424006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:51:52,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:51:52,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:51:52,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035975003] [2024-06-21 17:51:52,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:51:52,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:51:52,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:51:52,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:51:52,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:51:52,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:51:52,671 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) [2024-06-21 17:51:52,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:51:52,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:51:52,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:51:54,374 INFO L124 PetriNetUnfolderBase]: 4309/6648 cut-off events. [2024-06-21 17:51:54,374 INFO L125 PetriNetUnfolderBase]: For 561138/561148 co-relation queries the response was YES. [2024-06-21 17:51:54,444 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. [2024-06-21 17:51:54,475 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 385 selfloop transitions, 163 changer transitions 0/551 dead transitions. [2024-06-21 17:51:54,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 551 transitions, 11250 flow [2024-06-21 17:51:54,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:51:54,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:51:54,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 17:51:54,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-21 17:51:54,477 INFO L175 Difference]: Start difference. First operand has 360 places, 509 transitions, 9614 flow. Second operand 9 states and 159 transitions. [2024-06-21 17:51:54,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 551 transitions, 11250 flow [2024-06-21 17:51:56,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 551 transitions, 10863 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-21 17:51:56,264 INFO L231 Difference]: Finished difference. Result has 362 places, 511 transitions, 9653 flow [2024-06-21 17:51:56,265 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} [2024-06-21 17:51:56,265 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 321 predicate places. [2024-06-21 17:51:56,265 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 511 transitions, 9653 flow [2024-06-21 17:51:56,265 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) [2024-06-21 17:51:56,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:51:56,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:51:56,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 17:51:56,266 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)] === [2024-06-21 17:51:56,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:51:56,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1281268714, now seen corresponding path program 8 times [2024-06-21 17:51:56,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:51:56,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607402187] [2024-06-21 17:51:56,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:51:56,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:51:56,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:51:56,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:51:56,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:51:56,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607402187] [2024-06-21 17:51:56,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607402187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:51:57,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:51:57,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:51:57,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424268073] [2024-06-21 17:51:57,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:51:57,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:51:57,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:51:57,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:51:57,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:51:57,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:51:57,074 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) [2024-06-21 17:51:57,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:51:57,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:51:57,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:51:58,868 INFO L124 PetriNetUnfolderBase]: 4351/6722 cut-off events. [2024-06-21 17:51:58,869 INFO L125 PetriNetUnfolderBase]: For 567091/567101 co-relation queries the response was YES. [2024-06-21 17:51:58,933 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. [2024-06-21 17:51:58,959 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 396 selfloop transitions, 150 changer transitions 0/549 dead transitions. [2024-06-21 17:51:58,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 549 transitions, 10992 flow [2024-06-21 17:51:58,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:51:58,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:51:58,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 17:51:58,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-06-21 17:51:58,961 INFO L175 Difference]: Start difference. First operand has 362 places, 511 transitions, 9653 flow. Second operand 9 states and 154 transitions. [2024-06-21 17:51:58,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 549 transitions, 10992 flow [2024-06-21 17:52:00,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 549 transitions, 10726 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-21 17:52:00,586 INFO L231 Difference]: Finished difference. Result has 366 places, 514 transitions, 9768 flow [2024-06-21 17:52:00,587 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} [2024-06-21 17:52:00,587 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 325 predicate places. [2024-06-21 17:52:00,587 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 514 transitions, 9768 flow [2024-06-21 17:52:00,587 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) [2024-06-21 17:52:00,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:00,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:00,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 17:52:00,588 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)] === [2024-06-21 17:52:00,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:00,588 INFO L85 PathProgramCache]: Analyzing trace with hash 243724276, now seen corresponding path program 17 times [2024-06-21 17:52:00,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:00,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048653518] [2024-06-21 17:52:00,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:00,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:00,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:01,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:01,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:01,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048653518] [2024-06-21 17:52:01,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048653518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:01,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:01,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:52:01,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790306073] [2024-06-21 17:52:01,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:01,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:52:01,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:01,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:52:01,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:52:01,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:52:01,402 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) [2024-06-21 17:52:01,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:01,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:52:01,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:03,263 INFO L124 PetriNetUnfolderBase]: 4443/6874 cut-off events. [2024-06-21 17:52:03,264 INFO L125 PetriNetUnfolderBase]: For 589585/589595 co-relation queries the response was YES. [2024-06-21 17:52:03,329 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. [2024-06-21 17:52:03,356 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 401 selfloop transitions, 147 changer transitions 0/551 dead transitions. [2024-06-21 17:52:03,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 551 transitions, 11136 flow [2024-06-21 17:52:03,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:52:03,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:52:03,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 17:52:03,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4388888888888889 [2024-06-21 17:52:03,358 INFO L175 Difference]: Start difference. First operand has 366 places, 514 transitions, 9768 flow. Second operand 9 states and 158 transitions. [2024-06-21 17:52:03,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 551 transitions, 11136 flow [2024-06-21 17:52:05,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 551 transitions, 10826 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 17:52:05,073 INFO L231 Difference]: Finished difference. Result has 368 places, 516 transitions, 9855 flow [2024-06-21 17:52:05,074 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} [2024-06-21 17:52:05,074 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 327 predicate places. [2024-06-21 17:52:05,074 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 516 transitions, 9855 flow [2024-06-21 17:52:05,075 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) [2024-06-21 17:52:05,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:05,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:05,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 17:52:05,075 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)] === [2024-06-21 17:52:05,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:05,076 INFO L85 PathProgramCache]: Analyzing trace with hash 243939478, now seen corresponding path program 9 times [2024-06-21 17:52:05,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:05,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721954467] [2024-06-21 17:52:05,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:05,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:05,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:05,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:05,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:05,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721954467] [2024-06-21 17:52:05,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721954467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:05,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:05,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:52:05,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109900010] [2024-06-21 17:52:05,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:05,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:52:05,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:05,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:52:05,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:52:05,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:52:05,873 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) [2024-06-21 17:52:05,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:05,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:52:05,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:07,839 INFO L124 PetriNetUnfolderBase]: 4501/6972 cut-off events. [2024-06-21 17:52:07,839 INFO L125 PetriNetUnfolderBase]: For 596998/597008 co-relation queries the response was YES. [2024-06-21 17:52:07,909 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. [2024-06-21 17:52:07,944 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 408 selfloop transitions, 147 changer transitions 0/558 dead transitions. [2024-06-21 17:52:07,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 558 transitions, 11519 flow [2024-06-21 17:52:07,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:52:07,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:52:07,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 17:52:07,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44722222222222224 [2024-06-21 17:52:07,946 INFO L175 Difference]: Start difference. First operand has 368 places, 516 transitions, 9855 flow. Second operand 9 states and 161 transitions. [2024-06-21 17:52:07,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 558 transitions, 11519 flow [2024-06-21 17:52:09,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 558 transitions, 11160 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-21 17:52:09,723 INFO L231 Difference]: Finished difference. Result has 370 places, 517 transitions, 9846 flow [2024-06-21 17:52:09,723 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} [2024-06-21 17:52:09,724 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 329 predicate places. [2024-06-21 17:52:09,724 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 517 transitions, 9846 flow [2024-06-21 17:52:09,724 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) [2024-06-21 17:52:09,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:09,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:09,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 17:52:09,725 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)] === [2024-06-21 17:52:09,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:09,725 INFO L85 PathProgramCache]: Analyzing trace with hash 243730228, now seen corresponding path program 10 times [2024-06-21 17:52:09,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:09,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247128718] [2024-06-21 17:52:09,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:09,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:09,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:10,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:10,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:10,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247128718] [2024-06-21 17:52:10,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247128718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:10,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:10,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:52:10,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806337728] [2024-06-21 17:52:10,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:10,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:52:10,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:10,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:52:10,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:52:10,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:52:10,618 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) [2024-06-21 17:52:10,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:10,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:52:10,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:12,376 INFO L124 PetriNetUnfolderBase]: 4526/7019 cut-off events. [2024-06-21 17:52:12,376 INFO L125 PetriNetUnfolderBase]: For 601630/601640 co-relation queries the response was YES. [2024-06-21 17:52:12,457 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. [2024-06-21 17:52:12,489 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 416 selfloop transitions, 134 changer transitions 0/553 dead transitions. [2024-06-21 17:52:12,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 553 transitions, 11180 flow [2024-06-21 17:52:12,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:52:12,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:52:12,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 17:52:12,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-06-21 17:52:12,490 INFO L175 Difference]: Start difference. First operand has 370 places, 517 transitions, 9846 flow. Second operand 9 states and 155 transitions. [2024-06-21 17:52:12,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 553 transitions, 11180 flow [2024-06-21 17:52:14,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 553 transitions, 10573 flow, removed 29 selfloop flow, removed 9 redundant places. [2024-06-21 17:52:14,324 INFO L231 Difference]: Finished difference. Result has 370 places, 518 transitions, 9571 flow [2024-06-21 17:52:14,325 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} [2024-06-21 17:52:14,325 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 329 predicate places. [2024-06-21 17:52:14,325 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 518 transitions, 9571 flow [2024-06-21 17:52:14,325 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) [2024-06-21 17:52:14,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:14,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:14,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 17:52:14,326 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)] === [2024-06-21 17:52:14,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:14,326 INFO L85 PathProgramCache]: Analyzing trace with hash 238217746, now seen corresponding path program 18 times [2024-06-21 17:52:14,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:14,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444323807] [2024-06-21 17:52:14,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:14,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:14,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:15,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:15,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:15,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444323807] [2024-06-21 17:52:15,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444323807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:15,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:15,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:52:15,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269530411] [2024-06-21 17:52:15,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:15,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:52:15,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:15,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:52:15,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:52:15,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:52:15,295 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) [2024-06-21 17:52:15,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:15,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:52:15,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:16,972 INFO L124 PetriNetUnfolderBase]: 4518/7007 cut-off events. [2024-06-21 17:52:16,972 INFO L125 PetriNetUnfolderBase]: For 568042/568052 co-relation queries the response was YES. [2024-06-21 17:52:17,054 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. [2024-06-21 17:52:17,087 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 396 selfloop transitions, 152 changer transitions 0/551 dead transitions. [2024-06-21 17:52:17,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 551 transitions, 10895 flow [2024-06-21 17:52:17,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:52:17,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:52:17,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 17:52:17,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 17:52:17,089 INFO L175 Difference]: Start difference. First operand has 370 places, 518 transitions, 9571 flow. Second operand 9 states and 153 transitions. [2024-06-21 17:52:17,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 551 transitions, 10895 flow [2024-06-21 17:52:18,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 551 transitions, 10598 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-21 17:52:19,003 INFO L231 Difference]: Finished difference. Result has 371 places, 520 transitions, 9677 flow [2024-06-21 17:52:19,003 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} [2024-06-21 17:52:19,003 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 330 predicate places. [2024-06-21 17:52:19,003 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 520 transitions, 9677 flow [2024-06-21 17:52:19,004 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) [2024-06-21 17:52:19,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:19,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:19,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 17:52:19,004 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)] === [2024-06-21 17:52:19,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:19,004 INFO L85 PathProgramCache]: Analyzing trace with hash 238214026, now seen corresponding path program 19 times [2024-06-21 17:52:19,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:19,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606488239] [2024-06-21 17:52:19,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:19,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:19,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:19,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:19,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:19,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606488239] [2024-06-21 17:52:19,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606488239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:19,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:19,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:52:19,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726042720] [2024-06-21 17:52:19,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:19,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:52:19,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:19,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:52:19,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:52:20,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:52:20,001 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) [2024-06-21 17:52:20,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:20,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:52:20,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:21,674 INFO L124 PetriNetUnfolderBase]: 4510/6995 cut-off events. [2024-06-21 17:52:21,674 INFO L125 PetriNetUnfolderBase]: For 559366/559376 co-relation queries the response was YES. [2024-06-21 17:52:21,755 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. [2024-06-21 17:52:21,786 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 397 selfloop transitions, 159 changer transitions 0/559 dead transitions. [2024-06-21 17:52:21,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 559 transitions, 11105 flow [2024-06-21 17:52:21,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:52:21,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:52:21,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 17:52:21,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4361111111111111 [2024-06-21 17:52:21,788 INFO L175 Difference]: Start difference. First operand has 371 places, 520 transitions, 9677 flow. Second operand 9 states and 157 transitions. [2024-06-21 17:52:21,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 559 transitions, 11105 flow [2024-06-21 17:52:23,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 559 transitions, 10722 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-21 17:52:23,567 INFO L231 Difference]: Finished difference. Result has 374 places, 524 transitions, 9779 flow [2024-06-21 17:52:23,567 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} [2024-06-21 17:52:23,568 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 333 predicate places. [2024-06-21 17:52:23,568 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 524 transitions, 9779 flow [2024-06-21 17:52:23,568 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) [2024-06-21 17:52:23,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:23,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:23,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 17:52:23,569 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)] === [2024-06-21 17:52:23,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:23,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1865060957, now seen corresponding path program 3 times [2024-06-21 17:52:23,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:23,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966634534] [2024-06-21 17:52:23,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:23,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:23,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:24,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:24,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:24,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966634534] [2024-06-21 17:52:24,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966634534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:24,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:24,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:52:24,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3810086] [2024-06-21 17:52:24,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:24,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:52:24,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:24,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:52:24,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:52:24,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:52:24,052 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) [2024-06-21 17:52:24,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:24,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:52:24,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:25,852 INFO L124 PetriNetUnfolderBase]: 4520/7009 cut-off events. [2024-06-21 17:52:25,852 INFO L125 PetriNetUnfolderBase]: For 569797/569801 co-relation queries the response was YES. [2024-06-21 17:52:25,922 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. [2024-06-21 17:52:25,953 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 497 selfloop transitions, 43 changer transitions 0/543 dead transitions. [2024-06-21 17:52:25,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 543 transitions, 11094 flow [2024-06-21 17:52:25,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:52:25,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:52:25,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-21 17:52:25,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 17:52:25,955 INFO L175 Difference]: Start difference. First operand has 374 places, 524 transitions, 9779 flow. Second operand 6 states and 102 transitions. [2024-06-21 17:52:25,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 543 transitions, 11094 flow [2024-06-21 17:52:28,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 543 transitions, 10788 flow, removed 64 selfloop flow, removed 5 redundant places. [2024-06-21 17:52:28,059 INFO L231 Difference]: Finished difference. Result has 375 places, 527 transitions, 9619 flow [2024-06-21 17:52:28,060 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} [2024-06-21 17:52:28,060 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 334 predicate places. [2024-06-21 17:52:28,060 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 527 transitions, 9619 flow [2024-06-21 17:52:28,060 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) [2024-06-21 17:52:28,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:28,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:28,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 17:52:28,061 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)] === [2024-06-21 17:52:28,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:28,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1144298867, now seen corresponding path program 4 times [2024-06-21 17:52:28,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:28,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660534380] [2024-06-21 17:52:28,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:28,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:28,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:28,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:28,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:28,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660534380] [2024-06-21 17:52:28,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660534380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:28,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:28,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:52:28,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241383873] [2024-06-21 17:52:28,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:28,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:52:28,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:28,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:52:28,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:52:28,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:52:28,652 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) [2024-06-21 17:52:28,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:28,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:52:28,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:30,286 INFO L124 PetriNetUnfolderBase]: 4514/7001 cut-off events. [2024-06-21 17:52:30,286 INFO L125 PetriNetUnfolderBase]: For 568813/568817 co-relation queries the response was YES. [2024-06-21 17:52:30,364 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. [2024-06-21 17:52:30,396 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 503 selfloop transitions, 34 changer transitions 0/540 dead transitions. [2024-06-21 17:52:30,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 540 transitions, 10745 flow [2024-06-21 17:52:30,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:52:30,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:52:30,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-21 17:52:30,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445 [2024-06-21 17:52:30,397 INFO L175 Difference]: Start difference. First operand has 375 places, 527 transitions, 9619 flow. Second operand 5 states and 89 transitions. [2024-06-21 17:52:30,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 540 transitions, 10745 flow [2024-06-21 17:52:32,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 540 transitions, 10638 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-21 17:52:32,486 INFO L231 Difference]: Finished difference. Result has 376 places, 527 transitions, 9609 flow [2024-06-21 17:52:32,486 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} [2024-06-21 17:52:32,486 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 335 predicate places. [2024-06-21 17:52:32,486 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 527 transitions, 9609 flow [2024-06-21 17:52:32,486 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) [2024-06-21 17:52:32,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:32,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:32,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 17:52:32,487 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)] === [2024-06-21 17:52:32,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:32,487 INFO L85 PathProgramCache]: Analyzing trace with hash -2039154891, now seen corresponding path program 1 times [2024-06-21 17:52:32,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:32,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270237354] [2024-06-21 17:52:32,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:32,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:32,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:32,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:32,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:32,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270237354] [2024-06-21 17:52:32,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270237354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:32,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:32,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:52:32,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899374680] [2024-06-21 17:52:32,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:32,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:52:32,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:32,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:52:32,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:52:33,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:52:33,035 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) [2024-06-21 17:52:33,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:33,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:52:33,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:34,649 INFO L124 PetriNetUnfolderBase]: 4427/6932 cut-off events. [2024-06-21 17:52:34,649 INFO L125 PetriNetUnfolderBase]: For 604601/604628 co-relation queries the response was YES. [2024-06-21 17:52:34,739 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. [2024-06-21 17:52:34,773 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 465 selfloop transitions, 26 changer transitions 0/552 dead transitions. [2024-06-21 17:52:34,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 552 transitions, 10935 flow [2024-06-21 17:52:34,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:52:34,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:52:34,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 17:52:34,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-21 17:52:34,774 INFO L175 Difference]: Start difference. First operand has 376 places, 527 transitions, 9609 flow. Second operand 7 states and 118 transitions. [2024-06-21 17:52:34,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 552 transitions, 10935 flow [2024-06-21 17:52:36,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 552 transitions, 10867 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 17:52:36,836 INFO L231 Difference]: Finished difference. Result has 379 places, 533 transitions, 9741 flow [2024-06-21 17:52:36,837 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} [2024-06-21 17:52:36,837 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 338 predicate places. [2024-06-21 17:52:36,837 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 533 transitions, 9741 flow [2024-06-21 17:52:36,837 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) [2024-06-21 17:52:36,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:36,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:36,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 17:52:36,838 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)] === [2024-06-21 17:52:36,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:36,838 INFO L85 PathProgramCache]: Analyzing trace with hash -361056873, now seen corresponding path program 1 times [2024-06-21 17:52:36,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:36,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62818611] [2024-06-21 17:52:36,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:36,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:36,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:37,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:37,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:37,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62818611] [2024-06-21 17:52:37,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62818611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:37,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:37,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:52:37,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506096533] [2024-06-21 17:52:37,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:37,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:52:37,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:37,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:52:37,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:52:37,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:52:37,446 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) [2024-06-21 17:52:37,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:37,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:52:37,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:39,251 INFO L124 PetriNetUnfolderBase]: 4589/7101 cut-off events. [2024-06-21 17:52:39,251 INFO L125 PetriNetUnfolderBase]: For 599960/599968 co-relation queries the response was YES. [2024-06-21 17:52:39,332 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. [2024-06-21 17:52:39,363 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 467 selfloop transitions, 99 changer transitions 0/569 dead transitions. [2024-06-21 17:52:39,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 569 transitions, 11379 flow [2024-06-21 17:52:39,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:52:39,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:52:39,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 17:52:39,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 17:52:39,364 INFO L175 Difference]: Start difference. First operand has 379 places, 533 transitions, 9741 flow. Second operand 9 states and 150 transitions. [2024-06-21 17:52:39,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 569 transitions, 11379 flow [2024-06-21 17:52:41,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 569 transitions, 11282 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-21 17:52:41,363 INFO L231 Difference]: Finished difference. Result has 385 places, 542 transitions, 9992 flow [2024-06-21 17:52:41,363 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} [2024-06-21 17:52:41,364 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 344 predicate places. [2024-06-21 17:52:41,364 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 542 transitions, 9992 flow [2024-06-21 17:52:41,364 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) [2024-06-21 17:52:41,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:41,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:41,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 17:52:41,365 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)] === [2024-06-21 17:52:41,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:41,365 INFO L85 PathProgramCache]: Analyzing trace with hash -2039034921, now seen corresponding path program 2 times [2024-06-21 17:52:41,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:41,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890584195] [2024-06-21 17:52:41,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:41,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:41,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:41,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:41,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:41,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890584195] [2024-06-21 17:52:41,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890584195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:41,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:41,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:52:41,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383167095] [2024-06-21 17:52:41,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:41,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:52:41,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:41,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:52:41,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:52:41,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:52:41,898 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) [2024-06-21 17:52:41,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:41,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:52:41,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:43,758 INFO L124 PetriNetUnfolderBase]: 4507/7044 cut-off events. [2024-06-21 17:52:43,759 INFO L125 PetriNetUnfolderBase]: For 648107/648134 co-relation queries the response was YES. [2024-06-21 17:52:43,829 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. [2024-06-21 17:52:43,859 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 478 selfloop transitions, 26 changer transitions 0/565 dead transitions. [2024-06-21 17:52:43,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 565 transitions, 11158 flow [2024-06-21 17:52:43,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:52:43,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:52:43,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-21 17:52:43,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2024-06-21 17:52:43,860 INFO L175 Difference]: Start difference. First operand has 385 places, 542 transitions, 9992 flow. Second operand 7 states and 113 transitions. [2024-06-21 17:52:43,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 565 transitions, 11158 flow [2024-06-21 17:52:46,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 565 transitions, 11045 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-21 17:52:46,052 INFO L231 Difference]: Finished difference. Result has 389 places, 550 transitions, 10044 flow [2024-06-21 17:52:46,053 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} [2024-06-21 17:52:46,053 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 348 predicate places. [2024-06-21 17:52:46,053 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 550 transitions, 10044 flow [2024-06-21 17:52:46,053 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) [2024-06-21 17:52:46,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:46,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:46,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 17:52:46,053 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)] === [2024-06-21 17:52:46,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:46,054 INFO L85 PathProgramCache]: Analyzing trace with hash -485656769, now seen corresponding path program 2 times [2024-06-21 17:52:46,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:46,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680277399] [2024-06-21 17:52:46,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:46,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:46,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:46,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:46,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:46,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680277399] [2024-06-21 17:52:46,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680277399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:46,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:46,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:52:46,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15154870] [2024-06-21 17:52:46,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:46,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:52:46,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:46,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:52:46,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:52:46,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:52:46,661 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) [2024-06-21 17:52:46,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:46,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:52:46,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:48,595 INFO L124 PetriNetUnfolderBase]: 4689/7251 cut-off events. [2024-06-21 17:52:48,595 INFO L125 PetriNetUnfolderBase]: For 642462/642466 co-relation queries the response was YES. [2024-06-21 17:52:48,682 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. [2024-06-21 17:52:48,714 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 476 selfloop transitions, 120 changer transitions 0/599 dead transitions. [2024-06-21 17:52:48,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 599 transitions, 11847 flow [2024-06-21 17:52:48,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:52:48,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:52:48,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 17:52:48,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 17:52:48,715 INFO L175 Difference]: Start difference. First operand has 389 places, 550 transitions, 10044 flow. Second operand 8 states and 136 transitions. [2024-06-21 17:52:48,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 599 transitions, 11847 flow [2024-06-21 17:52:51,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 599 transitions, 11750 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-21 17:52:51,359 INFO L231 Difference]: Finished difference. Result has 394 places, 571 transitions, 10609 flow [2024-06-21 17:52:51,360 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} [2024-06-21 17:52:51,360 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 353 predicate places. [2024-06-21 17:52:51,360 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 571 transitions, 10609 flow [2024-06-21 17:52:51,360 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) [2024-06-21 17:52:51,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:51,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:51,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 17:52:51,361 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)] === [2024-06-21 17:52:51,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:51,361 INFO L85 PathProgramCache]: Analyzing trace with hash -463046421, now seen corresponding path program 3 times [2024-06-21 17:52:51,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:51,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432178486] [2024-06-21 17:52:51,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:51,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:51,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:51,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:51,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:51,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432178486] [2024-06-21 17:52:51,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432178486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:51,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:51,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:52:51,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583338977] [2024-06-21 17:52:51,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:51,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:52:51,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:51,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:52:51,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:52:51,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:52:51,909 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) [2024-06-21 17:52:51,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:51,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:52:51,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:53,589 INFO L124 PetriNetUnfolderBase]: 4569/7131 cut-off events. [2024-06-21 17:52:53,589 INFO L125 PetriNetUnfolderBase]: For 661443/661468 co-relation queries the response was YES. [2024-06-21 17:52:53,675 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. [2024-06-21 17:52:53,707 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 496 selfloop transitions, 24 changer transitions 0/587 dead transitions. [2024-06-21 17:52:53,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 587 transitions, 11717 flow [2024-06-21 17:52:53,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:52:53,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:52:53,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-21 17:52:53,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-21 17:52:53,709 INFO L175 Difference]: Start difference. First operand has 394 places, 571 transitions, 10609 flow. Second operand 6 states and 104 transitions. [2024-06-21 17:52:53,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 587 transitions, 11717 flow [2024-06-21 17:52:56,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 587 transitions, 11468 flow, removed 61 selfloop flow, removed 4 redundant places. [2024-06-21 17:52:56,499 INFO L231 Difference]: Finished difference. Result has 396 places, 571 transitions, 10419 flow [2024-06-21 17:52:56,500 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} [2024-06-21 17:52:56,500 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 355 predicate places. [2024-06-21 17:52:56,500 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 571 transitions, 10419 flow [2024-06-21 17:52:56,500 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) [2024-06-21 17:52:56,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:56,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:56,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 17:52:56,501 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)] === [2024-06-21 17:52:56,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:56,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1144283987, now seen corresponding path program 1 times [2024-06-21 17:52:56,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:56,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580884809] [2024-06-21 17:52:56,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:56,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:56,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:57,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:57,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:57,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580884809] [2024-06-21 17:52:57,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580884809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:57,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:57,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:52:57,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872293598] [2024-06-21 17:52:57,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:57,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:52:57,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:57,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:52:57,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:52:57,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:52:57,290 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) [2024-06-21 17:52:57,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:57,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:52:57,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:58,963 INFO L124 PetriNetUnfolderBase]: 4675/7237 cut-off events. [2024-06-21 17:52:58,963 INFO L125 PetriNetUnfolderBase]: For 643022/643022 co-relation queries the response was YES. [2024-06-21 17:52:59,052 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. [2024-06-21 17:52:59,086 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 564 selfloop transitions, 14 changer transitions 0/581 dead transitions. [2024-06-21 17:52:59,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 581 transitions, 11631 flow [2024-06-21 17:52:59,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:52:59,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:52:59,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 80 transitions. [2024-06-21 17:52:59,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 17:52:59,087 INFO L175 Difference]: Start difference. First operand has 396 places, 571 transitions, 10419 flow. Second operand 5 states and 80 transitions. [2024-06-21 17:52:59,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 581 transitions, 11631 flow [2024-06-21 17:53:01,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 581 transitions, 11572 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 17:53:01,727 INFO L231 Difference]: Finished difference. Result has 396 places, 573 transitions, 10425 flow [2024-06-21 17:53:01,728 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} [2024-06-21 17:53:01,728 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 355 predicate places. [2024-06-21 17:53:01,728 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 573 transitions, 10425 flow [2024-06-21 17:53:01,728 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) [2024-06-21 17:53:01,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:53:01,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:53:01,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 17:53:01,729 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)] === [2024-06-21 17:53:01,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:53:01,729 INFO L85 PathProgramCache]: Analyzing trace with hash 195274251, now seen corresponding path program 1 times [2024-06-21 17:53:01,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:53:01,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307643283] [2024-06-21 17:53:01,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:53:01,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:53:01,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:53:02,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:53:02,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:53:02,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307643283] [2024-06-21 17:53:02,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307643283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:53:02,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:53:02,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:53:02,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055567992] [2024-06-21 17:53:02,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:53:02,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:53:02,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:53:02,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:53:02,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:53:02,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:53:02,546 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) [2024-06-21 17:53:02,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:53:02,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:53:02,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:53:04,408 INFO L124 PetriNetUnfolderBase]: 4716/7291 cut-off events. [2024-06-21 17:53:04,408 INFO L125 PetriNetUnfolderBase]: For 672839/672847 co-relation queries the response was YES. [2024-06-21 17:53:04,496 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. [2024-06-21 17:53:04,529 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 543 selfloop transitions, 67 changer transitions 0/613 dead transitions. [2024-06-21 17:53:04,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 613 transitions, 11845 flow [2024-06-21 17:53:04,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:53:04,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:53:04,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-21 17:53:04,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.395 [2024-06-21 17:53:04,536 INFO L175 Difference]: Start difference. First operand has 396 places, 573 transitions, 10425 flow. Second operand 10 states and 158 transitions. [2024-06-21 17:53:04,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 613 transitions, 11845 flow [2024-06-21 17:53:07,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 613 transitions, 11796 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-21 17:53:07,319 INFO L231 Difference]: Finished difference. Result has 403 places, 574 transitions, 10566 flow [2024-06-21 17:53:07,320 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} [2024-06-21 17:53:07,320 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 362 predicate places. [2024-06-21 17:53:07,320 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 574 transitions, 10566 flow [2024-06-21 17:53:07,320 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) [2024-06-21 17:53:07,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:53:07,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:53:07,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 17:53:07,321 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)] === [2024-06-21 17:53:07,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:53:07,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1595843291, now seen corresponding path program 2 times [2024-06-21 17:53:07,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:53:07,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874077474] [2024-06-21 17:53:07,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:53:07,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:53:07,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:53:08,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:53:08,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:53:08,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874077474] [2024-06-21 17:53:08,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874077474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:53:08,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:53:08,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:53:08,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191717008] [2024-06-21 17:53:08,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:53:08,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:53:08,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:53:08,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:53:08,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:53:08,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:53:08,433 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) [2024-06-21 17:53:08,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:53:08,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:53:08,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:53:10,428 INFO L124 PetriNetUnfolderBase]: 4784/7413 cut-off events. [2024-06-21 17:53:10,428 INFO L125 PetriNetUnfolderBase]: For 699582/699590 co-relation queries the response was YES. [2024-06-21 17:53:10,519 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. [2024-06-21 17:53:10,551 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 542 selfloop transitions, 80 changer transitions 0/625 dead transitions. [2024-06-21 17:53:10,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 625 transitions, 12100 flow [2024-06-21 17:53:10,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:53:10,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:53:10,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 191 transitions. [2024-06-21 17:53:10,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39791666666666664 [2024-06-21 17:53:10,553 INFO L175 Difference]: Start difference. First operand has 403 places, 574 transitions, 10566 flow. Second operand 12 states and 191 transitions. [2024-06-21 17:53:10,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 625 transitions, 12100 flow [2024-06-21 17:53:13,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 625 transitions, 11904 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-21 17:53:13,106 INFO L231 Difference]: Finished difference. Result has 408 places, 576 transitions, 10643 flow [2024-06-21 17:53:13,106 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} [2024-06-21 17:53:13,106 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 367 predicate places. [2024-06-21 17:53:13,107 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 576 transitions, 10643 flow [2024-06-21 17:53:13,107 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) [2024-06-21 17:53:13,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:53:13,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:53:13,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 17:53:13,107 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)] === [2024-06-21 17:53:13,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:53:13,107 INFO L85 PathProgramCache]: Analyzing trace with hash 125484243, now seen corresponding path program 3 times [2024-06-21 17:53:13,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:53:13,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236274167] [2024-06-21 17:53:13,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:53:13,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:53:13,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:53:14,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:53:14,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:53:14,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236274167] [2024-06-21 17:53:14,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236274167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:53:14,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:53:14,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:53:14,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739601307] [2024-06-21 17:53:14,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:53:14,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:53:14,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:53:14,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:53:14,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:53:14,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:53:14,122 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) [2024-06-21 17:53:14,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:53:14,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:53:14,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:53:16,166 INFO L124 PetriNetUnfolderBase]: 4825/7490 cut-off events. [2024-06-21 17:53:16,167 INFO L125 PetriNetUnfolderBase]: For 712264/712268 co-relation queries the response was YES. [2024-06-21 17:53:16,252 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. [2024-06-21 17:53:16,281 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 537 selfloop transitions, 81 changer transitions 0/621 dead transitions. [2024-06-21 17:53:16,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 621 transitions, 12093 flow [2024-06-21 17:53:16,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:53:16,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:53:16,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 177 transitions. [2024-06-21 17:53:16,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4022727272727273 [2024-06-21 17:53:16,283 INFO L175 Difference]: Start difference. First operand has 408 places, 576 transitions, 10643 flow. Second operand 11 states and 177 transitions. [2024-06-21 17:53:16,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 621 transitions, 12093 flow [2024-06-21 17:53:19,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 621 transitions, 11884 flow, removed 18 selfloop flow, removed 11 redundant places. [2024-06-21 17:53:19,126 INFO L231 Difference]: Finished difference. Result has 408 places, 577 transitions, 10635 flow [2024-06-21 17:53:19,127 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} [2024-06-21 17:53:19,127 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 367 predicate places. [2024-06-21 17:53:19,127 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 577 transitions, 10635 flow [2024-06-21 17:53:19,127 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) [2024-06-21 17:53:19,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:53:19,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:53:19,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 17:53:19,128 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)] === [2024-06-21 17:53:19,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:53:19,128 INFO L85 PathProgramCache]: Analyzing trace with hash 156649473, now seen corresponding path program 4 times [2024-06-21 17:53:19,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:53:19,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477900554] [2024-06-21 17:53:19,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:53:19,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:53:19,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:53:20,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:53:20,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:53:20,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477900554] [2024-06-21 17:53:20,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477900554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:53:20,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:53:20,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:53:20,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96990686] [2024-06-21 17:53:20,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:53:20,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:53:20,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:53:20,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:53:20,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:53:20,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:53:20,258 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) [2024-06-21 17:53:20,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:53:20,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:53:20,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:53:22,309 INFO L124 PetriNetUnfolderBase]: 4866/7559 cut-off events. [2024-06-21 17:53:22,310 INFO L125 PetriNetUnfolderBase]: For 729629/729633 co-relation queries the response was YES. [2024-06-21 17:53:22,402 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. [2024-06-21 17:53:22,437 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 536 selfloop transitions, 83 changer transitions 0/622 dead transitions. [2024-06-21 17:53:22,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 622 transitions, 12103 flow [2024-06-21 17:53:22,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:53:22,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:53:22,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 178 transitions. [2024-06-21 17:53:22,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40454545454545454 [2024-06-21 17:53:22,438 INFO L175 Difference]: Start difference. First operand has 408 places, 577 transitions, 10635 flow. Second operand 11 states and 178 transitions. [2024-06-21 17:53:22,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 622 transitions, 12103 flow [2024-06-21 17:53:25,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 622 transitions, 11928 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-21 17:53:25,595 INFO L231 Difference]: Finished difference. Result has 410 places, 578 transitions, 10685 flow [2024-06-21 17:53:25,596 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} [2024-06-21 17:53:25,596 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 369 predicate places. [2024-06-21 17:53:25,596 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 578 transitions, 10685 flow [2024-06-21 17:53:25,596 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) [2024-06-21 17:53:25,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:53:25,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:53:25,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 17:53:25,597 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)] === [2024-06-21 17:53:25,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:53:25,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1692987175, now seen corresponding path program 5 times [2024-06-21 17:53:25,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:53:25,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345793411] [2024-06-21 17:53:25,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:53:25,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:53:25,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:53:26,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:53:26,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:53:26,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345793411] [2024-06-21 17:53:26,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345793411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:53:26,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:53:26,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:53:26,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545303860] [2024-06-21 17:53:26,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:53:26,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:53:26,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:53:26,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:53:26,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:53:26,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:53:26,820 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) [2024-06-21 17:53:26,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:53:26,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:53:26,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:53:28,921 INFO L124 PetriNetUnfolderBase]: 4934/7667 cut-off events. [2024-06-21 17:53:28,921 INFO L125 PetriNetUnfolderBase]: For 752338/752346 co-relation queries the response was YES. [2024-06-21 17:53:29,009 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. [2024-06-21 17:53:29,039 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 537 selfloop transitions, 82 changer transitions 0/622 dead transitions. [2024-06-21 17:53:29,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 622 transitions, 12196 flow [2024-06-21 17:53:29,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:53:29,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:53:29,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 179 transitions. [2024-06-21 17:53:29,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4068181818181818 [2024-06-21 17:53:29,040 INFO L175 Difference]: Start difference. First operand has 410 places, 578 transitions, 10685 flow. Second operand 11 states and 179 transitions. [2024-06-21 17:53:29,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 622 transitions, 12196 flow [2024-06-21 17:53:32,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 622 transitions, 11933 flow, removed 40 selfloop flow, removed 10 redundant places. [2024-06-21 17:53:32,232 INFO L231 Difference]: Finished difference. Result has 411 places, 580 transitions, 10703 flow [2024-06-21 17:53:32,233 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} [2024-06-21 17:53:32,233 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 370 predicate places. [2024-06-21 17:53:32,233 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 580 transitions, 10703 flow [2024-06-21 17:53:32,233 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) [2024-06-21 17:53:32,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:53:32,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:53:32,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 17:53:32,234 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)] === [2024-06-21 17:53:32,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:53:32,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1760821505, now seen corresponding path program 6 times [2024-06-21 17:53:32,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:53:32,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672751842] [2024-06-21 17:53:32,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:53:32,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:53:32,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:53:33,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:53:33,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:53:33,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672751842] [2024-06-21 17:53:33,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672751842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:53:33,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:53:33,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:53:33,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047302069] [2024-06-21 17:53:33,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:53:33,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:53:33,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:53:33,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:53:33,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:53:33,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:53:33,267 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) [2024-06-21 17:53:33,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:53:33,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:53:33,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:53:35,264 INFO L124 PetriNetUnfolderBase]: 4914/7635 cut-off events. [2024-06-21 17:53:35,265 INFO L125 PetriNetUnfolderBase]: For 731351/731359 co-relation queries the response was YES. [2024-06-21 17:53:35,353 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. [2024-06-21 17:53:35,384 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 503 selfloop transitions, 113 changer transitions 0/619 dead transitions. [2024-06-21 17:53:35,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 619 transitions, 12119 flow [2024-06-21 17:53:35,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:53:35,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:53:35,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-21 17:53:35,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41 [2024-06-21 17:53:35,387 INFO L175 Difference]: Start difference. First operand has 411 places, 580 transitions, 10703 flow. Second operand 10 states and 164 transitions. [2024-06-21 17:53:35,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 619 transitions, 12119 flow [2024-06-21 17:53:38,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 619 transitions, 11917 flow, removed 21 selfloop flow, removed 9 redundant places. [2024-06-21 17:53:38,226 INFO L231 Difference]: Finished difference. Result has 413 places, 581 transitions, 10782 flow [2024-06-21 17:53:38,226 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} [2024-06-21 17:53:38,226 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 372 predicate places. [2024-06-21 17:53:38,226 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 581 transitions, 10782 flow [2024-06-21 17:53:38,227 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) [2024-06-21 17:53:38,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:53:38,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:53:38,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 17:53:38,227 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)] === [2024-06-21 17:53:38,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:53:38,227 INFO L85 PathProgramCache]: Analyzing trace with hash -721150327, now seen corresponding path program 7 times [2024-06-21 17:53:38,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:53:38,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178512007] [2024-06-21 17:53:38,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:53:38,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:53:38,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:53:39,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:53:39,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:53:39,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178512007] [2024-06-21 17:53:39,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178512007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:53:39,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:53:39,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:53:39,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521788864] [2024-06-21 17:53:39,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:53:39,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:53:39,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:53:39,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:53:39,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:53:39,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:53:39,230 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) [2024-06-21 17:53:39,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:53:39,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:53:39,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:53:41,324 INFO L124 PetriNetUnfolderBase]: 4955/7706 cut-off events. [2024-06-21 17:53:41,325 INFO L125 PetriNetUnfolderBase]: For 750215/750223 co-relation queries the response was YES. [2024-06-21 17:53:41,417 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. [2024-06-21 17:53:41,448 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 523 selfloop transitions, 103 changer transitions 0/629 dead transitions. [2024-06-21 17:53:41,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 629 transitions, 12312 flow [2024-06-21 17:53:41,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:53:41,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:53:41,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 186 transitions. [2024-06-21 17:53:41,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42272727272727273 [2024-06-21 17:53:41,449 INFO L175 Difference]: Start difference. First operand has 413 places, 581 transitions, 10782 flow. Second operand 11 states and 186 transitions. [2024-06-21 17:53:41,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 629 transitions, 12312 flow [2024-06-21 17:53:44,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 629 transitions, 12055 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-21 17:53:44,989 INFO L231 Difference]: Finished difference. Result has 416 places, 582 transitions, 10793 flow [2024-06-21 17:53:44,990 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} [2024-06-21 17:53:44,990 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 375 predicate places. [2024-06-21 17:53:44,990 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 582 transitions, 10793 flow [2024-06-21 17:53:44,990 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) [2024-06-21 17:53:44,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:53:44,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:53:44,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 17:53:44,991 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)] === [2024-06-21 17:53:44,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:53:44,991 INFO L85 PathProgramCache]: Analyzing trace with hash -385083423, now seen corresponding path program 3 times [2024-06-21 17:53:44,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:53:44,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054496861] [2024-06-21 17:53:44,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:53:44,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:53:44,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:53:45,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:53:45,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:53:45,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054496861] [2024-06-21 17:53:45,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054496861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:53:45,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:53:45,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:53:45,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415491024] [2024-06-21 17:53:45,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:53:45,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:53:45,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:53:45,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:53:45,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:53:45,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:53:45,541 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) [2024-06-21 17:53:45,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:53:45,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:53:45,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:53:47,661 INFO L124 PetriNetUnfolderBase]: 4943/7690 cut-off events. [2024-06-21 17:53:47,661 INFO L125 PetriNetUnfolderBase]: For 717417/717425 co-relation queries the response was YES. [2024-06-21 17:53:47,748 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. [2024-06-21 17:53:47,778 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 500 selfloop transitions, 108 changer transitions 0/611 dead transitions. [2024-06-21 17:53:47,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 611 transitions, 12283 flow [2024-06-21 17:53:47,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:53:47,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:53:47,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 17:53:47,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2024-06-21 17:53:47,779 INFO L175 Difference]: Start difference. First operand has 416 places, 582 transitions, 10793 flow. Second operand 9 states and 151 transitions. [2024-06-21 17:53:47,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 611 transitions, 12283 flow [2024-06-21 17:53:51,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 611 transitions, 11987 flow, removed 46 selfloop flow, removed 9 redundant places. [2024-06-21 17:53:51,306 INFO L231 Difference]: Finished difference. Result has 416 places, 582 transitions, 10724 flow [2024-06-21 17:53:51,307 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} [2024-06-21 17:53:51,307 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 375 predicate places. [2024-06-21 17:53:51,307 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 582 transitions, 10724 flow [2024-06-21 17:53:51,307 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) [2024-06-21 17:53:51,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:53:51,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:53:51,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 17:53:51,308 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)] === [2024-06-21 17:53:51,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:53:51,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1666439451, now seen corresponding path program 8 times [2024-06-21 17:53:51,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:53:51,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899405912] [2024-06-21 17:53:51,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:53:51,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:53:51,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:53:52,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:53:52,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:53:52,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899405912] [2024-06-21 17:53:52,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899405912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:53:52,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:53:52,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:53:52,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023454898] [2024-06-21 17:53:52,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:53:52,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:53:52,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:53:52,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:53:52,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:53:52,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:53:52,184 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) [2024-06-21 17:53:52,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:53:52,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:53:52,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:53:54,301 INFO L124 PetriNetUnfolderBase]: 4984/7759 cut-off events. [2024-06-21 17:53:54,302 INFO L125 PetriNetUnfolderBase]: For 732200/732208 co-relation queries the response was YES. [2024-06-21 17:53:54,387 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. [2024-06-21 17:53:54,415 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 530 selfloop transitions, 84 changer transitions 0/617 dead transitions. [2024-06-21 17:53:54,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 617 transitions, 12144 flow [2024-06-21 17:53:54,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:53:54,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:53:54,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-21 17:53:54,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3972222222222222 [2024-06-21 17:53:54,417 INFO L175 Difference]: Start difference. First operand has 416 places, 582 transitions, 10724 flow. Second operand 9 states and 143 transitions. [2024-06-21 17:53:54,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 617 transitions, 12144 flow [2024-06-21 17:53:57,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 617 transitions, 11967 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 17:53:57,577 INFO L231 Difference]: Finished difference. Result has 419 places, 583 transitions, 10784 flow [2024-06-21 17:53:57,578 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} [2024-06-21 17:53:57,578 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 378 predicate places. [2024-06-21 17:53:57,578 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 583 transitions, 10784 flow [2024-06-21 17:53:57,578 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) [2024-06-21 17:53:57,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:53:57,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:53:57,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 17:53:57,579 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)] === [2024-06-21 17:53:57,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:53:57,579 INFO L85 PathProgramCache]: Analyzing trace with hash 968276589, now seen corresponding path program 9 times [2024-06-21 17:53:57,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:53:57,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098162100] [2024-06-21 17:53:57,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:53:57,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:53:57,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:53:58,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:53:58,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:53:58,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098162100] [2024-06-21 17:53:58,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098162100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:53:58,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:53:58,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:53:58,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851304716] [2024-06-21 17:53:58,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:53:58,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:53:58,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:53:58,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:53:58,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:53:58,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:53:58,689 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) [2024-06-21 17:53:58,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:53:58,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:53:58,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:54:01,029 INFO L124 PetriNetUnfolderBase]: 5025/7840 cut-off events. [2024-06-21 17:54:01,030 INFO L125 PetriNetUnfolderBase]: For 753227/753231 co-relation queries the response was YES. [2024-06-21 17:54:01,118 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. [2024-06-21 17:54:01,147 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 507 selfloop transitions, 114 changer transitions 0/624 dead transitions. [2024-06-21 17:54:01,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 624 transitions, 12248 flow [2024-06-21 17:54:01,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:54:01,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:54:01,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-21 17:54:01,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.405 [2024-06-21 17:54:01,149 INFO L175 Difference]: Start difference. First operand has 419 places, 583 transitions, 10784 flow. Second operand 10 states and 162 transitions. [2024-06-21 17:54:01,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 624 transitions, 12248 flow [2024-06-21 17:54:04,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 624 transitions, 12037 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-21 17:54:04,583 INFO L231 Difference]: Finished difference. Result has 422 places, 584 transitions, 10869 flow [2024-06-21 17:54:04,583 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} [2024-06-21 17:54:04,584 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 381 predicate places. [2024-06-21 17:54:04,584 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 584 transitions, 10869 flow [2024-06-21 17:54:04,584 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) [2024-06-21 17:54:04,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:54:04,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:54:04,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 17:54:04,584 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)] === [2024-06-21 17:54:04,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:54:04,585 INFO L85 PathProgramCache]: Analyzing trace with hash 968391909, now seen corresponding path program 10 times [2024-06-21 17:54:04,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:54:04,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952335542] [2024-06-21 17:54:04,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:54:04,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:54:04,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:54:05,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:54:05,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:54:05,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952335542] [2024-06-21 17:54:05,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952335542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:54:05,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:54:05,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:54:05,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401619216] [2024-06-21 17:54:05,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:54:05,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:54:05,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:54:05,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:54:05,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:54:05,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:54:05,721 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) [2024-06-21 17:54:05,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:54:05,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:54:05,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:54:07,841 INFO L124 PetriNetUnfolderBase]: 5107/7984 cut-off events. [2024-06-21 17:54:07,841 INFO L125 PetriNetUnfolderBase]: For 735214/735218 co-relation queries the response was YES. [2024-06-21 17:54:07,940 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. [2024-06-21 17:54:07,973 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 514 selfloop transitions, 109 changer transitions 0/626 dead transitions. [2024-06-21 17:54:07,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 626 transitions, 12340 flow [2024-06-21 17:54:07,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:54:07,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:54:07,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-21 17:54:07,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025 [2024-06-21 17:54:07,974 INFO L175 Difference]: Start difference. First operand has 422 places, 584 transitions, 10869 flow. Second operand 10 states and 161 transitions. [2024-06-21 17:54:07,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 626 transitions, 12340 flow [2024-06-21 17:54:11,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 626 transitions, 12072 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-21 17:54:11,747 INFO L231 Difference]: Finished difference. Result has 424 places, 586 transitions, 10887 flow [2024-06-21 17:54:11,748 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} [2024-06-21 17:54:11,748 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 383 predicate places. [2024-06-21 17:54:11,748 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 586 transitions, 10887 flow [2024-06-21 17:54:11,748 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) [2024-06-21 17:54:11,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:54:11,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:54:11,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 17:54:11,749 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)] === [2024-06-21 17:54:11,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:54:11,750 INFO L85 PathProgramCache]: Analyzing trace with hash 204879103, now seen corresponding path program 11 times [2024-06-21 17:54:11,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:54:11,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354483181] [2024-06-21 17:54:11,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:54:11,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:54:11,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:54:12,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:54:12,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:54:12,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354483181] [2024-06-21 17:54:12,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354483181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:54:12,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:54:12,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:54:12,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294025442] [2024-06-21 17:54:12,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:54:12,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:54:12,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:54:12,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:54:12,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:54:12,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:54:12,837 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) [2024-06-21 17:54:12,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:54:12,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:54:12,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:54:15,032 INFO L124 PetriNetUnfolderBase]: 5087/7942 cut-off events. [2024-06-21 17:54:15,032 INFO L125 PetriNetUnfolderBase]: For 684009/684017 co-relation queries the response was YES. [2024-06-21 17:54:15,126 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. [2024-06-21 17:54:15,157 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 477 selfloop transitions, 141 changer transitions 0/621 dead transitions. [2024-06-21 17:54:15,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 621 transitions, 12292 flow [2024-06-21 17:54:15,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:54:15,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:54:15,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-21 17:54:15,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-06-21 17:54:15,158 INFO L175 Difference]: Start difference. First operand has 424 places, 586 transitions, 10887 flow. Second operand 9 states and 147 transitions. [2024-06-21 17:54:15,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 621 transitions, 12292 flow [2024-06-21 17:54:18,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 621 transitions, 12055 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-21 17:54:18,674 INFO L231 Difference]: Finished difference. Result has 426 places, 587 transitions, 11000 flow [2024-06-21 17:54:18,675 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} [2024-06-21 17:54:18,675 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 385 predicate places. [2024-06-21 17:54:18,675 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 587 transitions, 11000 flow [2024-06-21 17:54:18,675 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) [2024-06-21 17:54:18,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:54:18,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:54:18,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 17:54:18,676 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)] === [2024-06-21 17:54:18,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:54:18,676 INFO L85 PathProgramCache]: Analyzing trace with hash 830589163, now seen corresponding path program 12 times [2024-06-21 17:54:18,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:54:18,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978725289] [2024-06-21 17:54:18,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:54:18,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:54:18,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:54:19,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:54:19,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:54:19,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978725289] [2024-06-21 17:54:19,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978725289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:54:19,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:54:19,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:54:19,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778151815] [2024-06-21 17:54:19,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:54:19,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:54:19,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:54:19,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:54:19,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:54:19,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:54:19,920 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) [2024-06-21 17:54:19,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:54:19,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:54:19,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:54:21,994 INFO L124 PetriNetUnfolderBase]: 5128/8013 cut-off events. [2024-06-21 17:54:21,995 INFO L125 PetriNetUnfolderBase]: For 703554/703562 co-relation queries the response was YES. [2024-06-21 17:54:22,111 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. [2024-06-21 17:54:22,148 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 498 selfloop transitions, 126 changer transitions 0/627 dead transitions. [2024-06-21 17:54:22,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 627 transitions, 12464 flow [2024-06-21 17:54:22,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:54:22,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:54:22,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-21 17:54:22,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4075 [2024-06-21 17:54:22,150 INFO L175 Difference]: Start difference. First operand has 426 places, 587 transitions, 11000 flow. Second operand 10 states and 163 transitions. [2024-06-21 17:54:22,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 627 transitions, 12464 flow [2024-06-21 17:54:25,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 627 transitions, 12130 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-21 17:54:25,514 INFO L231 Difference]: Finished difference. Result has 428 places, 588 transitions, 10976 flow [2024-06-21 17:54:25,514 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} [2024-06-21 17:54:25,514 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 387 predicate places. [2024-06-21 17:54:25,515 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 588 transitions, 10976 flow [2024-06-21 17:54:25,515 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) [2024-06-21 17:54:25,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:54:25,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:54:25,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 17:54:25,515 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)] === [2024-06-21 17:54:25,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:54:25,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1432312351, now seen corresponding path program 4 times [2024-06-21 17:54:25,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:54:25,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150163059] [2024-06-21 17:54:25,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:54:25,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:54:25,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:54:26,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:54:26,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:54:26,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150163059] [2024-06-21 17:54:26,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150163059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:54:26,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:54:26,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:54:26,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910910573] [2024-06-21 17:54:26,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:54:26,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:54:26,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:54:26,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:54:26,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:54:26,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:54:26,116 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) [2024-06-21 17:54:26,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:54:26,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:54:26,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:54:28,233 INFO L124 PetriNetUnfolderBase]: 5190/8099 cut-off events. [2024-06-21 17:54:28,233 INFO L125 PetriNetUnfolderBase]: For 679577/679585 co-relation queries the response was YES. [2024-06-21 17:54:28,337 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. [2024-06-21 17:54:28,372 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 490 selfloop transitions, 130 changer transitions 0/623 dead transitions. [2024-06-21 17:54:28,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 623 transitions, 12802 flow [2024-06-21 17:54:28,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:54:28,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:54:28,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 17:54:28,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415625 [2024-06-21 17:54:28,373 INFO L175 Difference]: Start difference. First operand has 428 places, 588 transitions, 10976 flow. Second operand 8 states and 133 transitions. [2024-06-21 17:54:28,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 623 transitions, 12802 flow [2024-06-21 17:54:31,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 623 transitions, 12506 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-21 17:54:31,656 INFO L231 Difference]: Finished difference. Result has 430 places, 599 transitions, 11200 flow [2024-06-21 17:54:31,656 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} [2024-06-21 17:54:31,656 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 389 predicate places. [2024-06-21 17:54:31,656 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 599 transitions, 11200 flow [2024-06-21 17:54:31,656 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) [2024-06-21 17:54:31,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:54:31,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:54:31,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 17:54:31,657 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)] === [2024-06-21 17:54:31,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:54:31,657 INFO L85 PathProgramCache]: Analyzing trace with hash 12592733, now seen corresponding path program 5 times [2024-06-21 17:54:31,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:54:31,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10373393] [2024-06-21 17:54:31,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:54:31,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:54:31,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:54:32,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:54:32,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:54:32,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10373393] [2024-06-21 17:54:32,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10373393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:54:32,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:54:32,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:54:32,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573883543] [2024-06-21 17:54:32,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:54:32,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:54:32,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:54:32,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:54:32,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:54:32,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:54:32,265 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) [2024-06-21 17:54:32,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:54:32,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:54:32,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:54:34,482 INFO L124 PetriNetUnfolderBase]: 5178/8083 cut-off events. [2024-06-21 17:54:34,483 INFO L125 PetriNetUnfolderBase]: For 662710/662718 co-relation queries the response was YES. [2024-06-21 17:54:34,592 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. [2024-06-21 17:54:34,626 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 505 selfloop transitions, 118 changer transitions 0/626 dead transitions. [2024-06-21 17:54:34,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 626 transitions, 12724 flow [2024-06-21 17:54:34,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:54:34,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:54:34,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 17:54:34,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-06-21 17:54:34,627 INFO L175 Difference]: Start difference. First operand has 430 places, 599 transitions, 11200 flow. Second operand 8 states and 134 transitions. [2024-06-21 17:54:34,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 626 transitions, 12724 flow [2024-06-21 17:54:37,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 626 transitions, 12536 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-21 17:54:37,841 INFO L231 Difference]: Finished difference. Result has 434 places, 599 transitions, 11264 flow [2024-06-21 17:54:37,842 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} [2024-06-21 17:54:37,842 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 393 predicate places. [2024-06-21 17:54:37,842 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 599 transitions, 11264 flow [2024-06-21 17:54:37,842 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) [2024-06-21 17:54:37,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:54:37,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:54:37,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 17:54:37,843 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)] === [2024-06-21 17:54:37,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:54:37,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1034481215, now seen corresponding path program 13 times [2024-06-21 17:54:37,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:54:37,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018400221] [2024-06-21 17:54:37,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:54:37,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:54:37,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:54:38,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:54:38,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:54:38,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018400221] [2024-06-21 17:54:38,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018400221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:54:38,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:54:38,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:54:38,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147070370] [2024-06-21 17:54:38,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:54:38,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:54:38,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:54:38,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:54:38,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:54:39,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:54:39,014 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) [2024-06-21 17:54:39,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:54:39,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:54:39,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:54:41,174 INFO L124 PetriNetUnfolderBase]: 5219/8157 cut-off events. [2024-06-21 17:54:41,175 INFO L125 PetriNetUnfolderBase]: For 685353/685363 co-relation queries the response was YES. [2024-06-21 17:54:41,275 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. [2024-06-21 17:54:41,307 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 491 selfloop transitions, 148 changer transitions 0/642 dead transitions. [2024-06-21 17:54:41,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 642 transitions, 12792 flow [2024-06-21 17:54:41,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:54:41,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:54:41,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-21 17:54:41,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325 [2024-06-21 17:54:41,308 INFO L175 Difference]: Start difference. First operand has 434 places, 599 transitions, 11264 flow. Second operand 10 states and 173 transitions. [2024-06-21 17:54:41,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 642 transitions, 12792 flow [2024-06-21 17:54:44,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 642 transitions, 12504 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 17:54:44,337 INFO L231 Difference]: Finished difference. Result has 436 places, 600 transitions, 11314 flow [2024-06-21 17:54:44,337 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} [2024-06-21 17:54:44,337 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 395 predicate places. [2024-06-21 17:54:44,337 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 600 transitions, 11314 flow [2024-06-21 17:54:44,337 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) [2024-06-21 17:54:44,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:54:44,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:54:44,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 17:54:44,338 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)] === [2024-06-21 17:54:44,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:54:44,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1205183645, now seen corresponding path program 14 times [2024-06-21 17:54:44,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:54:44,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953888276] [2024-06-21 17:54:44,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:54:44,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:54:44,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:54:45,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:54:45,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:54:45,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953888276] [2024-06-21 17:54:45,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953888276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:54:45,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:54:45,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:54:45,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728778881] [2024-06-21 17:54:45,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:54:45,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:54:45,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:54:45,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:54:45,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:54:45,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:54:45,492 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) [2024-06-21 17:54:45,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:54:45,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:54:45,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:54:47,631 INFO L124 PetriNetUnfolderBase]: 5199/8125 cut-off events. [2024-06-21 17:54:47,632 INFO L125 PetriNetUnfolderBase]: For 657954/657964 co-relation queries the response was YES. [2024-06-21 17:54:47,745 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. [2024-06-21 17:54:47,780 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 482 selfloop transitions, 153 changer transitions 0/638 dead transitions. [2024-06-21 17:54:47,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 638 transitions, 12756 flow [2024-06-21 17:54:47,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:54:47,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:54:47,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-21 17:54:47,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42 [2024-06-21 17:54:47,781 INFO L175 Difference]: Start difference. First operand has 436 places, 600 transitions, 11314 flow. Second operand 10 states and 168 transitions. [2024-06-21 17:54:47,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 638 transitions, 12756 flow [2024-06-21 17:54:50,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 638 transitions, 12426 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-21 17:54:50,476 INFO L231 Difference]: Finished difference. Result has 438 places, 600 transitions, 11296 flow [2024-06-21 17:54:50,476 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} [2024-06-21 17:54:50,476 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 397 predicate places. [2024-06-21 17:54:50,477 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 600 transitions, 11296 flow [2024-06-21 17:54:50,477 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) [2024-06-21 17:54:50,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:54:50,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:54:50,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 17:54:50,477 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)] === [2024-06-21 17:54:50,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:54:50,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1205298965, now seen corresponding path program 15 times [2024-06-21 17:54:50,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:54:50,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331700373] [2024-06-21 17:54:50,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:54:50,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:54:50,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:54:51,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:54:51,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:54:51,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331700373] [2024-06-21 17:54:51,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331700373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:54:51,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:54:51,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:54:51,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672438406] [2024-06-21 17:54:51,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:54:51,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:54:51,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:54:51,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:54:51,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:54:51,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:54:51,498 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) [2024-06-21 17:54:51,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:54:51,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:54:51,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:54:53,654 INFO L124 PetriNetUnfolderBase]: 5179/8093 cut-off events. [2024-06-21 17:54:53,654 INFO L125 PetriNetUnfolderBase]: For 638287/638297 co-relation queries the response was YES. [2024-06-21 17:54:53,762 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. [2024-06-21 17:54:53,797 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 479 selfloop transitions, 160 changer transitions 0/642 dead transitions. [2024-06-21 17:54:53,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 642 transitions, 12786 flow [2024-06-21 17:54:53,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:54:53,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:54:53,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-21 17:54:53,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43 [2024-06-21 17:54:53,798 INFO L175 Difference]: Start difference. First operand has 438 places, 600 transitions, 11296 flow. Second operand 10 states and 172 transitions. [2024-06-21 17:54:53,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 642 transitions, 12786 flow [2024-06-21 17:54:57,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 642 transitions, 12458 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 17:54:57,226 INFO L231 Difference]: Finished difference. Result has 439 places, 600 transitions, 11294 flow [2024-06-21 17:54:57,226 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} [2024-06-21 17:54:57,226 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 398 predicate places. [2024-06-21 17:54:57,227 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 600 transitions, 11294 flow [2024-06-21 17:54:57,227 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) [2024-06-21 17:54:57,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:54:57,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:54:57,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 17:54:57,227 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)] === [2024-06-21 17:54:57,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:54:57,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1064808161, now seen corresponding path program 16 times [2024-06-21 17:54:57,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:54:57,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946798088] [2024-06-21 17:54:57,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:54:57,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:54:57,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:54:58,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:54:58,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:54:58,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946798088] [2024-06-21 17:54:58,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946798088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:54:58,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:54:58,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:54:58,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609441108] [2024-06-21 17:54:58,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:54:58,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:54:58,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:54:58,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:54:58,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:54:58,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:54:58,309 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) [2024-06-21 17:54:58,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:54:58,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:54:58,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:55:00,504 INFO L124 PetriNetUnfolderBase]: 5159/8061 cut-off events. [2024-06-21 17:55:00,505 INFO L125 PetriNetUnfolderBase]: For 618189/618199 co-relation queries the response was YES. [2024-06-21 17:55:00,613 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. [2024-06-21 17:55:00,647 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 473 selfloop transitions, 165 changer transitions 0/641 dead transitions. [2024-06-21 17:55:00,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 641 transitions, 12644 flow [2024-06-21 17:55:00,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:55:00,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:55:00,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-21 17:55:00,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 17:55:00,648 INFO L175 Difference]: Start difference. First operand has 439 places, 600 transitions, 11294 flow. Second operand 10 states and 170 transitions. [2024-06-21 17:55:00,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 641 transitions, 12644 flow [2024-06-21 17:55:04,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 641 transitions, 12032 flow, removed 25 selfloop flow, removed 11 redundant places. [2024-06-21 17:55:04,188 INFO L231 Difference]: Finished difference. Result has 437 places, 599 transitions, 10874 flow [2024-06-21 17:55:04,188 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} [2024-06-21 17:55:04,188 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 396 predicate places. [2024-06-21 17:55:04,189 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 599 transitions, 10874 flow [2024-06-21 17:55:04,189 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) [2024-06-21 17:55:04,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:55:04,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:55:04,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 17:55:04,189 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)] === [2024-06-21 17:55:04,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:55:04,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1890154915, now seen corresponding path program 6 times [2024-06-21 17:55:04,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:55:04,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178898606] [2024-06-21 17:55:04,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:55:04,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:55:04,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:55:04,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:55:04,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:55:04,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178898606] [2024-06-21 17:55:04,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178898606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:55:04,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:55:04,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:55:04,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782999067] [2024-06-21 17:55:04,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:55:04,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:55:04,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:55:04,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:55:04,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:55:04,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:55:04,901 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) [2024-06-21 17:55:04,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:55:04,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:55:04,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:55:07,062 INFO L124 PetriNetUnfolderBase]: 5179/8096 cut-off events. [2024-06-21 17:55:07,062 INFO L125 PetriNetUnfolderBase]: For 611955/611959 co-relation queries the response was YES. [2024-06-21 17:55:07,168 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. [2024-06-21 17:55:07,205 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 492 selfloop transitions, 132 changer transitions 0/627 dead transitions. [2024-06-21 17:55:07,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 627 transitions, 12434 flow [2024-06-21 17:55:07,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:55:07,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:55:07,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 17:55:07,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392857142857143 [2024-06-21 17:55:07,207 INFO L175 Difference]: Start difference. First operand has 437 places, 599 transitions, 10874 flow. Second operand 7 states and 123 transitions. [2024-06-21 17:55:07,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 627 transitions, 12434 flow [2024-06-21 17:55:10,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 627 transitions, 12086 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-21 17:55:10,789 INFO L231 Difference]: Finished difference. Result has 435 places, 602 transitions, 10879 flow [2024-06-21 17:55:10,790 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} [2024-06-21 17:55:10,790 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 394 predicate places. [2024-06-21 17:55:10,790 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 602 transitions, 10879 flow [2024-06-21 17:55:10,790 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) [2024-06-21 17:55:10,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:55:10,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:55:10,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 17:55:10,791 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)] === [2024-06-21 17:55:10,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:55:10,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1829795105, now seen corresponding path program 7 times [2024-06-21 17:55:10,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:55:10,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634117106] [2024-06-21 17:55:10,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:55:10,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:55:10,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:55:11,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:55:11,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:55:11,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634117106] [2024-06-21 17:55:11,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634117106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:55:11,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:55:11,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:55:11,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736958265] [2024-06-21 17:55:11,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:55:11,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:55:11,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:55:11,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:55:11,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:55:11,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:55:11,363 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) [2024-06-21 17:55:11,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:55:11,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:55:11,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:55:13,469 INFO L124 PetriNetUnfolderBase]: 5199/8114 cut-off events. [2024-06-21 17:55:13,469 INFO L125 PetriNetUnfolderBase]: For 620782/620790 co-relation queries the response was YES. [2024-06-21 17:55:13,571 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. [2024-06-21 17:55:13,602 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 493 selfloop transitions, 130 changer transitions 0/626 dead transitions. [2024-06-21 17:55:13,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 626 transitions, 12429 flow [2024-06-21 17:55:13,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:55:13,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:55:13,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 17:55:13,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-21 17:55:13,603 INFO L175 Difference]: Start difference. First operand has 435 places, 602 transitions, 10879 flow. Second operand 7 states and 118 transitions. [2024-06-21 17:55:13,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 626 transitions, 12429 flow [2024-06-21 17:55:16,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 626 transitions, 12177 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-21 17:55:16,741 INFO L231 Difference]: Finished difference. Result has 435 places, 605 transitions, 10963 flow [2024-06-21 17:55:16,741 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} [2024-06-21 17:55:16,741 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 394 predicate places. [2024-06-21 17:55:16,741 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 605 transitions, 10963 flow [2024-06-21 17:55:16,742 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) [2024-06-21 17:55:16,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:55:16,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:55:16,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 17:55:16,742 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)] === [2024-06-21 17:55:16,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:55:16,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1113525575, now seen corresponding path program 8 times [2024-06-21 17:55:16,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:55:16,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105568928] [2024-06-21 17:55:16,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:55:16,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:55:16,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:55:17,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:55:17,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:55:17,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105568928] [2024-06-21 17:55:17,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105568928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:55:17,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:55:17,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:55:17,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019540755] [2024-06-21 17:55:17,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:55:17,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:55:17,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:55:17,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:55:17,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:55:17,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:55:17,313 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) [2024-06-21 17:55:17,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:55:17,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:55:17,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:55:19,368 INFO L124 PetriNetUnfolderBase]: 5187/8108 cut-off events. [2024-06-21 17:55:19,368 INFO L125 PetriNetUnfolderBase]: For 598982/598986 co-relation queries the response was YES. [2024-06-21 17:55:19,463 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. [2024-06-21 17:55:19,493 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 517 selfloop transitions, 106 changer transitions 0/626 dead transitions. [2024-06-21 17:55:19,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 626 transitions, 12295 flow [2024-06-21 17:55:19,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:55:19,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:55:19,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-21 17:55:19,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45416666666666666 [2024-06-21 17:55:19,495 INFO L175 Difference]: Start difference. First operand has 435 places, 605 transitions, 10963 flow. Second operand 6 states and 109 transitions. [2024-06-21 17:55:19,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 626 transitions, 12295 flow [2024-06-21 17:55:23,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 626 transitions, 12069 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-21 17:55:23,323 INFO L231 Difference]: Finished difference. Result has 436 places, 605 transitions, 11032 flow [2024-06-21 17:55:23,323 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} [2024-06-21 17:55:23,323 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 395 predicate places. [2024-06-21 17:55:23,323 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 605 transitions, 11032 flow [2024-06-21 17:55:23,324 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) [2024-06-21 17:55:23,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:55:23,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:55:23,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 17:55:23,324 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)] === [2024-06-21 17:55:23,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:55:23,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1210618760, now seen corresponding path program 1 times [2024-06-21 17:55:23,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:55:23,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961756675] [2024-06-21 17:55:23,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:55:23,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:55:23,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:55:23,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:55:23,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:55:23,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961756675] [2024-06-21 17:55:23,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961756675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:55:23,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:55:23,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:55:23,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052778667] [2024-06-21 17:55:23,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:55:23,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:55:23,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:55:23,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:55:23,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:55:23,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:55:23,998 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) [2024-06-21 17:55:23,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:55:23,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:55:23,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:55:26,104 INFO L124 PetriNetUnfolderBase]: 5095/8025 cut-off events. [2024-06-21 17:55:26,105 INFO L125 PetriNetUnfolderBase]: For 641028/641054 co-relation queries the response was YES. [2024-06-21 17:55:26,198 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. [2024-06-21 17:55:26,230 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 524 selfloop transitions, 50 changer transitions 0/643 dead transitions. [2024-06-21 17:55:26,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 643 transitions, 12968 flow [2024-06-21 17:55:26,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:55:26,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:55:26,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 17:55:26,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428125 [2024-06-21 17:55:26,231 INFO L175 Difference]: Start difference. First operand has 436 places, 605 transitions, 11032 flow. Second operand 8 states and 137 transitions. [2024-06-21 17:55:26,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 643 transitions, 12968 flow [2024-06-21 17:55:29,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 643 transitions, 12654 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 17:55:29,144 INFO L231 Difference]: Finished difference. Result has 440 places, 617 transitions, 11079 flow [2024-06-21 17:55:29,149 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} [2024-06-21 17:55:29,149 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 399 predicate places. [2024-06-21 17:55:29,150 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 617 transitions, 11079 flow [2024-06-21 17:55:29,150 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) [2024-06-21 17:55:29,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:55:29,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:55:29,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 17:55:29,150 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)] === [2024-06-21 17:55:29,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:55:29,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1692143758, now seen corresponding path program 1 times [2024-06-21 17:55:29,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:55:29,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765104704] [2024-06-21 17:55:29,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:55:29,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:55:29,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:55:29,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:55:29,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:55:29,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765104704] [2024-06-21 17:55:29,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765104704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:55:29,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:55:29,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:55:29,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668398425] [2024-06-21 17:55:29,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:55:29,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:55:29,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:55:29,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:55:29,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:55:29,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:55:29,685 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) [2024-06-21 17:55:29,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:55:29,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:55:29,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:55:31,930 INFO L124 PetriNetUnfolderBase]: 5212/8137 cut-off events. [2024-06-21 17:55:31,930 INFO L125 PetriNetUnfolderBase]: For 608537/608541 co-relation queries the response was YES. [2024-06-21 17:55:32,021 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. [2024-06-21 17:55:32,053 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 604 selfloop transitions, 43 changer transitions 0/650 dead transitions. [2024-06-21 17:55:32,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 650 transitions, 12614 flow [2024-06-21 17:55:32,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:55:32,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:55:32,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-06-21 17:55:32,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 17:55:32,054 INFO L175 Difference]: Start difference. First operand has 440 places, 617 transitions, 11079 flow. Second operand 9 states and 135 transitions. [2024-06-21 17:55:32,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 650 transitions, 12614 flow [2024-06-21 17:55:35,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 650 transitions, 12541 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-21 17:55:35,723 INFO L231 Difference]: Finished difference. Result has 449 places, 630 transitions, 11320 flow [2024-06-21 17:55:35,724 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} [2024-06-21 17:55:35,724 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 408 predicate places. [2024-06-21 17:55:35,724 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 630 transitions, 11320 flow [2024-06-21 17:55:35,724 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) [2024-06-21 17:55:35,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:55:35,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:55:35,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 17:55:35,725 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)] === [2024-06-21 17:55:35,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:55:35,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1210708970, now seen corresponding path program 2 times [2024-06-21 17:55:35,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:55:35,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725346010] [2024-06-21 17:55:35,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:55:35,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:55:35,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:55:36,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:55:36,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:55:36,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725346010] [2024-06-21 17:55:36,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725346010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:55:36,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:55:36,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:55:36,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676622570] [2024-06-21 17:55:36,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:55:36,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:55:36,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:55:36,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:55:36,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:55:36,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:55:36,447 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) [2024-06-21 17:55:36,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:55:36,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:55:36,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:55:38,719 INFO L124 PetriNetUnfolderBase]: 5110/8048 cut-off events. [2024-06-21 17:55:38,719 INFO L125 PetriNetUnfolderBase]: For 668556/668602 co-relation queries the response was YES. [2024-06-21 17:55:38,814 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. [2024-06-21 17:55:38,846 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 547 selfloop transitions, 37 changer transitions 0/653 dead transitions. [2024-06-21 17:55:38,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 653 transitions, 12620 flow [2024-06-21 17:55:38,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:55:38,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:55:38,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 17:55:38,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.403125 [2024-06-21 17:55:38,847 INFO L175 Difference]: Start difference. First operand has 449 places, 630 transitions, 11320 flow. Second operand 8 states and 129 transitions. [2024-06-21 17:55:38,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 653 transitions, 12620 flow [2024-06-21 17:55:42,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 653 transitions, 12499 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-21 17:55:42,337 INFO L231 Difference]: Finished difference. Result has 452 places, 633 transitions, 11321 flow [2024-06-21 17:55:42,338 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} [2024-06-21 17:55:42,338 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 411 predicate places. [2024-06-21 17:55:42,338 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 633 transitions, 11321 flow [2024-06-21 17:55:42,338 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) [2024-06-21 17:55:42,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:55:42,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:55:42,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 17:55:42,339 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)] === [2024-06-21 17:55:42,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:55:42,339 INFO L85 PathProgramCache]: Analyzing trace with hash 213356946, now seen corresponding path program 2 times [2024-06-21 17:55:42,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:55:42,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160445220] [2024-06-21 17:55:42,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:55:42,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:55:42,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:55:42,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:55:42,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:55:42,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160445220] [2024-06-21 17:55:42,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160445220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:55:42,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:55:42,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:55:42,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156644385] [2024-06-21 17:55:42,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:55:42,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:55:42,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:55:42,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:55:42,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:55:42,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:55:42,974 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) [2024-06-21 17:55:42,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:55:42,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:55:42,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:55:45,252 INFO L124 PetriNetUnfolderBase]: 5263/8208 cut-off events. [2024-06-21 17:55:45,253 INFO L125 PetriNetUnfolderBase]: For 641965/641969 co-relation queries the response was YES. [2024-06-21 17:55:45,356 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. [2024-06-21 17:55:45,389 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 603 selfloop transitions, 60 changer transitions 0/666 dead transitions. [2024-06-21 17:55:45,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 666 transitions, 13118 flow [2024-06-21 17:55:45,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:55:45,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:55:45,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 17:55:45,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-06-21 17:55:45,391 INFO L175 Difference]: Start difference. First operand has 452 places, 633 transitions, 11321 flow. Second operand 8 states and 127 transitions. [2024-06-21 17:55:45,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 666 transitions, 13118 flow [2024-06-21 17:55:48,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 666 transitions, 13024 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 17:55:48,695 INFO L231 Difference]: Finished difference. Result has 455 places, 645 transitions, 11589 flow [2024-06-21 17:55:48,695 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} [2024-06-21 17:55:48,696 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 414 predicate places. [2024-06-21 17:55:48,696 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 645 transitions, 11589 flow [2024-06-21 17:55:48,696 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) [2024-06-21 17:55:48,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:55:48,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:55:48,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 17:55:48,696 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)] === [2024-06-21 17:55:48,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:55:48,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1214428040, now seen corresponding path program 3 times [2024-06-21 17:55:48,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:55:48,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000661281] [2024-06-21 17:55:48,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:55:48,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:55:48,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:55:49,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:55:49,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:55:49,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000661281] [2024-06-21 17:55:49,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000661281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:55:49,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:55:49,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:55:49,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929984927] [2024-06-21 17:55:49,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:55:49,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:55:49,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:55:49,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:55:49,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:55:49,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:55:49,489 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) [2024-06-21 17:55:49,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:55:49,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:55:49,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:55:51,791 INFO L124 PetriNetUnfolderBase]: 5153/8109 cut-off events. [2024-06-21 17:55:51,791 INFO L125 PetriNetUnfolderBase]: For 696595/696639 co-relation queries the response was YES. [2024-06-21 17:55:51,890 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. [2024-06-21 17:55:51,923 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 561 selfloop transitions, 34 changer transitions 0/666 dead transitions. [2024-06-21 17:55:51,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 666 transitions, 13071 flow [2024-06-21 17:55:51,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:55:51,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:55:51,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 17:55:51,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-06-21 17:55:51,924 INFO L175 Difference]: Start difference. First operand has 455 places, 645 transitions, 11589 flow. Second operand 8 states and 127 transitions. [2024-06-21 17:55:51,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 666 transitions, 13071 flow [2024-06-21 17:55:55,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 666 transitions, 12945 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-21 17:55:55,130 INFO L231 Difference]: Finished difference. Result has 460 places, 648 transitions, 11585 flow [2024-06-21 17:55:55,130 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} [2024-06-21 17:55:55,131 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 419 predicate places. [2024-06-21 17:55:55,131 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 648 transitions, 11585 flow [2024-06-21 17:55:55,131 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) [2024-06-21 17:55:55,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:55:55,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:55:55,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 17:55:55,131 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)] === [2024-06-21 17:55:55,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:55:55,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1444382860, now seen corresponding path program 1 times [2024-06-21 17:55:55,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:55:55,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903356075] [2024-06-21 17:55:55,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:55:55,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:55:55,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:55:55,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:55:55,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:55:55,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903356075] [2024-06-21 17:55:55,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903356075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:55:55,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:55:55,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:55:55,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643788218] [2024-06-21 17:55:55,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:55:55,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:55:55,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:55:55,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:55:55,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:55:55,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:55:55,836 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) [2024-06-21 17:55:55,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:55:55,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:55:55,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:55:58,004 INFO L124 PetriNetUnfolderBase]: 5275/8237 cut-off events. [2024-06-21 17:55:58,005 INFO L125 PetriNetUnfolderBase]: For 666245/666245 co-relation queries the response was YES. [2024-06-21 17:55:58,102 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. [2024-06-21 17:55:58,133 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 629 selfloop transitions, 27 changer transitions 0/659 dead transitions. [2024-06-21 17:55:58,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 659 transitions, 12947 flow [2024-06-21 17:55:58,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:55:58,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:55:58,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2024-06-21 17:55:58,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 17:55:58,134 INFO L175 Difference]: Start difference. First operand has 460 places, 648 transitions, 11585 flow. Second operand 5 states and 85 transitions. [2024-06-21 17:55:58,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 659 transitions, 12947 flow [2024-06-21 17:56:01,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 659 transitions, 12819 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-21 17:56:01,580 INFO L231 Difference]: Finished difference. Result has 459 places, 648 transitions, 11532 flow [2024-06-21 17:56:01,581 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} [2024-06-21 17:56:01,581 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 418 predicate places. [2024-06-21 17:56:01,581 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 648 transitions, 11532 flow [2024-06-21 17:56:01,581 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) [2024-06-21 17:56:01,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:56:01,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:56:01,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 17:56:01,582 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)] === [2024-06-21 17:56:01,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:56:01,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1469536012, now seen corresponding path program 4 times [2024-06-21 17:56:01,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:56:01,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039284030] [2024-06-21 17:56:01,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:56:01,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:56:01,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:56:02,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:56:02,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:56:02,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039284030] [2024-06-21 17:56:02,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039284030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:56:02,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:56:02,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:56:02,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521737165] [2024-06-21 17:56:02,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:56:02,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:56:02,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:56:02,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:56:02,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:56:02,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:56:02,297 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) [2024-06-21 17:56:02,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:56:02,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:56:02,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:56:04,512 INFO L124 PetriNetUnfolderBase]: 5150/8106 cut-off events. [2024-06-21 17:56:04,513 INFO L125 PetriNetUnfolderBase]: For 711441/711465 co-relation queries the response was YES. [2024-06-21 17:56:04,610 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. [2024-06-21 17:56:04,641 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 561 selfloop transitions, 38 changer transitions 0/670 dead transitions. [2024-06-21 17:56:04,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 670 transitions, 13006 flow [2024-06-21 17:56:04,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:56:04,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:56:04,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 17:56:04,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-21 17:56:04,643 INFO L175 Difference]: Start difference. First operand has 459 places, 648 transitions, 11532 flow. Second operand 7 states and 122 transitions. [2024-06-21 17:56:04,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 670 transitions, 13006 flow [2024-06-21 17:56:08,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 670 transitions, 12936 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 17:56:08,570 INFO L231 Difference]: Finished difference. Result has 462 places, 648 transitions, 11549 flow [2024-06-21 17:56:08,570 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} [2024-06-21 17:56:08,570 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 421 predicate places. [2024-06-21 17:56:08,570 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 648 transitions, 11549 flow [2024-06-21 17:56:08,571 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) [2024-06-21 17:56:08,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:56:08,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:56:08,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 17:56:08,571 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)] === [2024-06-21 17:56:08,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:56:08,571 INFO L85 PathProgramCache]: Analyzing trace with hash -147735180, now seen corresponding path program 1 times [2024-06-21 17:56:08,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:56:08,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30339569] [2024-06-21 17:56:08,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:56:08,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:56:08,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:56:09,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:56:09,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:56:09,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30339569] [2024-06-21 17:56:09,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30339569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:56:09,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:56:09,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:56:09,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6973399] [2024-06-21 17:56:09,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:56:09,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:56:09,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:56:09,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:56:09,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:56:09,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:56:09,287 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) [2024-06-21 17:56:09,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:56:09,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:56:09,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:56:11,682 INFO L124 PetriNetUnfolderBase]: 5320/8293 cut-off events. [2024-06-21 17:56:11,683 INFO L125 PetriNetUnfolderBase]: For 726006/726014 co-relation queries the response was YES. [2024-06-21 17:56:11,785 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. [2024-06-21 17:56:11,817 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 539 selfloop transitions, 137 changer transitions 0/679 dead transitions. [2024-06-21 17:56:11,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 679 transitions, 13101 flow [2024-06-21 17:56:11,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:56:11,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:56:11,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 17:56:11,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 17:56:11,818 INFO L175 Difference]: Start difference. First operand has 462 places, 648 transitions, 11549 flow. Second operand 9 states and 150 transitions. [2024-06-21 17:56:11,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 679 transitions, 13101 flow [2024-06-21 17:56:15,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 679 transitions, 12998 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 17:56:15,246 INFO L231 Difference]: Finished difference. Result has 465 places, 649 transitions, 11748 flow [2024-06-21 17:56:15,247 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} [2024-06-21 17:56:15,247 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 424 predicate places. [2024-06-21 17:56:15,247 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 649 transitions, 11748 flow [2024-06-21 17:56:15,247 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) [2024-06-21 17:56:15,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:56:15,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:56:15,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 17:56:15,248 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)] === [2024-06-21 17:56:15,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:56:15,248 INFO L85 PathProgramCache]: Analyzing trace with hash 773151072, now seen corresponding path program 1 times [2024-06-21 17:56:15,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:56:15,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68079101] [2024-06-21 17:56:15,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:56:15,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:56:15,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:56:15,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:56:15,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:56:15,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68079101] [2024-06-21 17:56:15,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68079101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:56:15,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:56:15,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:56:15,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645458006] [2024-06-21 17:56:15,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:56:15,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:56:15,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:56:15,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:56:15,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:56:15,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:56:15,817 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) [2024-06-21 17:56:15,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:56:15,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:56:15,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:56:18,099 INFO L124 PetriNetUnfolderBase]: 5333/8314 cut-off events. [2024-06-21 17:56:18,100 INFO L125 PetriNetUnfolderBase]: For 700645/700649 co-relation queries the response was YES. [2024-06-21 17:56:18,207 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. [2024-06-21 17:56:18,243 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 632 selfloop transitions, 46 changer transitions 0/681 dead transitions. [2024-06-21 17:56:18,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 681 transitions, 13592 flow [2024-06-21 17:56:18,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:56:18,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:56:18,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-21 17:56:18,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39444444444444443 [2024-06-21 17:56:18,244 INFO L175 Difference]: Start difference. First operand has 465 places, 649 transitions, 11748 flow. Second operand 9 states and 142 transitions. [2024-06-21 17:56:18,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 681 transitions, 13592 flow [2024-06-21 17:56:21,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 681 transitions, 13322 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 17:56:21,678 INFO L231 Difference]: Finished difference. Result has 467 places, 655 transitions, 11794 flow [2024-06-21 17:56:21,678 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} [2024-06-21 17:56:21,678 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 426 predicate places. [2024-06-21 17:56:21,679 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 655 transitions, 11794 flow [2024-06-21 17:56:21,679 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) [2024-06-21 17:56:21,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:56:21,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:56:21,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 17:56:21,679 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)] === [2024-06-21 17:56:21,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:56:21,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1628740182, now seen corresponding path program 2 times [2024-06-21 17:56:21,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:56:21,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706824820] [2024-06-21 17:56:21,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:56:21,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:56:21,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:56:22,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:56:22,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:56:22,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706824820] [2024-06-21 17:56:22,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706824820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:56:22,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:56:22,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:56:22,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521686832] [2024-06-21 17:56:22,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:56:22,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:56:22,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:56:22,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:56:22,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:56:22,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:56:22,372 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) [2024-06-21 17:56:22,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:56:22,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:56:22,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:56:24,637 INFO L124 PetriNetUnfolderBase]: 5338/8321 cut-off events. [2024-06-21 17:56:24,637 INFO L125 PetriNetUnfolderBase]: For 714969/714973 co-relation queries the response was YES. [2024-06-21 17:56:24,745 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. [2024-06-21 17:56:24,780 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 636 selfloop transitions, 41 changer transitions 0/680 dead transitions. [2024-06-21 17:56:24,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 680 transitions, 13342 flow [2024-06-21 17:56:24,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:56:24,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:56:24,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-21 17:56:24,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38055555555555554 [2024-06-21 17:56:24,781 INFO L175 Difference]: Start difference. First operand has 467 places, 655 transitions, 11794 flow. Second operand 9 states and 137 transitions. [2024-06-21 17:56:24,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 680 transitions, 13342 flow [2024-06-21 17:56:28,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 680 transitions, 13095 flow, removed 70 selfloop flow, removed 4 redundant places. [2024-06-21 17:56:28,383 INFO L231 Difference]: Finished difference. Result has 472 places, 658 transitions, 11753 flow [2024-06-21 17:56:28,383 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} [2024-06-21 17:56:28,383 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 431 predicate places. [2024-06-21 17:56:28,384 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 658 transitions, 11753 flow [2024-06-21 17:56:28,384 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) [2024-06-21 17:56:28,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:56:28,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:56:28,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 17:56:28,384 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)] === [2024-06-21 17:56:28,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:56:28,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1684756582, now seen corresponding path program 3 times [2024-06-21 17:56:28,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:56:28,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927451730] [2024-06-21 17:56:28,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:56:28,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:56:28,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:56:28,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:56:28,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:56:28,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927451730] [2024-06-21 17:56:28,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927451730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:56:28,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:56:28,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:56:28,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685662147] [2024-06-21 17:56:28,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:56:28,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:56:28,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:56:28,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:56:28,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:56:29,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:56:29,006 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) [2024-06-21 17:56:29,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:56:29,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:56:29,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:56:31,304 INFO L124 PetriNetUnfolderBase]: 5335/8317 cut-off events. [2024-06-21 17:56:31,304 INFO L125 PetriNetUnfolderBase]: For 722592/722596 co-relation queries the response was YES. [2024-06-21 17:56:31,410 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. [2024-06-21 17:56:31,442 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 638 selfloop transitions, 36 changer transitions 0/677 dead transitions. [2024-06-21 17:56:31,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 677 transitions, 13167 flow [2024-06-21 17:56:31,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:56:31,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:56:31,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 132 transitions. [2024-06-21 17:56:31,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-21 17:56:31,443 INFO L175 Difference]: Start difference. First operand has 472 places, 658 transitions, 11753 flow. Second operand 9 states and 132 transitions. [2024-06-21 17:56:31,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 677 transitions, 13167 flow [2024-06-21 17:56:35,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 677 transitions, 12947 flow, removed 72 selfloop flow, removed 6 redundant places. [2024-06-21 17:56:35,093 INFO L231 Difference]: Finished difference. Result has 475 places, 658 transitions, 11611 flow [2024-06-21 17:56:35,094 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} [2024-06-21 17:56:35,094 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 434 predicate places. [2024-06-21 17:56:35,094 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 658 transitions, 11611 flow [2024-06-21 17:56:35,094 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) [2024-06-21 17:56:35,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:56:35,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:56:35,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 17:56:35,095 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)] === [2024-06-21 17:56:35,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:56:35,095 INFO L85 PathProgramCache]: Analyzing trace with hash 950402748, now seen corresponding path program 3 times [2024-06-21 17:56:35,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:56:35,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719808699] [2024-06-21 17:56:35,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:56:35,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:56:35,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:56:35,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:56:35,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:56:35,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719808699] [2024-06-21 17:56:35,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719808699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:56:35,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:56:35,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:56:35,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990171991] [2024-06-21 17:56:35,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:56:35,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:56:35,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:56:35,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:56:35,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:56:35,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:56:35,696 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) [2024-06-21 17:56:35,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:56:35,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:56:35,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:56:37,973 INFO L124 PetriNetUnfolderBase]: 5345/8331 cut-off events. [2024-06-21 17:56:37,973 INFO L125 PetriNetUnfolderBase]: For 735275/735279 co-relation queries the response was YES. [2024-06-21 17:56:38,088 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. [2024-06-21 17:56:38,122 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 632 selfloop transitions, 47 changer transitions 0/682 dead transitions. [2024-06-21 17:56:38,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 682 transitions, 13117 flow [2024-06-21 17:56:38,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:56:38,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:56:38,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-21 17:56:38,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-21 17:56:38,132 INFO L175 Difference]: Start difference. First operand has 475 places, 658 transitions, 11611 flow. Second operand 9 states and 138 transitions. [2024-06-21 17:56:38,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 682 transitions, 13117 flow [2024-06-21 17:56:42,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 682 transitions, 13013 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 17:56:42,187 INFO L231 Difference]: Finished difference. Result has 476 places, 661 transitions, 11679 flow [2024-06-21 17:56:42,187 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} [2024-06-21 17:56:42,187 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 435 predicate places. [2024-06-21 17:56:42,187 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 661 transitions, 11679 flow [2024-06-21 17:56:42,188 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) [2024-06-21 17:56:42,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:56:42,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:56:42,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 17:56:42,188 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)] === [2024-06-21 17:56:42,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:56:42,188 INFO L85 PathProgramCache]: Analyzing trace with hash 125976280, now seen corresponding path program 4 times [2024-06-21 17:56:42,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:56:42,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371075072] [2024-06-21 17:56:42,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:56:42,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:56:42,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:56:42,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:56:42,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:56:42,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371075072] [2024-06-21 17:56:42,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371075072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:56:42,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:56:42,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:56:42,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002627845] [2024-06-21 17:56:42,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:56:42,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:56:42,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:56:42,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:56:42,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:56:42,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:56:42,821 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) [2024-06-21 17:56:42,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:56:42,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:56:42,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:56:45,101 INFO L124 PetriNetUnfolderBase]: 5358/8349 cut-off events. [2024-06-21 17:56:45,101 INFO L125 PetriNetUnfolderBase]: For 751513/751517 co-relation queries the response was YES. [2024-06-21 17:56:45,209 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. [2024-06-21 17:56:45,247 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 622 selfloop transitions, 64 changer transitions 0/689 dead transitions. [2024-06-21 17:56:45,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 689 transitions, 13547 flow [2024-06-21 17:56:45,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:56:45,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:56:45,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-21 17:56:45,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39375 [2024-06-21 17:56:45,249 INFO L175 Difference]: Start difference. First operand has 476 places, 661 transitions, 11679 flow. Second operand 8 states and 126 transitions. [2024-06-21 17:56:45,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 689 transitions, 13547 flow [2024-06-21 17:56:49,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 689 transitions, 13403 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-21 17:56:49,601 INFO L231 Difference]: Finished difference. Result has 477 places, 667 transitions, 11903 flow [2024-06-21 17:56:49,601 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} [2024-06-21 17:56:49,602 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 436 predicate places. [2024-06-21 17:56:49,602 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 667 transitions, 11903 flow [2024-06-21 17:56:49,602 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) [2024-06-21 17:56:49,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:56:49,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:56:49,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 17:56:49,602 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)] === [2024-06-21 17:56:49,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:56:49,603 INFO L85 PathProgramCache]: Analyzing trace with hash 213356760, now seen corresponding path program 5 times [2024-06-21 17:56:49,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:56:49,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602779084] [2024-06-21 17:56:49,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:56:49,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:56:49,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:56:50,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:56:50,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:56:50,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602779084] [2024-06-21 17:56:50,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602779084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:56:50,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:56:50,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:56:50,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972958530] [2024-06-21 17:56:50,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:56:50,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:56:50,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:56:50,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:56:50,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:56:50,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:56:50,257 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) [2024-06-21 17:56:50,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:56:50,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:56:50,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:56:52,583 INFO L124 PetriNetUnfolderBase]: 5363/8356 cut-off events. [2024-06-21 17:56:52,584 INFO L125 PetriNetUnfolderBase]: For 768644/768648 co-relation queries the response was YES. [2024-06-21 17:56:52,705 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. [2024-06-21 17:56:52,741 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 634 selfloop transitions, 51 changer transitions 0/688 dead transitions. [2024-06-21 17:56:52,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 688 transitions, 13461 flow [2024-06-21 17:56:52,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:56:52,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:56:52,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-21 17:56:52,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.378125 [2024-06-21 17:56:52,742 INFO L175 Difference]: Start difference. First operand has 477 places, 667 transitions, 11903 flow. Second operand 8 states and 121 transitions. [2024-06-21 17:56:52,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 688 transitions, 13461 flow [2024-06-21 17:56:56,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 688 transitions, 13255 flow, removed 74 selfloop flow, removed 5 redundant places. [2024-06-21 17:56:56,861 INFO L231 Difference]: Finished difference. Result has 480 places, 670 transitions, 11933 flow [2024-06-21 17:56:56,876 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} [2024-06-21 17:56:56,877 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 439 predicate places. [2024-06-21 17:56:56,877 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 670 transitions, 11933 flow [2024-06-21 17:56:56,877 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) [2024-06-21 17:56:56,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:56:56,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:56:56,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 17:56:56,877 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)] === [2024-06-21 17:56:56,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:56:56,878 INFO L85 PathProgramCache]: Analyzing trace with hash 217998390, now seen corresponding path program 6 times [2024-06-21 17:56:56,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:56:56,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38024066] [2024-06-21 17:56:56,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:56:56,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:56:56,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:56:57,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:56:57,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:56:57,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38024066] [2024-06-21 17:56:57,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38024066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:56:57,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:56:57,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:56:57,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406353081] [2024-06-21 17:56:57,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:56:57,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:56:57,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:56:57,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:56:57,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:56:57,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:56:57,489 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) [2024-06-21 17:56:57,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:56:57,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:56:57,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:56:59,793 INFO L124 PetriNetUnfolderBase]: 5373/8370 cut-off events. [2024-06-21 17:56:59,793 INFO L125 PetriNetUnfolderBase]: For 764632/764636 co-relation queries the response was YES. [2024-06-21 17:56:59,916 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. [2024-06-21 17:56:59,950 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 647 selfloop transitions, 41 changer transitions 0/691 dead transitions. [2024-06-21 17:56:59,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 691 transitions, 13517 flow [2024-06-21 17:56:59,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:56:59,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:56:59,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 117 transitions. [2024-06-21 17:56:59,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.365625 [2024-06-21 17:56:59,952 INFO L175 Difference]: Start difference. First operand has 480 places, 670 transitions, 11933 flow. Second operand 8 states and 117 transitions. [2024-06-21 17:56:59,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 691 transitions, 13517 flow [2024-06-21 17:57:03,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 691 transitions, 13315 flow, removed 43 selfloop flow, removed 8 redundant places. [2024-06-21 17:57:03,851 INFO L231 Difference]: Finished difference. Result has 481 places, 676 transitions, 11998 flow [2024-06-21 17:57:03,852 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} [2024-06-21 17:57:03,852 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 440 predicate places. [2024-06-21 17:57:03,852 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 676 transitions, 11998 flow [2024-06-21 17:57:03,852 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) [2024-06-21 17:57:03,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:03,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:03,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 17:57:03,853 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)] === [2024-06-21 17:57:03,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:03,853 INFO L85 PathProgramCache]: Analyzing trace with hash 64882080, now seen corresponding path program 4 times [2024-06-21 17:57:03,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:03,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975254396] [2024-06-21 17:57:03,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:03,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:03,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:04,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:04,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:04,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975254396] [2024-06-21 17:57:04,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975254396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:04,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:04,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:57:04,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877998759] [2024-06-21 17:57:04,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:04,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:57:04,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:04,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:57:04,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:57:04,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:57:04,383 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) [2024-06-21 17:57:04,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:04,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:57:04,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:06,662 INFO L124 PetriNetUnfolderBase]: 5383/8384 cut-off events. [2024-06-21 17:57:06,663 INFO L125 PetriNetUnfolderBase]: For 769155/769159 co-relation queries the response was YES. [2024-06-21 17:57:06,781 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. [2024-06-21 17:57:06,814 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 646 selfloop transitions, 47 changer transitions 0/696 dead transitions. [2024-06-21 17:57:06,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 696 transitions, 13523 flow [2024-06-21 17:57:06,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:57:06,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:57:06,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-21 17:57:06,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 17:57:06,816 INFO L175 Difference]: Start difference. First operand has 481 places, 676 transitions, 11998 flow. Second operand 8 states and 120 transitions. [2024-06-21 17:57:06,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 696 transitions, 13523 flow [2024-06-21 17:57:11,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 696 transitions, 13364 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-21 17:57:11,071 INFO L231 Difference]: Finished difference. Result has 483 places, 680 transitions, 12026 flow [2024-06-21 17:57:11,072 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} [2024-06-21 17:57:11,072 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 442 predicate places. [2024-06-21 17:57:11,072 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 680 transitions, 12026 flow [2024-06-21 17:57:11,072 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) [2024-06-21 17:57:11,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:11,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:11,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 17:57:11,073 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)] === [2024-06-21 17:57:11,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:11,073 INFO L85 PathProgramCache]: Analyzing trace with hash 217998576, now seen corresponding path program 5 times [2024-06-21 17:57:11,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:11,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953279359] [2024-06-21 17:57:11,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:11,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:11,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:11,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:11,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:11,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953279359] [2024-06-21 17:57:11,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953279359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:11,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:11,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:57:11,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643188187] [2024-06-21 17:57:11,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:11,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:57:11,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:11,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:57:11,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:57:11,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:57:11,619 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) [2024-06-21 17:57:11,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:11,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:57:11,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:13,873 INFO L124 PetriNetUnfolderBase]: 5393/8398 cut-off events. [2024-06-21 17:57:13,873 INFO L125 PetriNetUnfolderBase]: For 770051/770055 co-relation queries the response was YES. [2024-06-21 17:57:13,989 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. [2024-06-21 17:57:14,023 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 641 selfloop transitions, 56 changer transitions 0/700 dead transitions. [2024-06-21 17:57:14,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 700 transitions, 13568 flow [2024-06-21 17:57:14,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:57:14,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:57:14,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-21 17:57:14,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.384375 [2024-06-21 17:57:14,024 INFO L175 Difference]: Start difference. First operand has 483 places, 680 transitions, 12026 flow. Second operand 8 states and 123 transitions. [2024-06-21 17:57:14,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 700 transitions, 13568 flow [2024-06-21 17:57:18,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 700 transitions, 13457 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-21 17:57:18,383 INFO L231 Difference]: Finished difference. Result has 487 places, 683 transitions, 12121 flow [2024-06-21 17:57:18,383 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} [2024-06-21 17:57:18,383 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 446 predicate places. [2024-06-21 17:57:18,383 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 683 transitions, 12121 flow [2024-06-21 17:57:18,384 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) [2024-06-21 17:57:18,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:18,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:18,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 17:57:18,384 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)] === [2024-06-21 17:57:18,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:18,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1209971240, now seen corresponding path program 1 times [2024-06-21 17:57:18,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:18,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352320957] [2024-06-21 17:57:18,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:18,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:18,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:19,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:19,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:19,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352320957] [2024-06-21 17:57:19,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352320957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:19,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:19,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:57:19,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456782332] [2024-06-21 17:57:19,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:19,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:57:19,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:19,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:57:19,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:57:19,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:57:19,302 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) [2024-06-21 17:57:19,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:19,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:57:19,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:21,757 INFO L124 PetriNetUnfolderBase]: 5401/8410 cut-off events. [2024-06-21 17:57:21,757 INFO L125 PetriNetUnfolderBase]: For 784771/784775 co-relation queries the response was YES. [2024-06-21 17:57:21,878 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. [2024-06-21 17:57:21,913 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 644 selfloop transitions, 55 changer transitions 0/702 dead transitions. [2024-06-21 17:57:21,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 702 transitions, 13637 flow [2024-06-21 17:57:21,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:57:21,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:57:21,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-21 17:57:21,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38125 [2024-06-21 17:57:21,915 INFO L175 Difference]: Start difference. First operand has 487 places, 683 transitions, 12121 flow. Second operand 8 states and 122 transitions. [2024-06-21 17:57:21,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 702 transitions, 13637 flow [2024-06-21 17:57:26,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 702 transitions, 13465 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-21 17:57:26,765 INFO L231 Difference]: Finished difference. Result has 489 places, 686 transitions, 12134 flow [2024-06-21 17:57:26,765 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} [2024-06-21 17:57:26,765 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 448 predicate places. [2024-06-21 17:57:26,765 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 686 transitions, 12134 flow [2024-06-21 17:57:26,766 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) [2024-06-21 17:57:26,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:26,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:26,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 17:57:26,766 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)] === [2024-06-21 17:57:26,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:26,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1362064330, now seen corresponding path program 7 times [2024-06-21 17:57:26,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:26,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909189338] [2024-06-21 17:57:26,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:26,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:26,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:27,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:27,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:27,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909189338] [2024-06-21 17:57:27,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909189338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:27,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:27,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:57:27,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743342286] [2024-06-21 17:57:27,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:27,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:57:27,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:27,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:57:27,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:57:27,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:57:27,410 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) [2024-06-21 17:57:27,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:27,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:57:27,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:29,651 INFO L124 PetriNetUnfolderBase]: 5414/8432 cut-off events. [2024-06-21 17:57:29,652 INFO L125 PetriNetUnfolderBase]: For 789516/789524 co-relation queries the response was YES. [2024-06-21 17:57:29,786 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. [2024-06-21 17:57:29,825 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 628 selfloop transitions, 93 changer transitions 0/724 dead transitions. [2024-06-21 17:57:29,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 724 transitions, 14653 flow [2024-06-21 17:57:29,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:57:29,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:57:29,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 17:57:29,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.403125 [2024-06-21 17:57:29,827 INFO L175 Difference]: Start difference. First operand has 489 places, 686 transitions, 12134 flow. Second operand 8 states and 129 transitions. [2024-06-21 17:57:29,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 724 transitions, 14653 flow [2024-06-21 17:57:34,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 724 transitions, 14496 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 17:57:34,815 INFO L231 Difference]: Finished difference. Result has 492 places, 702 transitions, 12673 flow [2024-06-21 17:57:34,815 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} [2024-06-21 17:57:34,830 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 451 predicate places. [2024-06-21 17:57:34,830 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 702 transitions, 12673 flow [2024-06-21 17:57:34,830 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) [2024-06-21 17:57:34,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:34,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:34,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 17:57:34,831 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)] === [2024-06-21 17:57:34,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:34,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1361944174, now seen corresponding path program 6 times [2024-06-21 17:57:34,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:34,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815432025] [2024-06-21 17:57:34,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:34,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:34,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:35,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:35,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:35,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815432025] [2024-06-21 17:57:35,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815432025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:35,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:35,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:57:35,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755976328] [2024-06-21 17:57:35,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:35,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:57:35,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:35,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:57:35,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:57:35,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:57:35,437 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) [2024-06-21 17:57:35,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:35,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:57:35,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:37,783 INFO L124 PetriNetUnfolderBase]: 5437/8464 cut-off events. [2024-06-21 17:57:37,784 INFO L125 PetriNetUnfolderBase]: For 817071/817079 co-relation queries the response was YES. [2024-06-21 17:57:37,913 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. [2024-06-21 17:57:37,950 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 639 selfloop transitions, 90 changer transitions 0/732 dead transitions. [2024-06-21 17:57:37,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 732 transitions, 14798 flow [2024-06-21 17:57:37,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:57:37,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:57:37,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-21 17:57:37,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 17:57:37,952 INFO L175 Difference]: Start difference. First operand has 492 places, 702 transitions, 12673 flow. Second operand 8 states and 128 transitions. [2024-06-21 17:57:37,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 732 transitions, 14798 flow [2024-06-21 17:57:43,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 732 transitions, 14593 flow, removed 90 selfloop flow, removed 2 redundant places. [2024-06-21 17:57:43,347 INFO L231 Difference]: Finished difference. Result has 499 places, 711 transitions, 12861 flow [2024-06-21 17:57:43,348 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} [2024-06-21 17:57:43,348 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 458 predicate places. [2024-06-21 17:57:43,348 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 711 transitions, 12861 flow [2024-06-21 17:57:43,348 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) [2024-06-21 17:57:43,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:43,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:43,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 17:57:43,349 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)] === [2024-06-21 17:57:43,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:43,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1361944360, now seen corresponding path program 8 times [2024-06-21 17:57:43,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:43,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197910422] [2024-06-21 17:57:43,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:43,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:43,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:43,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:43,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:43,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197910422] [2024-06-21 17:57:43,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197910422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:43,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:43,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:57:43,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502820591] [2024-06-21 17:57:43,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:43,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:57:43,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:43,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:57:43,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:57:44,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:57:44,087 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) [2024-06-21 17:57:44,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:44,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:57:44,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:46,406 INFO L124 PetriNetUnfolderBase]: 5442/8471 cut-off events. [2024-06-21 17:57:46,406 INFO L125 PetriNetUnfolderBase]: For 824357/824365 co-relation queries the response was YES. [2024-06-21 17:57:46,544 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. [2024-06-21 17:57:46,582 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 665 selfloop transitions, 62 changer transitions 0/730 dead transitions. [2024-06-21 17:57:46,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 730 transitions, 14469 flow [2024-06-21 17:57:46,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:57:46,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:57:46,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-21 17:57:46,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 17:57:46,583 INFO L175 Difference]: Start difference. First operand has 499 places, 711 transitions, 12861 flow. Second operand 8 states and 120 transitions. [2024-06-21 17:57:46,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 730 transitions, 14469 flow [2024-06-21 17:57:52,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 730 transitions, 14218 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-21 17:57:52,307 INFO L231 Difference]: Finished difference. Result has 503 places, 714 transitions, 12836 flow [2024-06-21 17:57:52,308 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} [2024-06-21 17:57:52,308 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 462 predicate places. [2024-06-21 17:57:52,308 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 714 transitions, 12836 flow [2024-06-21 17:57:52,308 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) [2024-06-21 17:57:52,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:52,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:52,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 17:57:52,309 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)] === [2024-06-21 17:57:52,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:52,309 INFO L85 PathProgramCache]: Analyzing trace with hash 632926824, now seen corresponding path program 9 times [2024-06-21 17:57:52,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:52,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052437052] [2024-06-21 17:57:52,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:52,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:52,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:52,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:52,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:52,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052437052] [2024-06-21 17:57:52,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052437052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:52,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:52,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:57:52,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941638112] [2024-06-21 17:57:52,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:52,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:57:52,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:52,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:57:52,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:57:52,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:57:52,877 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) [2024-06-21 17:57:52,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:52,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:57:52,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:55,178 INFO L124 PetriNetUnfolderBase]: 5447/8478 cut-off events. [2024-06-21 17:57:55,178 INFO L125 PetriNetUnfolderBase]: For 836470/836478 co-relation queries the response was YES. [2024-06-21 17:57:55,322 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. [2024-06-21 17:57:55,361 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 626 selfloop transitions, 109 changer transitions 0/738 dead transitions. [2024-06-21 17:57:55,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 738 transitions, 14870 flow [2024-06-21 17:57:55,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:57:55,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:57:55,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 17:57:55,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-06-21 17:57:55,362 INFO L175 Difference]: Start difference. First operand has 503 places, 714 transitions, 12836 flow. Second operand 8 states and 127 transitions. [2024-06-21 17:57:55,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 738 transitions, 14870 flow [2024-06-21 17:58:01,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 738 transitions, 14664 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-21 17:58:01,536 INFO L231 Difference]: Finished difference. Result has 504 places, 717 transitions, 12946 flow [2024-06-21 17:58:01,536 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} [2024-06-21 17:58:01,537 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 463 predicate places. [2024-06-21 17:58:01,537 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 717 transitions, 12946 flow [2024-06-21 17:58:01,537 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) [2024-06-21 17:58:01,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:01,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:01,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 17:58:01,537 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)] === [2024-06-21 17:58:01,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:01,538 INFO L85 PathProgramCache]: Analyzing trace with hash 644354664, now seen corresponding path program 10 times [2024-06-21 17:58:01,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:01,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735524355] [2024-06-21 17:58:01,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:01,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:01,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:02,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:02,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:02,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735524355] [2024-06-21 17:58:02,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735524355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:02,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:02,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:02,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137945205] [2024-06-21 17:58:02,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:02,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:02,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:02,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:02,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:02,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:58:02,109 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) [2024-06-21 17:58:02,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:02,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:58:02,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:04,334 INFO L124 PetriNetUnfolderBase]: 5452/8485 cut-off events. [2024-06-21 17:58:04,335 INFO L125 PetriNetUnfolderBase]: For 851544/851552 co-relation queries the response was YES. [2024-06-21 17:58:04,464 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. [2024-06-21 17:58:04,504 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 621 selfloop transitions, 114 changer transitions 0/738 dead transitions. [2024-06-21 17:58:04,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 738 transitions, 14811 flow [2024-06-21 17:58:04,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:58:04,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:58:04,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-21 17:58:04,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.384375 [2024-06-21 17:58:04,511 INFO L175 Difference]: Start difference. First operand has 504 places, 717 transitions, 12946 flow. Second operand 8 states and 123 transitions. [2024-06-21 17:58:04,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 738 transitions, 14811 flow [2024-06-21 17:58:11,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 738 transitions, 14498 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-21 17:58:11,783 INFO L231 Difference]: Finished difference. Result has 506 places, 721 transitions, 13000 flow [2024-06-21 17:58:11,783 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} [2024-06-21 17:58:11,783 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 465 predicate places. [2024-06-21 17:58:11,784 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 721 transitions, 13000 flow [2024-06-21 17:58:11,784 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) [2024-06-21 17:58:11,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:11,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:11,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 17:58:11,784 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)] === [2024-06-21 17:58:11,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:11,784 INFO L85 PathProgramCache]: Analyzing trace with hash 415334910, now seen corresponding path program 7 times [2024-06-21 17:58:11,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:11,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55053753] [2024-06-21 17:58:11,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:11,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:11,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:12,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:12,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:12,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55053753] [2024-06-21 17:58:12,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55053753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:12,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:12,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:12,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474014205] [2024-06-21 17:58:12,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:12,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:12,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:12,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:12,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:12,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:58:12,384 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) [2024-06-21 17:58:12,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:12,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:58:12,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:14,704 INFO L124 PetriNetUnfolderBase]: 5462/8506 cut-off events. [2024-06-21 17:58:14,704 INFO L125 PetriNetUnfolderBase]: For 873813/873813 co-relation queries the response was YES. [2024-06-21 17:58:14,849 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. [2024-06-21 17:58:14,887 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 711 selfloop transitions, 27 changer transitions 0/741 dead transitions. [2024-06-21 17:58:14,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 741 transitions, 14625 flow [2024-06-21 17:58:14,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:58:14,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:58:14,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-21 17:58:14,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.371875 [2024-06-21 17:58:14,889 INFO L175 Difference]: Start difference. First operand has 506 places, 721 transitions, 13000 flow. Second operand 8 states and 119 transitions. [2024-06-21 17:58:14,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 741 transitions, 14625 flow [2024-06-21 17:58:21,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 741 transitions, 14373 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-21 17:58:21,061 INFO L231 Difference]: Finished difference. Result has 511 places, 725 transitions, 12897 flow [2024-06-21 17:58:21,062 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} [2024-06-21 17:58:21,062 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 470 predicate places. [2024-06-21 17:58:21,062 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 725 transitions, 12897 flow [2024-06-21 17:58:21,062 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) [2024-06-21 17:58:21,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:21,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:21,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-21 17:58:21,063 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)] === [2024-06-21 17:58:21,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:21,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1007444170, now seen corresponding path program 11 times [2024-06-21 17:58:21,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:21,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030480036] [2024-06-21 17:58:21,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:21,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:21,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:21,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:21,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:21,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030480036] [2024-06-21 17:58:21,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030480036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:21,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:21,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:21,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396427701] [2024-06-21 17:58:21,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:21,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:21,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:21,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:21,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:21,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:58:21,738 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) [2024-06-21 17:58:21,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:21,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:58:21,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:24,080 INFO L124 PetriNetUnfolderBase]: 5480/8524 cut-off events. [2024-06-21 17:58:24,081 INFO L125 PetriNetUnfolderBase]: For 887123/887131 co-relation queries the response was YES. [2024-06-21 17:58:24,215 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. [2024-06-21 17:58:24,254 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 665 selfloop transitions, 81 changer transitions 0/749 dead transitions. [2024-06-21 17:58:24,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 749 transitions, 14892 flow [2024-06-21 17:58:24,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:58:24,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:58:24,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-21 17:58:24,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.371875 [2024-06-21 17:58:24,255 INFO L175 Difference]: Start difference. First operand has 511 places, 725 transitions, 12897 flow. Second operand 8 states and 119 transitions. [2024-06-21 17:58:24,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 749 transitions, 14892 flow [2024-06-21 17:58:31,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 749 transitions, 14784 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-21 17:58:31,675 INFO L231 Difference]: Finished difference. Result has 515 places, 735 transitions, 13244 flow [2024-06-21 17:58:31,676 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} [2024-06-21 17:58:31,676 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 474 predicate places. [2024-06-21 17:58:31,676 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 735 transitions, 13244 flow [2024-06-21 17:58:31,676 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) [2024-06-21 17:58:31,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:31,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:31,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-21 17:58:31,677 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)] === [2024-06-21 17:58:31,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:31,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1007681320, now seen corresponding path program 12 times [2024-06-21 17:58:31,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:31,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355951698] [2024-06-21 17:58:31,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:31,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:31,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:32,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:32,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:32,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355951698] [2024-06-21 17:58:32,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355951698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:32,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:32,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:32,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377000565] [2024-06-21 17:58:32,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:32,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:32,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:32,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:32,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:32,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:58:32,336 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) [2024-06-21 17:58:32,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:32,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:58:32,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:35,253 INFO L124 PetriNetUnfolderBase]: 5477/8520 cut-off events. [2024-06-21 17:58:35,254 INFO L125 PetriNetUnfolderBase]: For 897817/897825 co-relation queries the response was YES. [2024-06-21 17:58:35,370 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. [2024-06-21 17:58:35,401 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 665 selfloop transitions, 82 changer transitions 0/750 dead transitions. [2024-06-21 17:58:35,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 750 transitions, 14790 flow [2024-06-21 17:58:35,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:58:35,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:58:35,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 140 transitions. [2024-06-21 17:58:35,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35 [2024-06-21 17:58:35,402 INFO L175 Difference]: Start difference. First operand has 515 places, 735 transitions, 13244 flow. Second operand 10 states and 140 transitions. [2024-06-21 17:58:35,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 750 transitions, 14790 flow [2024-06-21 17:58:42,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 750 transitions, 14516 flow, removed 92 selfloop flow, removed 4 redundant places. [2024-06-21 17:58:42,893 INFO L231 Difference]: Finished difference. Result has 521 places, 735 transitions, 13140 flow [2024-06-21 17:58:42,894 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} [2024-06-21 17:58:42,894 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 480 predicate places. [2024-06-21 17:58:42,894 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 735 transitions, 13140 flow [2024-06-21 17:58:42,894 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) [2024-06-21 17:58:42,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:42,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:42,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-21 17:58:42,894 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)] === [2024-06-21 17:58:42,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:42,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1007681134, now seen corresponding path program 8 times [2024-06-21 17:58:42,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:42,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916902491] [2024-06-21 17:58:42,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:42,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:42,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:43,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:43,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:43,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916902491] [2024-06-21 17:58:43,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916902491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:43,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:43,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:43,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915975064] [2024-06-21 17:58:43,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:43,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:43,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:43,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:43,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:43,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:58:43,490 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) [2024-06-21 17:58:43,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:43,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:58:43,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:46,267 INFO L124 PetriNetUnfolderBase]: 5487/8534 cut-off events. [2024-06-21 17:58:46,268 INFO L125 PetriNetUnfolderBase]: For 917622/917630 co-relation queries the response was YES. [2024-06-21 17:58:46,393 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. [2024-06-21 17:58:46,635 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 655 selfloop transitions, 98 changer transitions 0/756 dead transitions. [2024-06-21 17:58:46,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 756 transitions, 15004 flow [2024-06-21 17:58:46,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:58:46,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:58:46,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-21 17:58:46,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39375 [2024-06-21 17:58:46,636 INFO L175 Difference]: Start difference. First operand has 521 places, 735 transitions, 13140 flow. Second operand 8 states and 126 transitions. [2024-06-21 17:58:46,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 756 transitions, 15004 flow [2024-06-21 17:58:54,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 756 transitions, 14820 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 17:58:54,014 INFO L231 Difference]: Finished difference. Result has 521 places, 738 transitions, 13230 flow [2024-06-21 17:58:54,015 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} [2024-06-21 17:58:54,018 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 480 predicate places. [2024-06-21 17:58:54,018 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 738 transitions, 13230 flow [2024-06-21 17:58:54,018 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) [2024-06-21 17:58:54,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:54,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:54,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-21 17:58:54,019 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)] === [2024-06-21 17:58:54,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:54,032 INFO L85 PathProgramCache]: Analyzing trace with hash -153835604, now seen corresponding path program 9 times [2024-06-21 17:58:54,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:54,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419453004] [2024-06-21 17:58:54,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:54,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:54,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:54,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:54,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:54,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419453004] [2024-06-21 17:58:54,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419453004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:54,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:54,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:54,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634736742] [2024-06-21 17:58:54,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:54,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:54,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:54,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:54,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:54,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:58:54,778 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) [2024-06-21 17:58:54,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:54,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:58:54,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:57,560 INFO L124 PetriNetUnfolderBase]: 5523/8583 cut-off events. [2024-06-21 17:58:57,560 INFO L125 PetriNetUnfolderBase]: For 944524/944528 co-relation queries the response was YES. [2024-06-21 17:58:57,675 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. [2024-06-21 17:58:57,705 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 689 selfloop transitions, 79 changer transitions 0/771 dead transitions. [2024-06-21 17:58:57,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 771 transitions, 15284 flow [2024-06-21 17:58:57,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:58:57,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:58:57,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 17:58:57,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-21 17:58:57,706 INFO L175 Difference]: Start difference. First operand has 521 places, 738 transitions, 13230 flow. Second operand 7 states and 122 transitions. [2024-06-21 17:58:57,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 771 transitions, 15284 flow [2024-06-21 17:59:04,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 771 transitions, 15076 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-21 17:59:04,486 INFO L231 Difference]: Finished difference. Result has 525 places, 748 transitions, 13500 flow [2024-06-21 17:59:04,487 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} [2024-06-21 17:59:04,487 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 484 predicate places. [2024-06-21 17:59:04,487 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 748 transitions, 13500 flow [2024-06-21 17:59:04,487 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) [2024-06-21 17:59:04,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:04,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:04,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-21 17:59:04,488 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)] === [2024-06-21 17:59:04,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:04,488 INFO L85 PathProgramCache]: Analyzing trace with hash -559046834, now seen corresponding path program 10 times [2024-06-21 17:59:04,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:04,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061720812] [2024-06-21 17:59:04,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:04,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:04,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:05,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:05,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:05,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061720812] [2024-06-21 17:59:05,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061720812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:05,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:05,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:59:05,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096218149] [2024-06-21 17:59:05,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:05,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:59:05,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:05,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:59:05,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:59:05,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:59:05,145 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) [2024-06-21 17:59:05,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:05,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:59:05,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:08,050 INFO L124 PetriNetUnfolderBase]: 5533/8594 cut-off events. [2024-06-21 17:59:08,050 INFO L125 PetriNetUnfolderBase]: For 961503/961507 co-relation queries the response was YES. [2024-06-21 17:59:08,173 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. [2024-06-21 17:59:08,204 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 713 selfloop transitions, 50 changer transitions 0/766 dead transitions. [2024-06-21 17:59:08,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 766 transitions, 15173 flow [2024-06-21 17:59:08,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:59:08,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:59:08,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-21 17:59:08,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3892857142857143 [2024-06-21 17:59:08,206 INFO L175 Difference]: Start difference. First operand has 525 places, 748 transitions, 13500 flow. Second operand 7 states and 109 transitions. [2024-06-21 17:59:08,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 766 transitions, 15173 flow [2024-06-21 17:59:15,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 766 transitions, 15051 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-21 17:59:15,173 INFO L231 Difference]: Finished difference. Result has 529 places, 751 transitions, 13585 flow [2024-06-21 17:59:15,174 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} [2024-06-21 17:59:15,174 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 488 predicate places. [2024-06-21 17:59:15,174 INFO L495 AbstractCegarLoop]: Abstraction has has 529 places, 751 transitions, 13585 flow [2024-06-21 17:59:15,174 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) [2024-06-21 17:59:15,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:15,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:15,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-21 17:59:15,175 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)] === [2024-06-21 17:59:15,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:15,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1689194884, now seen corresponding path program 11 times [2024-06-21 17:59:15,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:15,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528163915] [2024-06-21 17:59:15,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:15,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:15,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:15,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:15,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:15,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528163915] [2024-06-21 17:59:15,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528163915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:15,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:15,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:59:15,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851846427] [2024-06-21 17:59:15,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:15,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:59:15,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:15,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:59:15,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:59:15,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:59:15,809 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) [2024-06-21 17:59:15,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:15,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:59:15,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:18,649 INFO L124 PetriNetUnfolderBase]: 5543/8619 cut-off events. [2024-06-21 17:59:18,649 INFO L125 PetriNetUnfolderBase]: For 983949/983949 co-relation queries the response was YES. [2024-06-21 17:59:18,784 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. [2024-06-21 17:59:18,817 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 733 selfloop transitions, 33 changer transitions 0/769 dead transitions. [2024-06-21 17:59:18,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 769 transitions, 15268 flow [2024-06-21 17:59:18,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:59:18,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:59:18,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-21 17:59:18,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-06-21 17:59:18,819 INFO L175 Difference]: Start difference. First operand has 529 places, 751 transitions, 13585 flow. Second operand 7 states and 108 transitions. [2024-06-21 17:59:18,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 769 transitions, 15268 flow [2024-06-21 17:59:25,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 769 transitions, 15105 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-21 17:59:25,906 INFO L231 Difference]: Finished difference. Result has 531 places, 754 transitions, 13585 flow [2024-06-21 17:59:25,907 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} [2024-06-21 17:59:25,907 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 490 predicate places. [2024-06-21 17:59:25,907 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 754 transitions, 13585 flow [2024-06-21 17:59:25,907 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) [2024-06-21 17:59:25,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:25,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:25,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-21 17:59:25,907 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)] === [2024-06-21 17:59:25,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:25,908 INFO L85 PathProgramCache]: Analyzing trace with hash -559284170, now seen corresponding path program 13 times [2024-06-21 17:59:25,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:25,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913815046] [2024-06-21 17:59:25,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:25,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:25,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:26,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:26,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:26,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913815046] [2024-06-21 17:59:26,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913815046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:26,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:26,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:59:26,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158159687] [2024-06-21 17:59:26,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:26,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:59:26,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:26,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:59:26,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:59:26,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:59:26,478 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) [2024-06-21 17:59:26,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:26,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:59:26,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:29,253 INFO L124 PetriNetUnfolderBase]: 5540/8604 cut-off events. [2024-06-21 17:59:29,254 INFO L125 PetriNetUnfolderBase]: For 983078/983082 co-relation queries the response was YES. [2024-06-21 17:59:29,377 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. [2024-06-21 17:59:29,415 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 714 selfloop transitions, 57 changer transitions 0/774 dead transitions. [2024-06-21 17:59:29,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 774 transitions, 15211 flow [2024-06-21 17:59:29,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:59:29,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:59:29,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-21 17:59:29,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-06-21 17:59:29,416 INFO L175 Difference]: Start difference. First operand has 531 places, 754 transitions, 13585 flow. Second operand 7 states and 114 transitions. [2024-06-21 17:59:29,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 774 transitions, 15211 flow [2024-06-21 17:59:37,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 774 transitions, 15017 flow, removed 79 selfloop flow, removed 3 redundant places. [2024-06-21 17:59:37,752 INFO L231 Difference]: Finished difference. Result has 535 places, 754 transitions, 13527 flow [2024-06-21 17:59:37,752 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} [2024-06-21 17:59:37,753 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 494 predicate places. [2024-06-21 17:59:37,753 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 754 transitions, 13527 flow [2024-06-21 17:59:37,753 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) [2024-06-21 17:59:37,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:37,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:37,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-21 17:59:37,753 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)] === [2024-06-21 17:59:37,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:37,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1688778988, now seen corresponding path program 14 times [2024-06-21 17:59:37,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:37,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838074693] [2024-06-21 17:59:37,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:37,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:37,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:38,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:38,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:38,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838074693] [2024-06-21 17:59:38,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838074693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:38,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:38,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:59:38,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268382560] [2024-06-21 17:59:38,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:38,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:59:38,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:38,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:59:38,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:59:38,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:59:38,318 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) [2024-06-21 17:59:38,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:38,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:59:38,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:40,991 INFO L124 PetriNetUnfolderBase]: 5537/8604 cut-off events. [2024-06-21 17:59:40,992 INFO L125 PetriNetUnfolderBase]: For 978752/978760 co-relation queries the response was YES. [2024-06-21 17:59:41,121 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. [2024-06-21 17:59:41,154 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 693 selfloop transitions, 77 changer transitions 0/773 dead transitions. [2024-06-21 17:59:41,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 773 transitions, 15359 flow [2024-06-21 17:59:41,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:59:41,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:59:41,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 17:59:41,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-21 17:59:41,155 INFO L175 Difference]: Start difference. First operand has 535 places, 754 transitions, 13527 flow. Second operand 7 states and 116 transitions. [2024-06-21 17:59:41,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 773 transitions, 15359 flow [2024-06-21 17:59:47,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 773 transitions, 15145 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-21 17:59:47,978 INFO L231 Difference]: Finished difference. Result has 535 places, 754 transitions, 13479 flow [2024-06-21 17:59:47,978 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} [2024-06-21 17:59:47,978 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 494 predicate places. [2024-06-21 17:59:47,978 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 754 transitions, 13479 flow [2024-06-21 17:59:47,979 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) [2024-06-21 17:59:47,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:47,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:47,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-21 17:59:47,979 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)] === [2024-06-21 17:59:47,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:47,979 INFO L85 PathProgramCache]: Analyzing trace with hash -559283984, now seen corresponding path program 12 times [2024-06-21 17:59:47,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:47,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191833500] [2024-06-21 17:59:47,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:47,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:47,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:48,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:48,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:48,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191833500] [2024-06-21 17:59:48,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191833500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:48,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:48,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:59:48,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085285742] [2024-06-21 17:59:48,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:48,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:59:48,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:48,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:59:48,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:59:48,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:59:48,659 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) [2024-06-21 17:59:48,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:48,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:59:48,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:51,403 INFO L124 PetriNetUnfolderBase]: 5531/8592 cut-off events. [2024-06-21 17:59:51,403 INFO L125 PetriNetUnfolderBase]: For 970189/970193 co-relation queries the response was YES. [2024-06-21 17:59:51,521 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. [2024-06-21 17:59:51,552 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 691 selfloop transitions, 80 changer transitions 0/774 dead transitions. [2024-06-21 17:59:51,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 774 transitions, 15319 flow [2024-06-21 17:59:51,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:59:51,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:59:51,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 17:59:51,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-21 17:59:51,553 INFO L175 Difference]: Start difference. First operand has 535 places, 754 transitions, 13479 flow. Second operand 7 states and 116 transitions. [2024-06-21 17:59:51,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 774 transitions, 15319 flow [2024-06-21 17:59:58,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 774 transitions, 15175 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 17:59:58,905 INFO L231 Difference]: Finished difference. Result has 536 places, 754 transitions, 13516 flow [2024-06-21 17:59:58,905 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} [2024-06-21 17:59:58,905 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 495 predicate places. [2024-06-21 17:59:58,905 INFO L495 AbstractCegarLoop]: Abstraction has has 536 places, 754 transitions, 13516 flow [2024-06-21 17:59:58,905 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) [2024-06-21 17:59:58,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:58,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:58,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-21 17:59:58,906 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)] === [2024-06-21 17:59:58,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:58,906 INFO L85 PathProgramCache]: Analyzing trace with hash -382152464, now seen corresponding path program 13 times [2024-06-21 17:59:58,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:58,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575589272] [2024-06-21 17:59:58,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:58,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:58,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:59,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:59,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:59,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575589272] [2024-06-21 17:59:59,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575589272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:59,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:59,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:59:59,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417306394] [2024-06-21 17:59:59,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:59,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:59:59,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:59,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:59:59,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:59:59,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:59:59,520 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) [2024-06-21 17:59:59,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:59,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:59:59,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:02,187 INFO L124 PetriNetUnfolderBase]: 5525/8588 cut-off events. [2024-06-21 18:00:02,187 INFO L125 PetriNetUnfolderBase]: For 961855/961863 co-relation queries the response was YES. [2024-06-21 18:00:02,310 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. [2024-06-21 18:00:02,504 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 655 selfloop transitions, 115 changer transitions 0/773 dead transitions. [2024-06-21 18:00:02,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 773 transitions, 15356 flow [2024-06-21 18:00:02,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:00:02,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:00:02,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 18:00:02,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-21 18:00:02,505 INFO L175 Difference]: Start difference. First operand has 536 places, 754 transitions, 13516 flow. Second operand 7 states and 116 transitions. [2024-06-21 18:00:02,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 773 transitions, 15356 flow [2024-06-21 18:00:10,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 773 transitions, 15088 flow, removed 59 selfloop flow, removed 6 redundant places. [2024-06-21 18:00:10,949 INFO L231 Difference]: Finished difference. Result has 537 places, 754 transitions, 13494 flow [2024-06-21 18:00:10,950 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} [2024-06-21 18:00:10,950 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 496 predicate places. [2024-06-21 18:00:10,951 INFO L495 AbstractCegarLoop]: Abstraction has has 537 places, 754 transitions, 13494 flow [2024-06-21 18:00:10,951 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) [2024-06-21 18:00:10,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:10,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:10,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-21 18:00:10,951 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)] === [2024-06-21 18:00:10,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:10,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1695243604, now seen corresponding path program 14 times [2024-06-21 18:00:10,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:10,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75621073] [2024-06-21 18:00:10,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:10,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:10,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:11,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:11,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:11,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75621073] [2024-06-21 18:00:11,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75621073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:11,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:11,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:00:11,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816917149] [2024-06-21 18:00:11,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:11,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:00:11,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:11,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:00:11,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:00:11,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 18:00:11,506 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) [2024-06-21 18:00:11,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:11,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 18:00:11,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:14,481 INFO L124 PetriNetUnfolderBase]: 5519/8576 cut-off events. [2024-06-21 18:00:14,481 INFO L125 PetriNetUnfolderBase]: For 946133/946137 co-relation queries the response was YES. [2024-06-21 18:00:14,634 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. [2024-06-21 18:00:14,673 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 714 selfloop transitions, 54 changer transitions 0/771 dead transitions. [2024-06-21 18:00:14,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 771 transitions, 15104 flow [2024-06-21 18:00:14,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:00:14,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:00:14,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-21 18:00:14,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42916666666666664 [2024-06-21 18:00:14,675 INFO L175 Difference]: Start difference. First operand has 537 places, 754 transitions, 13494 flow. Second operand 6 states and 103 transitions. [2024-06-21 18:00:14,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 771 transitions, 15104 flow [2024-06-21 18:00:23,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 771 transitions, 14798 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-21 18:00:23,153 INFO L231 Difference]: Finished difference. Result has 536 places, 754 transitions, 13328 flow [2024-06-21 18:00:23,154 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} [2024-06-21 18:00:23,154 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 495 predicate places. [2024-06-21 18:00:23,154 INFO L495 AbstractCegarLoop]: Abstraction has has 536 places, 754 transitions, 13328 flow [2024-06-21 18:00:23,155 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) [2024-06-21 18:00:23,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:23,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:23,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-21 18:00:23,155 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)] === [2024-06-21 18:00:23,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:23,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1689016138, now seen corresponding path program 15 times [2024-06-21 18:00:23,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:23,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218648914] [2024-06-21 18:00:23,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:23,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:23,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:23,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:23,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:23,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218648914] [2024-06-21 18:00:23,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218648914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:23,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:23,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:00:23,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109893763] [2024-06-21 18:00:23,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:23,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:00:23,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:23,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:00:23,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:00:23,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 18:00:23,816 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) [2024-06-21 18:00:23,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:23,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 18:00:23,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:26,797 INFO L124 PetriNetUnfolderBase]: 5516/8576 cut-off events. [2024-06-21 18:00:26,797 INFO L125 PetriNetUnfolderBase]: For 920856/920864 co-relation queries the response was YES. [2024-06-21 18:00:26,912 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. [2024-06-21 18:00:26,944 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 687 selfloop transitions, 82 changer transitions 0/772 dead transitions. [2024-06-21 18:00:26,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 772 transitions, 14944 flow [2024-06-21 18:00:26,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:00:26,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:00:26,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-21 18:00:26,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-06-21 18:00:26,945 INFO L175 Difference]: Start difference. First operand has 536 places, 754 transitions, 13328 flow. Second operand 7 states and 114 transitions. [2024-06-21 18:00:26,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 772 transitions, 14944 flow [2024-06-21 18:00:33,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 772 transitions, 14702 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-21 18:00:33,210 INFO L231 Difference]: Finished difference. Result has 537 places, 754 transitions, 13260 flow [2024-06-21 18:00:33,210 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} [2024-06-21 18:00:33,210 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 496 predicate places. [2024-06-21 18:00:33,211 INFO L495 AbstractCegarLoop]: Abstraction has has 537 places, 754 transitions, 13260 flow [2024-06-21 18:00:33,211 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) [2024-06-21 18:00:33,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:33,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:33,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-21 18:00:33,211 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)] === [2024-06-21 18:00:33,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:33,211 INFO L85 PathProgramCache]: Analyzing trace with hash -559037906, now seen corresponding path program 2 times [2024-06-21 18:00:33,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:33,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883500416] [2024-06-21 18:00:33,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:33,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:33,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:34,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:34,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:34,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883500416] [2024-06-21 18:00:34,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883500416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:34,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:34,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:00:34,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488889071] [2024-06-21 18:00:34,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:34,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:00:34,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:34,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:00:34,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:00:34,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 18:00:34,249 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) [2024-06-21 18:00:34,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:34,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 18:00:34,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:37,898 INFO L124 PetriNetUnfolderBase]: 5524/8584 cut-off events. [2024-06-21 18:00:37,898 INFO L125 PetriNetUnfolderBase]: For 907999/908003 co-relation queries the response was YES. [2024-06-21 18:00:38,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74110 conditions, 8584 events. 5524/8584 cut-off events. For 907999/908003 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 53212 event pairs, 1548 based on Foata normal form. 6/8589 useless extension candidates. Maximal degree in co-relation 73874. Up to 8456 conditions per place. [2024-06-21 18:00:38,065 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 712 selfloop transitions, 56 changer transitions 0/771 dead transitions. [2024-06-21 18:00:38,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 771 transitions, 14902 flow [2024-06-21 18:00:38,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:00:38,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:00:38,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-21 18:00:38,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3964285714285714 [2024-06-21 18:00:38,066 INFO L175 Difference]: Start difference. First operand has 537 places, 754 transitions, 13260 flow. Second operand 7 states and 111 transitions. [2024-06-21 18:00:38,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 771 transitions, 14902 flow [2024-06-21 18:00:46,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 771 transitions, 14698 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 18:00:46,119 INFO L231 Difference]: Finished difference. Result has 537 places, 756 transitions, 13234 flow [2024-06-21 18:00:46,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13056, 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=698, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13234, PETRI_PLACES=537, PETRI_TRANSITIONS=756} [2024-06-21 18:00:46,119 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 496 predicate places. [2024-06-21 18:00:46,120 INFO L495 AbstractCegarLoop]: Abstraction has has 537 places, 756 transitions, 13234 flow [2024-06-21 18:00:46,120 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) [2024-06-21 18:00:46,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:46,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:46,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-21 18:00:46,120 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:46,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:46,121 INFO L85 PathProgramCache]: Analyzing trace with hash -145255796, now seen corresponding path program 3 times [2024-06-21 18:00:46,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:46,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019006164] [2024-06-21 18:00:46,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:46,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:46,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:47,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:47,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:47,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019006164] [2024-06-21 18:00:47,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019006164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:47,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:47,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:00:47,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357916125] [2024-06-21 18:00:47,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:47,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:00:47,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:47,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:00:47,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:00:47,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 18:00:47,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 537 places, 756 transitions, 13234 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) [2024-06-21 18:00:47,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:47,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 18:00:47,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:50,468 INFO L124 PetriNetUnfolderBase]: 5532/8596 cut-off events. [2024-06-21 18:00:50,468 INFO L125 PetriNetUnfolderBase]: For 909755/909759 co-relation queries the response was YES. [2024-06-21 18:00:50,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74265 conditions, 8596 events. 5532/8596 cut-off events. For 909755/909759 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 53273 event pairs, 1550 based on Foata normal form. 6/8601 useless extension candidates. Maximal degree in co-relation 74029. Up to 8483 conditions per place. [2024-06-21 18:00:50,645 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 732 selfloop transitions, 42 changer transitions 0/777 dead transitions. [2024-06-21 18:00:50,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 777 transitions, 15160 flow [2024-06-21 18:00:50,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:00:50,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:00:50,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-21 18:00:50,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 18:00:50,646 INFO L175 Difference]: Start difference. First operand has 537 places, 756 transitions, 13234 flow. Second operand 7 states and 112 transitions. [2024-06-21 18:00:50,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 777 transitions, 15160 flow [2024-06-21 18:00:57,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 538 places, 777 transitions, 15014 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 18:00:57,361 INFO L231 Difference]: Finished difference. Result has 539 places, 760 transitions, 13293 flow [2024-06-21 18:00:57,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13088, PETRI_DIFFERENCE_MINUEND_PLACES=532, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=756, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=716, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13293, PETRI_PLACES=539, PETRI_TRANSITIONS=760} [2024-06-21 18:00:57,362 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 498 predicate places. [2024-06-21 18:00:57,362 INFO L495 AbstractCegarLoop]: Abstraction has has 539 places, 760 transitions, 13293 flow [2024-06-21 18:00:57,362 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) [2024-06-21 18:00:57,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:57,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:57,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-21 18:00:57,363 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:57,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:57,363 INFO L85 PathProgramCache]: Analyzing trace with hash -145731026, now seen corresponding path program 4 times [2024-06-21 18:00:57,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:57,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407129312] [2024-06-21 18:00:57,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:57,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:57,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:58,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:58,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:58,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407129312] [2024-06-21 18:00:58,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407129312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:58,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:58,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:00:58,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596841000] [2024-06-21 18:00:58,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:58,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:00:58,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:58,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:00:58,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:00:58,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 18:00:58,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 760 transitions, 13293 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) [2024-06-21 18:00:58,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:58,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 18:00:58,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:01:01,414 INFO L124 PetriNetUnfolderBase]: 5527/8589 cut-off events. [2024-06-21 18:01:01,414 INFO L125 PetriNetUnfolderBase]: For 914700/914704 co-relation queries the response was YES. [2024-06-21 18:01:01,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74141 conditions, 8589 events. 5527/8589 cut-off events. For 914700/914704 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 53256 event pairs, 1549 based on Foata normal form. 6/8594 useless extension candidates. Maximal degree in co-relation 73904. Up to 8493 conditions per place. [2024-06-21 18:01:01,605 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 733 selfloop transitions, 38 changer transitions 0/774 dead transitions. [2024-06-21 18:01:01,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 774 transitions, 14887 flow [2024-06-21 18:01:01,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:01:01,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:01:01,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-21 18:01:01,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-21 18:01:01,606 INFO L175 Difference]: Start difference. First operand has 539 places, 760 transitions, 13293 flow. Second operand 6 states and 99 transitions. [2024-06-21 18:01:01,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 774 transitions, 14887 flow