./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix002.oepc.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/mix002.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix002.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/mix002.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 19:45:24,220 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 19:45:24,303 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 19:45:24,306 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 19:45:24,306 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 19:45:24,318 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 19:45:24,318 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 19:45:24,319 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 19:45:24,319 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 19:45:24,319 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 19:45:24,319 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 19:45:24,320 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 19:45:24,320 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 19:45:24,320 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 19:45:24,321 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 19:45:24,321 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 19:45:24,321 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 19:45:24,321 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 19:45:24,322 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 19:45:24,322 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 19:45:24,322 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 19:45:24,323 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 19:45:24,323 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 19:45:24,323 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 19:45:24,323 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 19:45:24,324 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 19:45:24,324 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 19:45:24,324 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 19:45:24,324 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 19:45:24,325 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 19:45:24,325 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 19:45:24,325 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 19:45:24,325 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:45:24,326 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 19:45:24,326 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 19:45:24,326 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 19:45:24,326 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 19:45:24,327 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 19:45:24,327 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 19:45:24,327 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 19:45:24,327 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 19:45:24,327 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 19:45:24,328 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 19:45:24,328 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 19:45:24,475 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 19:45:24,492 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 19:45:24,494 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 19:45:24,495 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 19:45:24,496 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 19:45:24,497 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix002.oepc.i [2024-06-27 19:45:25,508 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 19:45:25,742 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 19:45:25,744 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix002.oepc.i [2024-06-27 19:45:25,755 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e69e5e9fa/8951a94548f045b49dc11bce9c20354e/FLAGac7cb3073 [2024-06-27 19:45:25,764 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e69e5e9fa/8951a94548f045b49dc11bce9c20354e [2024-06-27 19:45:25,766 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 19:45:25,767 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 19:45:25,767 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix002.oepc.yml/witness.yml [2024-06-27 19:45:25,959 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 19:45:25,960 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 19:45:25,962 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 19:45:25,963 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 19:45:25,966 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 19:45:25,967 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:45:25" (1/2) ... [2024-06-27 19:45:25,968 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42e6058e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:45:25, skipping insertion in model container [2024-06-27 19:45:25,968 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:45:25" (1/2) ... [2024-06-27 19:45:25,969 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@527247b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:45:25, skipping insertion in model container [2024-06-27 19:45:25,969 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:45:25" (2/2) ... [2024-06-27 19:45:25,970 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42e6058e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:45:25, skipping insertion in model container [2024-06-27 19:45:25,970 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:45:25" (2/2) ... [2024-06-27 19:45:25,970 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 19:45:26,042 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 19:45:26,043 INFO L97 edCorrectnessWitness]: Location invariant before [L861-L861] ((((((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) [2024-06-27 19:45:26,043 INFO L97 edCorrectnessWitness]: Location invariant before [L860-L860] ((((((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) [2024-06-27 19:45:26,044 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] ((((((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) [2024-06-27 19:45:26,044 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 19:45:26,044 INFO L106 edCorrectnessWitness]: ghost_update [L856-L856] multithreaded = 1; [2024-06-27 19:45:26,079 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 19:45:26,329 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:45:26,348 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 19:45:26,490 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:45:26,522 INFO L206 MainTranslator]: Completed translation [2024-06-27 19:45:26,522 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:45:26 WrapperNode [2024-06-27 19:45:26,523 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 19:45:26,524 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 19:45:26,524 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 19:45:26,524 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 19:45:26,529 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:45:26" (1/1) ... [2024-06-27 19:45:26,543 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:45:26" (1/1) ... [2024-06-27 19:45:26,569 INFO L138 Inliner]: procedures = 175, calls = 51, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 136 [2024-06-27 19:45:26,572 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 19:45:26,576 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 19:45:26,576 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 19:45:26,577 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 19:45:26,591 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:45:26" (1/1) ... [2024-06-27 19:45:26,591 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:45:26" (1/1) ... [2024-06-27 19:45:26,594 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:45:26" (1/1) ... [2024-06-27 19:45:26,606 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 19:45:26,606 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:45:26" (1/1) ... [2024-06-27 19:45:26,606 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:45:26" (1/1) ... [2024-06-27 19:45:26,613 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:45:26" (1/1) ... [2024-06-27 19:45:26,614 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:45:26" (1/1) ... [2024-06-27 19:45:26,616 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:45:26" (1/1) ... [2024-06-27 19:45:26,617 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:45:26" (1/1) ... [2024-06-27 19:45:26,620 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 19:45:26,620 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 19:45:26,620 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 19:45:26,621 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 19:45:26,621 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:45:26" (1/1) ... [2024-06-27 19:45:26,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:45:26,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 19:45:26,660 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 19:45:26,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 19:45:26,697 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 19:45:26,697 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 19:45:26,698 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 19:45:26,698 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 19:45:26,698 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 19:45:26,698 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 19:45:26,698 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 19:45:26,699 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 19:45:26,699 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 19:45:26,699 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 19:45:26,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 19:45:26,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 19:45:26,701 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 19:45:26,792 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 19:45:26,793 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 19:45:27,159 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 19:45:27,160 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 19:45:27,291 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 19:45:27,292 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 19:45:27,292 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:45:27 BoogieIcfgContainer [2024-06-27 19:45:27,293 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 19:45:27,295 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 19:45:27,295 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 19:45:27,313 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 19:45:27,313 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 07:45:25" (1/4) ... [2024-06-27 19:45:27,315 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f7222e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 07:45:27, skipping insertion in model container [2024-06-27 19:45:27,315 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:45:25" (2/4) ... [2024-06-27 19:45:27,315 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f7222e8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 07:45:27, skipping insertion in model container [2024-06-27 19:45:27,315 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:45:26" (3/4) ... [2024-06-27 19:45:27,315 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f7222e8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 07:45:27, skipping insertion in model container [2024-06-27 19:45:27,315 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:45:27" (4/4) ... [2024-06-27 19:45:27,316 INFO L112 eAbstractionObserver]: Analyzing ICFG mix002.oepc.i [2024-06-27 19:45:27,329 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 19:45:27,330 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 19:45:27,330 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 19:45:27,371 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 19:45:27,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 44 transitions, 100 flow [2024-06-27 19:45:27,419 INFO L124 PetriNetUnfolderBase]: 0/41 cut-off events. [2024-06-27 19:45:27,419 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:45:27,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 41 events. 0/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 78 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 19:45:27,421 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 44 transitions, 100 flow [2024-06-27 19:45:27,423 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 35 transitions, 79 flow [2024-06-27 19:45:27,429 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 19:45:27,434 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;@398750c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 19:45:27,434 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 19:45:27,436 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 19:45:27,437 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 19:45:27,437 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:45:27,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:27,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 19:45:27,438 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:45:27,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:27,441 INFO L85 PathProgramCache]: Analyzing trace with hash 385953887, now seen corresponding path program 1 times [2024-06-27 19:45:27,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:27,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508101832] [2024-06-27 19:45:27,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:27,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:27,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:28,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:28,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:28,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508101832] [2024-06-27 19:45:28,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508101832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:28,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:28,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 19:45:28,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722270132] [2024-06-27 19:45:28,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:28,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 19:45:28,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:28,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 19:45:28,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 19:45:28,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 44 [2024-06-27 19:45:28,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 35 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:28,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:28,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 44 [2024-06-27 19:45:28,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:28,854 INFO L124 PetriNetUnfolderBase]: 1363/2141 cut-off events. [2024-06-27 19:45:28,855 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-06-27 19:45:28,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4265 conditions, 2141 events. 1363/2141 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11056 event pairs, 964 based on Foata normal form. 1/2084 useless extension candidates. Maximal degree in co-relation 4253. Up to 2037 conditions per place. [2024-06-27 19:45:28,871 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 32 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-27 19:45:28,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 177 flow [2024-06-27 19:45:28,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 19:45:28,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 19:45:28,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2024-06-27 19:45:28,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-06-27 19:45:28,881 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 79 flow. Second operand 3 states and 84 transitions. [2024-06-27 19:45:28,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 177 flow [2024-06-27 19:45:28,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 172 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 19:45:28,888 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 106 flow [2024-06-27 19:45:28,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-27 19:45:28,893 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2024-06-27 19:45:28,894 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 106 flow [2024-06-27 19:45:28,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:28,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:28,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:28,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 19:45:28,895 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:45:28,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:28,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1534536062, now seen corresponding path program 1 times [2024-06-27 19:45:28,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:28,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045912114] [2024-06-27 19:45:28,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:28,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:28,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:29,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:29,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:29,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045912114] [2024-06-27 19:45:29,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045912114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:29,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:29,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 19:45:29,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049175365] [2024-06-27 19:45:29,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:29,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:45:29,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:29,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:45:29,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:45:29,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 44 [2024-06-27 19:45:29,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:29,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:29,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 44 [2024-06-27 19:45:29,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:29,834 INFO L124 PetriNetUnfolderBase]: 1357/2132 cut-off events. [2024-06-27 19:45:29,834 INFO L125 PetriNetUnfolderBase]: For 420/420 co-relation queries the response was YES. [2024-06-27 19:45:29,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4799 conditions, 2132 events. 1357/2132 cut-off events. For 420/420 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11006 event pairs, 840 based on Foata normal form. 3/2111 useless extension candidates. Maximal degree in co-relation 4787. Up to 2013 conditions per place. [2024-06-27 19:45:29,844 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 39 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-27 19:45:29,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 55 transitions, 244 flow [2024-06-27 19:45:29,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:45:29,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:45:29,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 109 transitions. [2024-06-27 19:45:29,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6193181818181818 [2024-06-27 19:45:29,847 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 106 flow. Second operand 4 states and 109 transitions. [2024-06-27 19:45:29,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 55 transitions, 244 flow [2024-06-27 19:45:29,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 55 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 19:45:29,850 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 142 flow [2024-06-27 19:45:29,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-27 19:45:29,850 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2024-06-27 19:45:29,851 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 142 flow [2024-06-27 19:45:29,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:29,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:29,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:29,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 19:45:29,854 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:45:29,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:29,856 INFO L85 PathProgramCache]: Analyzing trace with hash 325978918, now seen corresponding path program 1 times [2024-06-27 19:45:29,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:29,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346784354] [2024-06-27 19:45:29,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:29,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:29,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:30,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:30,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:30,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346784354] [2024-06-27 19:45:30,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346784354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:30,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:30,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:45:30,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097650211] [2024-06-27 19:45:30,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:30,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:45:30,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:30,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:45:30,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:45:30,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-06-27 19:45:30,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:30,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:30,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-06-27 19:45:30,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:30,970 INFO L124 PetriNetUnfolderBase]: 1598/2508 cut-off events. [2024-06-27 19:45:30,970 INFO L125 PetriNetUnfolderBase]: For 1348/1348 co-relation queries the response was YES. [2024-06-27 19:45:30,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6220 conditions, 2508 events. 1598/2508 cut-off events. For 1348/1348 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12994 event pairs, 915 based on Foata normal form. 3/2493 useless extension candidates. Maximal degree in co-relation 6206. Up to 2350 conditions per place. [2024-06-27 19:45:30,981 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 47 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2024-06-27 19:45:30,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 65 transitions, 324 flow [2024-06-27 19:45:30,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:45:30,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:45:30,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-27 19:45:30,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-27 19:45:30,986 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 142 flow. Second operand 5 states and 130 transitions. [2024-06-27 19:45:30,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 65 transitions, 324 flow [2024-06-27 19:45:30,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 65 transitions, 310 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 19:45:30,990 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 178 flow [2024-06-27 19:45:30,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=178, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-06-27 19:45:30,991 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 6 predicate places. [2024-06-27 19:45:30,991 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 178 flow [2024-06-27 19:45:30,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:30,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:30,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:30,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 19:45:30,992 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:45:30,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:30,993 INFO L85 PathProgramCache]: Analyzing trace with hash 2097231379, now seen corresponding path program 1 times [2024-06-27 19:45:30,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:30,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851796725] [2024-06-27 19:45:30,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:30,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:31,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:31,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:31,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:31,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851796725] [2024-06-27 19:45:31,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851796725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:31,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:31,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:45:31,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234388914] [2024-06-27 19:45:31,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:31,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:45:31,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:31,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:45:31,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:45:31,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-06-27 19:45:31,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 178 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:31,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:31,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-06-27 19:45:31,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:32,106 INFO L124 PetriNetUnfolderBase]: 1592/2521 cut-off events. [2024-06-27 19:45:32,107 INFO L125 PetriNetUnfolderBase]: For 2509/2509 co-relation queries the response was YES. [2024-06-27 19:45:32,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6813 conditions, 2521 events. 1592/2521 cut-off events. For 2509/2509 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13176 event pairs, 791 based on Foata normal form. 3/2498 useless extension candidates. Maximal degree in co-relation 6798. Up to 2326 conditions per place. [2024-06-27 19:45:32,120 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 54 selfloop transitions, 13 changer transitions 0/75 dead transitions. [2024-06-27 19:45:32,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 75 transitions, 402 flow [2024-06-27 19:45:32,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:45:32,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:45:32,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-27 19:45:32,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-27 19:45:32,122 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 178 flow. Second operand 6 states and 154 transitions. [2024-06-27 19:45:32,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 75 transitions, 402 flow [2024-06-27 19:45:32,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 75 transitions, 378 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 19:45:32,124 INFO L231 Difference]: Finished difference. Result has 54 places, 47 transitions, 214 flow [2024-06-27 19:45:32,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=214, PETRI_PLACES=54, PETRI_TRANSITIONS=47} [2024-06-27 19:45:32,125 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 9 predicate places. [2024-06-27 19:45:32,125 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 214 flow [2024-06-27 19:45:32,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:32,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:32,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:32,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 19:45:32,126 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:45:32,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:32,126 INFO L85 PathProgramCache]: Analyzing trace with hash -988304806, now seen corresponding path program 1 times [2024-06-27 19:45:32,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:32,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894464366] [2024-06-27 19:45:32,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:32,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:32,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:32,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:32,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:32,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894464366] [2024-06-27 19:45:32,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894464366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:32,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:32,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:45:32,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347228683] [2024-06-27 19:45:32,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:32,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:45:32,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:32,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:45:32,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:45:32,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 19:45:32,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 214 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:32,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:32,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 19:45:32,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:33,253 INFO L124 PetriNetUnfolderBase]: 2130/3329 cut-off events. [2024-06-27 19:45:33,253 INFO L125 PetriNetUnfolderBase]: For 5096/5096 co-relation queries the response was YES. [2024-06-27 19:45:33,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9592 conditions, 3329 events. 2130/3329 cut-off events. For 5096/5096 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 17244 event pairs, 1193 based on Foata normal form. 2/3328 useless extension candidates. Maximal degree in co-relation 9575. Up to 3145 conditions per place. [2024-06-27 19:45:33,270 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 46 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2024-06-27 19:45:33,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 61 transitions, 366 flow [2024-06-27 19:45:33,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:45:33,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:45:33,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 103 transitions. [2024-06-27 19:45:33,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681818181818182 [2024-06-27 19:45:33,271 INFO L175 Difference]: Start difference. First operand has 54 places, 47 transitions, 214 flow. Second operand 5 states and 103 transitions. [2024-06-27 19:45:33,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 61 transitions, 366 flow [2024-06-27 19:45:33,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 61 transitions, 332 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 19:45:33,274 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 226 flow [2024-06-27 19:45:33,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=226, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2024-06-27 19:45:33,275 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 10 predicate places. [2024-06-27 19:45:33,275 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 226 flow [2024-06-27 19:45:33,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:33,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:33,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:33,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 19:45:33,276 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:45:33,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:33,276 INFO L85 PathProgramCache]: Analyzing trace with hash 318164924, now seen corresponding path program 1 times [2024-06-27 19:45:33,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:33,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841646867] [2024-06-27 19:45:33,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:33,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:33,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:34,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:34,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:34,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841646867] [2024-06-27 19:45:34,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841646867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:34,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:34,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:45:34,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430810605] [2024-06-27 19:45:34,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:34,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:45:34,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:34,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:45:34,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:45:34,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-27 19:45:34,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 226 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:34,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:34,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-27 19:45:34,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:35,096 INFO L124 PetriNetUnfolderBase]: 2074/3265 cut-off events. [2024-06-27 19:45:35,097 INFO L125 PetriNetUnfolderBase]: For 7245/7245 co-relation queries the response was YES. [2024-06-27 19:45:35,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10065 conditions, 3265 events. 2074/3265 cut-off events. For 7245/7245 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 17191 event pairs, 843 based on Foata normal form. 3/3260 useless extension candidates. Maximal degree in co-relation 10047. Up to 2972 conditions per place. [2024-06-27 19:45:35,121 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 71 selfloop transitions, 19 changer transitions 0/98 dead transitions. [2024-06-27 19:45:35,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 98 transitions, 548 flow [2024-06-27 19:45:35,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:45:35,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:45:35,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-27 19:45:35,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5539772727272727 [2024-06-27 19:45:35,123 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 226 flow. Second operand 8 states and 195 transitions. [2024-06-27 19:45:35,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 98 transitions, 548 flow [2024-06-27 19:45:35,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 98 transitions, 526 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 19:45:35,129 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 298 flow [2024-06-27 19:45:35,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=298, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2024-06-27 19:45:35,131 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 16 predicate places. [2024-06-27 19:45:35,131 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 298 flow [2024-06-27 19:45:35,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:35,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:35,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:35,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 19:45:35,132 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:45:35,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:35,132 INFO L85 PathProgramCache]: Analyzing trace with hash -572676264, now seen corresponding path program 1 times [2024-06-27 19:45:35,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:35,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239815555] [2024-06-27 19:45:35,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:35,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:35,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:35,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:35,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:35,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239815555] [2024-06-27 19:45:35,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239815555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:35,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:35,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:45:35,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236231104] [2024-06-27 19:45:35,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:35,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:45:35,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:35,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:45:35,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:45:35,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 19:45:35,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 298 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:35,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:35,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 19:45:35,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:36,445 INFO L124 PetriNetUnfolderBase]: 2106/3305 cut-off events. [2024-06-27 19:45:36,445 INFO L125 PetriNetUnfolderBase]: For 10174/10174 co-relation queries the response was YES. [2024-06-27 19:45:36,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11060 conditions, 3305 events. 2106/3305 cut-off events. For 10174/10174 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 17196 event pairs, 886 based on Foata normal form. 4/3306 useless extension candidates. Maximal degree in co-relation 11040. Up to 3104 conditions per place. [2024-06-27 19:45:36,459 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 57 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2024-06-27 19:45:36,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 75 transitions, 496 flow [2024-06-27 19:45:36,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:45:36,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:45:36,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-27 19:45:36,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-27 19:45:36,461 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 298 flow. Second operand 6 states and 122 transitions. [2024-06-27 19:45:36,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 75 transitions, 496 flow [2024-06-27 19:45:36,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 75 transitions, 446 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 19:45:36,465 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 306 flow [2024-06-27 19:45:36,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=306, PETRI_PLACES=62, PETRI_TRANSITIONS=59} [2024-06-27 19:45:36,465 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 17 predicate places. [2024-06-27 19:45:36,465 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 306 flow [2024-06-27 19:45:36,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:36,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:36,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:36,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 19:45:36,466 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:45:36,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:36,466 INFO L85 PathProgramCache]: Analyzing trace with hash -580721799, now seen corresponding path program 1 times [2024-06-27 19:45:36,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:36,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184460407] [2024-06-27 19:45:36,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:36,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:36,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:37,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:37,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:37,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184460407] [2024-06-27 19:45:37,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184460407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:37,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:37,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:45:37,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341219437] [2024-06-27 19:45:37,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:37,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:45:37,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:37,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:45:37,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:45:37,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 19:45:37,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 59 transitions, 306 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:37,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:37,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 19:45:37,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:37,682 INFO L124 PetriNetUnfolderBase]: 2123/3361 cut-off events. [2024-06-27 19:45:37,683 INFO L125 PetriNetUnfolderBase]: For 12609/12615 co-relation queries the response was YES. [2024-06-27 19:45:37,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11835 conditions, 3361 events. 2123/3361 cut-off events. For 12609/12615 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 17616 event pairs, 887 based on Foata normal form. 6/3363 useless extension candidates. Maximal degree in co-relation 11813. Up to 3103 conditions per place. [2024-06-27 19:45:37,697 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 62 selfloop transitions, 16 changer transitions 0/85 dead transitions. [2024-06-27 19:45:37,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 85 transitions, 588 flow [2024-06-27 19:45:37,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:45:37,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:45:37,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-27 19:45:37,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48484848484848486 [2024-06-27 19:45:37,698 INFO L175 Difference]: Start difference. First operand has 62 places, 59 transitions, 306 flow. Second operand 6 states and 128 transitions. [2024-06-27 19:45:37,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 85 transitions, 588 flow [2024-06-27 19:45:37,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 85 transitions, 554 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 19:45:37,702 INFO L231 Difference]: Finished difference. Result has 64 places, 65 transitions, 366 flow [2024-06-27 19:45:37,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=366, PETRI_PLACES=64, PETRI_TRANSITIONS=65} [2024-06-27 19:45:37,704 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 19 predicate places. [2024-06-27 19:45:37,705 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 65 transitions, 366 flow [2024-06-27 19:45:37,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:37,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:37,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:37,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 19:45:37,705 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:45:37,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:37,706 INFO L85 PathProgramCache]: Analyzing trace with hash 687200211, now seen corresponding path program 2 times [2024-06-27 19:45:37,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:37,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777439213] [2024-06-27 19:45:37,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:37,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:37,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:38,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:38,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:38,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777439213] [2024-06-27 19:45:38,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777439213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:38,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:38,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:45:38,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655771125] [2024-06-27 19:45:38,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:38,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:45:38,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:38,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:45:38,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:45:38,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 19:45:38,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 65 transitions, 366 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:38,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:38,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 19:45:38,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:38,919 INFO L124 PetriNetUnfolderBase]: 2118/3353 cut-off events. [2024-06-27 19:45:38,919 INFO L125 PetriNetUnfolderBase]: For 15639/15639 co-relation queries the response was YES. [2024-06-27 19:45:38,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12494 conditions, 3353 events. 2118/3353 cut-off events. For 15639/15639 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 17607 event pairs, 883 based on Foata normal form. 2/3352 useless extension candidates. Maximal degree in co-relation 12471. Up to 3122 conditions per place. [2024-06-27 19:45:38,936 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 62 selfloop transitions, 11 changer transitions 0/80 dead transitions. [2024-06-27 19:45:38,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 80 transitions, 550 flow [2024-06-27 19:45:38,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:45:38,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:45:38,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-27 19:45:38,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-27 19:45:38,937 INFO L175 Difference]: Start difference. First operand has 64 places, 65 transitions, 366 flow. Second operand 6 states and 121 transitions. [2024-06-27 19:45:38,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 80 transitions, 550 flow [2024-06-27 19:45:38,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 80 transitions, 510 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-27 19:45:38,944 INFO L231 Difference]: Finished difference. Result has 68 places, 65 transitions, 356 flow [2024-06-27 19:45:38,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=356, PETRI_PLACES=68, PETRI_TRANSITIONS=65} [2024-06-27 19:45:38,945 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 23 predicate places. [2024-06-27 19:45:38,945 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 65 transitions, 356 flow [2024-06-27 19:45:38,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:38,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:38,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:38,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 19:45:38,946 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:45:38,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:38,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1273179428, now seen corresponding path program 1 times [2024-06-27 19:45:38,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:38,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394914655] [2024-06-27 19:45:38,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:38,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:38,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:40,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:40,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:40,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394914655] [2024-06-27 19:45:40,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394914655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:40,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:40,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:45:40,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231995674] [2024-06-27 19:45:40,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:40,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:45:40,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:40,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:45:40,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:45:40,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-27 19:45:40,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 65 transitions, 356 flow. Second operand has 9 states, 9 states have (on average 14.11111111111111) internal successors, (127), 9 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:40,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:40,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-27 19:45:40,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:40,854 INFO L124 PetriNetUnfolderBase]: 2070/3275 cut-off events. [2024-06-27 19:45:40,854 INFO L125 PetriNetUnfolderBase]: For 18726/18726 co-relation queries the response was YES. [2024-06-27 19:45:40,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12523 conditions, 3275 events. 2070/3275 cut-off events. For 18726/18726 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 17316 event pairs, 662 based on Foata normal form. 6/3263 useless extension candidates. Maximal degree in co-relation 12499. Up to 2927 conditions per place. [2024-06-27 19:45:40,870 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 82 selfloop transitions, 21 changer transitions 0/113 dead transitions. [2024-06-27 19:45:40,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 113 transitions, 700 flow [2024-06-27 19:45:40,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:45:40,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:45:40,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-27 19:45:40,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5404040404040404 [2024-06-27 19:45:40,872 INFO L175 Difference]: Start difference. First operand has 68 places, 65 transitions, 356 flow. Second operand 9 states and 214 transitions. [2024-06-27 19:45:40,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 113 transitions, 700 flow [2024-06-27 19:45:40,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 113 transitions, 670 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 19:45:40,882 INFO L231 Difference]: Finished difference. Result has 71 places, 66 transitions, 397 flow [2024-06-27 19:45:40,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=397, PETRI_PLACES=71, PETRI_TRANSITIONS=66} [2024-06-27 19:45:40,883 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 26 predicate places. [2024-06-27 19:45:40,883 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 66 transitions, 397 flow [2024-06-27 19:45:40,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.11111111111111) internal successors, (127), 9 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:40,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:40,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:40,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 19:45:40,884 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:45:40,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:40,885 INFO L85 PathProgramCache]: Analyzing trace with hash -822684673, now seen corresponding path program 1 times [2024-06-27 19:45:40,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:40,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889053136] [2024-06-27 19:45:40,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:40,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:40,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:41,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:41,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:41,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889053136] [2024-06-27 19:45:41,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889053136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:41,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:41,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:45:41,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068204496] [2024-06-27 19:45:41,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:41,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:45:41,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:41,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:45:41,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:45:41,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:45:41,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 66 transitions, 397 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:41,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:41,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:45:41,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:42,291 INFO L124 PetriNetUnfolderBase]: 2222/3432 cut-off events. [2024-06-27 19:45:42,291 INFO L125 PetriNetUnfolderBase]: For 22439/22445 co-relation queries the response was YES. [2024-06-27 19:45:42,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13698 conditions, 3432 events. 2222/3432 cut-off events. For 22439/22445 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 17488 event pairs, 830 based on Foata normal form. 6/3434 useless extension candidates. Maximal degree in co-relation 13673. Up to 3199 conditions per place. [2024-06-27 19:45:42,307 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 70 selfloop transitions, 24 changer transitions 0/99 dead transitions. [2024-06-27 19:45:42,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 99 transitions, 753 flow [2024-06-27 19:45:42,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:45:42,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:45:42,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-27 19:45:42,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-27 19:45:42,309 INFO L175 Difference]: Start difference. First operand has 71 places, 66 transitions, 397 flow. Second operand 7 states and 143 transitions. [2024-06-27 19:45:42,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 99 transitions, 753 flow [2024-06-27 19:45:42,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 99 transitions, 688 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-27 19:45:42,319 INFO L231 Difference]: Finished difference. Result has 71 places, 72 transitions, 454 flow [2024-06-27 19:45:42,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=454, PETRI_PLACES=71, PETRI_TRANSITIONS=72} [2024-06-27 19:45:42,320 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 26 predicate places. [2024-06-27 19:45:42,320 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 72 transitions, 454 flow [2024-06-27 19:45:42,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:42,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:42,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:42,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 19:45:42,321 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:45:42,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:42,321 INFO L85 PathProgramCache]: Analyzing trace with hash -822504935, now seen corresponding path program 1 times [2024-06-27 19:45:42,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:42,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655687780] [2024-06-27 19:45:42,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:42,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:42,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:43,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:43,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:43,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655687780] [2024-06-27 19:45:43,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655687780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:43,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:43,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:45:43,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801638952] [2024-06-27 19:45:43,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:43,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:45:43,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:43,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:45:43,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:45:43,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 19:45:43,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 72 transitions, 454 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:43,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:43,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 19:45:43,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:43,658 INFO L124 PetriNetUnfolderBase]: 2164/3388 cut-off events. [2024-06-27 19:45:43,659 INFO L125 PetriNetUnfolderBase]: For 27272/27278 co-relation queries the response was YES. [2024-06-27 19:45:43,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14152 conditions, 3388 events. 2164/3388 cut-off events. For 27272/27278 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 17606 event pairs, 785 based on Foata normal form. 5/3388 useless extension candidates. Maximal degree in co-relation 14125. Up to 3093 conditions per place. [2024-06-27 19:45:43,676 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 75 selfloop transitions, 23 changer transitions 0/107 dead transitions. [2024-06-27 19:45:43,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 107 transitions, 832 flow [2024-06-27 19:45:43,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:45:43,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:45:43,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-06-27 19:45:43,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4837662337662338 [2024-06-27 19:45:43,677 INFO L175 Difference]: Start difference. First operand has 71 places, 72 transitions, 454 flow. Second operand 7 states and 149 transitions. [2024-06-27 19:45:43,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 107 transitions, 832 flow [2024-06-27 19:45:43,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 107 transitions, 786 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-27 19:45:43,691 INFO L231 Difference]: Finished difference. Result has 76 places, 81 transitions, 556 flow [2024-06-27 19:45:43,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=556, PETRI_PLACES=76, PETRI_TRANSITIONS=81} [2024-06-27 19:45:43,692 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 31 predicate places. [2024-06-27 19:45:43,692 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 81 transitions, 556 flow [2024-06-27 19:45:43,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:43,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:43,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:43,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 19:45:43,693 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:45:43,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:43,693 INFO L85 PathProgramCache]: Analyzing trace with hash -822505183, now seen corresponding path program 2 times [2024-06-27 19:45:43,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:43,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506493343] [2024-06-27 19:45:43,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:43,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:43,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:44,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:44,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:44,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506493343] [2024-06-27 19:45:44,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506493343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:44,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:44,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:45:44,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472694107] [2024-06-27 19:45:44,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:44,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:45:44,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:44,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:45:44,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:45:44,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:45:44,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 81 transitions, 556 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:44,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:44,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:45:44,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:45,054 INFO L124 PetriNetUnfolderBase]: 2271/3506 cut-off events. [2024-06-27 19:45:45,054 INFO L125 PetriNetUnfolderBase]: For 32442/32445 co-relation queries the response was YES. [2024-06-27 19:45:45,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15634 conditions, 3506 events. 2271/3506 cut-off events. For 32442/32445 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 17853 event pairs, 796 based on Foata normal form. 4/3506 useless extension candidates. Maximal degree in co-relation 15604. Up to 3266 conditions per place. [2024-06-27 19:45:45,072 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 77 selfloop transitions, 26 changer transitions 0/108 dead transitions. [2024-06-27 19:45:45,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 108 transitions, 902 flow [2024-06-27 19:45:45,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:45:45,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:45:45,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-27 19:45:45,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4577922077922078 [2024-06-27 19:45:45,073 INFO L175 Difference]: Start difference. First operand has 76 places, 81 transitions, 556 flow. Second operand 7 states and 141 transitions. [2024-06-27 19:45:45,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 108 transitions, 902 flow [2024-06-27 19:45:45,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 108 transitions, 870 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-27 19:45:45,089 INFO L231 Difference]: Finished difference. Result has 81 places, 84 transitions, 616 flow [2024-06-27 19:45:45,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=616, PETRI_PLACES=81, PETRI_TRANSITIONS=84} [2024-06-27 19:45:45,090 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 36 predicate places. [2024-06-27 19:45:45,090 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 84 transitions, 616 flow [2024-06-27 19:45:45,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:45,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:45,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:45,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 19:45:45,091 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:45:45,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:45,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1331933729, now seen corresponding path program 2 times [2024-06-27 19:45:45,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:45,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003016447] [2024-06-27 19:45:45,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:45,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:45,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:45,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:45,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:45,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003016447] [2024-06-27 19:45:45,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003016447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:45,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:45,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:45:45,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185569336] [2024-06-27 19:45:45,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:45,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:45:45,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:45,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:45:45,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:45:45,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 19:45:45,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 84 transitions, 616 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:45,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:45,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 19:45:45,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:46,373 INFO L124 PetriNetUnfolderBase]: 2197/3441 cut-off events. [2024-06-27 19:45:46,373 INFO L125 PetriNetUnfolderBase]: For 36526/36526 co-relation queries the response was YES. [2024-06-27 19:45:46,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15725 conditions, 3441 events. 2197/3441 cut-off events. For 36526/36526 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 17841 event pairs, 792 based on Foata normal form. 4/3442 useless extension candidates. Maximal degree in co-relation 15692. Up to 3165 conditions per place. [2024-06-27 19:45:46,423 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 81 selfloop transitions, 19 changer transitions 0/110 dead transitions. [2024-06-27 19:45:46,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 110 transitions, 966 flow [2024-06-27 19:45:46,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:45:46,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:45:46,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-27 19:45:46,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675324675324675 [2024-06-27 19:45:46,425 INFO L175 Difference]: Start difference. First operand has 81 places, 84 transitions, 616 flow. Second operand 7 states and 144 transitions. [2024-06-27 19:45:46,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 110 transitions, 966 flow [2024-06-27 19:45:46,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 110 transitions, 910 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 19:45:46,445 INFO L231 Difference]: Finished difference. Result has 84 places, 87 transitions, 644 flow [2024-06-27 19:45:46,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=644, PETRI_PLACES=84, PETRI_TRANSITIONS=87} [2024-06-27 19:45:46,446 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 39 predicate places. [2024-06-27 19:45:46,446 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 87 transitions, 644 flow [2024-06-27 19:45:46,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:46,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:46,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:46,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 19:45:46,447 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:45:46,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:46,447 INFO L85 PathProgramCache]: Analyzing trace with hash -586329823, now seen corresponding path program 3 times [2024-06-27 19:45:46,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:46,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002073312] [2024-06-27 19:45:46,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:46,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:46,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:47,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:47,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:47,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002073312] [2024-06-27 19:45:47,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002073312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:47,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:47,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:45:47,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242982899] [2024-06-27 19:45:47,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:47,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:45:47,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:47,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:45:47,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:45:47,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:45:47,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 87 transitions, 644 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:47,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:47,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:45:47,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:47,718 INFO L124 PetriNetUnfolderBase]: 2288/3530 cut-off events. [2024-06-27 19:45:47,719 INFO L125 PetriNetUnfolderBase]: For 40653/40653 co-relation queries the response was YES. [2024-06-27 19:45:47,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16408 conditions, 3530 events. 2288/3530 cut-off events. For 40653/40653 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 17938 event pairs, 792 based on Foata normal form. 2/3529 useless extension candidates. Maximal degree in co-relation 16374. Up to 3350 conditions per place. [2024-06-27 19:45:47,736 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 87 selfloop transitions, 14 changer transitions 0/106 dead transitions. [2024-06-27 19:45:47,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 106 transitions, 894 flow [2024-06-27 19:45:47,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:45:47,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:45:47,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-27 19:45:47,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 19:45:47,738 INFO L175 Difference]: Start difference. First operand has 84 places, 87 transitions, 644 flow. Second operand 7 states and 132 transitions. [2024-06-27 19:45:47,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 106 transitions, 894 flow [2024-06-27 19:45:47,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 106 transitions, 810 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 19:45:47,762 INFO L231 Difference]: Finished difference. Result has 86 places, 87 transitions, 596 flow [2024-06-27 19:45:47,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=596, PETRI_PLACES=86, PETRI_TRANSITIONS=87} [2024-06-27 19:45:47,763 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 41 predicate places. [2024-06-27 19:45:47,763 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 87 transitions, 596 flow [2024-06-27 19:45:47,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:47,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:47,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:47,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 19:45:47,763 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:45:47,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:47,764 INFO L85 PathProgramCache]: Analyzing trace with hash -586032905, now seen corresponding path program 3 times [2024-06-27 19:45:47,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:47,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524698610] [2024-06-27 19:45:47,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:47,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:47,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:48,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:48,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:48,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524698610] [2024-06-27 19:45:48,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524698610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:48,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:48,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:45:48,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512438721] [2024-06-27 19:45:48,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:48,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:45:48,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:48,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:45:48,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:45:48,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 19:45:48,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 87 transitions, 596 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:48,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:48,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 19:45:48,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:49,101 INFO L124 PetriNetUnfolderBase]: 2182/3420 cut-off events. [2024-06-27 19:45:49,101 INFO L125 PetriNetUnfolderBase]: For 44040/44040 co-relation queries the response was YES. [2024-06-27 19:45:49,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16055 conditions, 3420 events. 2182/3420 cut-off events. For 44040/44040 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 17790 event pairs, 790 based on Foata normal form. 4/3421 useless extension candidates. Maximal degree in co-relation 16021. Up to 3179 conditions per place. [2024-06-27 19:45:49,115 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 83 selfloop transitions, 14 changer transitions 0/107 dead transitions. [2024-06-27 19:45:49,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 107 transitions, 842 flow [2024-06-27 19:45:49,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:45:49,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:45:49,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-27 19:45:49,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4512987012987013 [2024-06-27 19:45:49,116 INFO L175 Difference]: Start difference. First operand has 86 places, 87 transitions, 596 flow. Second operand 7 states and 139 transitions. [2024-06-27 19:45:49,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 107 transitions, 842 flow [2024-06-27 19:45:49,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 107 transitions, 770 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 19:45:49,137 INFO L231 Difference]: Finished difference. Result has 86 places, 87 transitions, 560 flow [2024-06-27 19:45:49,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=560, PETRI_PLACES=86, PETRI_TRANSITIONS=87} [2024-06-27 19:45:49,138 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 41 predicate places. [2024-06-27 19:45:49,138 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 87 transitions, 560 flow [2024-06-27 19:45:49,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:49,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:49,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:49,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 19:45:49,139 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:45:49,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:49,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1689208518, now seen corresponding path program 1 times [2024-06-27 19:45:49,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:49,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772120473] [2024-06-27 19:45:49,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:49,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:49,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:49,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:49,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:49,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772120473] [2024-06-27 19:45:49,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772120473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:49,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:49,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:45:49,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804300782] [2024-06-27 19:45:49,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:49,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:45:49,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:49,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:45:49,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:45:49,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 19:45:49,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 87 transitions, 560 flow. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:49,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:49,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 19:45:49,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:50,254 INFO L124 PetriNetUnfolderBase]: 2655/4101 cut-off events. [2024-06-27 19:45:50,254 INFO L125 PetriNetUnfolderBase]: For 64219/64219 co-relation queries the response was YES. [2024-06-27 19:45:50,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19985 conditions, 4101 events. 2655/4101 cut-off events. For 64219/64219 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 21193 event pairs, 1093 based on Foata normal form. 1/4089 useless extension candidates. Maximal degree in co-relation 19950. Up to 3911 conditions per place. [2024-06-27 19:45:50,273 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 73 selfloop transitions, 8 changer transitions 0/98 dead transitions. [2024-06-27 19:45:50,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 98 transitions, 766 flow [2024-06-27 19:45:50,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:45:50,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:45:50,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 98 transitions. [2024-06-27 19:45:50,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44545454545454544 [2024-06-27 19:45:50,274 INFO L175 Difference]: Start difference. First operand has 86 places, 87 transitions, 560 flow. Second operand 5 states and 98 transitions. [2024-06-27 19:45:50,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 98 transitions, 766 flow [2024-06-27 19:45:50,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 98 transitions, 726 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 19:45:50,301 INFO L231 Difference]: Finished difference. Result has 85 places, 90 transitions, 572 flow [2024-06-27 19:45:50,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=520, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=572, PETRI_PLACES=85, PETRI_TRANSITIONS=90} [2024-06-27 19:45:50,302 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 40 predicate places. [2024-06-27 19:45:50,302 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 90 transitions, 572 flow [2024-06-27 19:45:50,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:50,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:50,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:50,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 19:45:50,303 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:45:50,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:50,303 INFO L85 PathProgramCache]: Analyzing trace with hash 266430616, now seen corresponding path program 1 times [2024-06-27 19:45:50,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:50,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906460440] [2024-06-27 19:45:50,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:50,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:50,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:51,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:51,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:51,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906460440] [2024-06-27 19:45:51,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906460440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:51,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:51,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:45:51,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604125332] [2024-06-27 19:45:51,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:51,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:45:51,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:51,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:45:51,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:45:51,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:45:51,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 90 transitions, 572 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:51,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:51,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:45:51,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:51,783 INFO L124 PetriNetUnfolderBase]: 2398/3685 cut-off events. [2024-06-27 19:45:51,783 INFO L125 PetriNetUnfolderBase]: For 60737/60744 co-relation queries the response was YES. [2024-06-27 19:45:51,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18712 conditions, 3685 events. 2398/3685 cut-off events. For 60737/60744 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 18882 event pairs, 834 based on Foata normal form. 4/3673 useless extension candidates. Maximal degree in co-relation 18676. Up to 3359 conditions per place. [2024-06-27 19:45:51,802 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 89 selfloop transitions, 35 changer transitions 0/130 dead transitions. [2024-06-27 19:45:51,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 130 transitions, 1044 flow [2024-06-27 19:45:51,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:45:51,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:45:51,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-27 19:45:51,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-27 19:45:51,804 INFO L175 Difference]: Start difference. First operand has 85 places, 90 transitions, 572 flow. Second operand 8 states and 164 transitions. [2024-06-27 19:45:51,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 130 transitions, 1044 flow [2024-06-27 19:45:51,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 130 transitions, 1014 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 19:45:51,832 INFO L231 Difference]: Finished difference. Result has 90 places, 96 transitions, 698 flow [2024-06-27 19:45:51,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=698, PETRI_PLACES=90, PETRI_TRANSITIONS=96} [2024-06-27 19:45:51,833 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 45 predicate places. [2024-06-27 19:45:51,833 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 96 transitions, 698 flow [2024-06-27 19:45:51,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:51,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:51,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:51,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 19:45:51,834 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:45:51,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:51,834 INFO L85 PathProgramCache]: Analyzing trace with hash 266580346, now seen corresponding path program 2 times [2024-06-27 19:45:51,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:51,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531874321] [2024-06-27 19:45:51,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:51,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:51,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:52,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:52,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:52,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531874321] [2024-06-27 19:45:52,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531874321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:52,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:52,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:45:52,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924958426] [2024-06-27 19:45:52,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:52,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:45:52,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:52,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:45:52,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:45:52,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:45:52,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 96 transitions, 698 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:52,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:52,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:45:52,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:53,418 INFO L124 PetriNetUnfolderBase]: 2409/3701 cut-off events. [2024-06-27 19:45:53,419 INFO L125 PetriNetUnfolderBase]: For 68355/68362 co-relation queries the response was YES. [2024-06-27 19:45:53,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19650 conditions, 3701 events. 2409/3701 cut-off events. For 68355/68362 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 18972 event pairs, 834 based on Foata normal form. 4/3689 useless extension candidates. Maximal degree in co-relation 19613. Up to 3371 conditions per place. [2024-06-27 19:45:53,438 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 88 selfloop transitions, 36 changer transitions 0/130 dead transitions. [2024-06-27 19:45:53,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 130 transitions, 1136 flow [2024-06-27 19:45:53,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:45:53,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:45:53,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-27 19:45:53,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4602272727272727 [2024-06-27 19:45:53,439 INFO L175 Difference]: Start difference. First operand has 90 places, 96 transitions, 698 flow. Second operand 8 states and 162 transitions. [2024-06-27 19:45:53,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 130 transitions, 1136 flow [2024-06-27 19:45:53,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 130 transitions, 1052 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-27 19:45:53,474 INFO L231 Difference]: Finished difference. Result has 94 places, 99 transitions, 736 flow [2024-06-27 19:45:53,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=736, PETRI_PLACES=94, PETRI_TRANSITIONS=99} [2024-06-27 19:45:53,474 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 49 predicate places. [2024-06-27 19:45:53,474 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 99 transitions, 736 flow [2024-06-27 19:45:53,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:53,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:53,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:53,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 19:45:53,475 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:45:53,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:53,475 INFO L85 PathProgramCache]: Analyzing trace with hash 2046053451, now seen corresponding path program 1 times [2024-06-27 19:45:53,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:53,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536921366] [2024-06-27 19:45:53,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:53,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:53,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:54,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:54,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:54,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536921366] [2024-06-27 19:45:54,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536921366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:54,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:54,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:45:54,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45594315] [2024-06-27 19:45:54,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:54,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:45:54,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:54,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:45:54,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:45:54,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:45:54,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 99 transitions, 736 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:54,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:54,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:45:54,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:54,984 INFO L124 PetriNetUnfolderBase]: 2454/3759 cut-off events. [2024-06-27 19:45:54,984 INFO L125 PetriNetUnfolderBase]: For 75746/75753 co-relation queries the response was YES. [2024-06-27 19:45:55,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20249 conditions, 3759 events. 2454/3759 cut-off events. For 75746/75753 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 19191 event pairs, 801 based on Foata normal form. 4/3744 useless extension candidates. Maximal degree in co-relation 20210. Up to 3342 conditions per place. [2024-06-27 19:45:55,044 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 93 selfloop transitions, 40 changer transitions 0/139 dead transitions. [2024-06-27 19:45:55,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 139 transitions, 1242 flow [2024-06-27 19:45:55,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:45:55,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:45:55,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-27 19:45:55,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715909090909091 [2024-06-27 19:45:55,046 INFO L175 Difference]: Start difference. First operand has 94 places, 99 transitions, 736 flow. Second operand 8 states and 166 transitions. [2024-06-27 19:45:55,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 139 transitions, 1242 flow [2024-06-27 19:45:55,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 139 transitions, 1169 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 19:45:55,087 INFO L231 Difference]: Finished difference. Result has 97 places, 105 transitions, 833 flow [2024-06-27 19:45:55,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=663, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=833, PETRI_PLACES=97, PETRI_TRANSITIONS=105} [2024-06-27 19:45:55,088 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 52 predicate places. [2024-06-27 19:45:55,088 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 105 transitions, 833 flow [2024-06-27 19:45:55,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:55,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:55,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:55,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 19:45:55,089 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:45:55,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:55,089 INFO L85 PathProgramCache]: Analyzing trace with hash 2051617424, now seen corresponding path program 3 times [2024-06-27 19:45:55,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:55,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800956472] [2024-06-27 19:45:55,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:55,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:55,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:56,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:56,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:56,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800956472] [2024-06-27 19:45:56,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800956472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:56,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:56,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:45:56,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636698710] [2024-06-27 19:45:56,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:56,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:45:56,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:56,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:45:56,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:45:56,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:45:56,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 105 transitions, 833 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:56,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:56,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:45:56,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:56,732 INFO L124 PetriNetUnfolderBase]: 2465/3771 cut-off events. [2024-06-27 19:45:56,732 INFO L125 PetriNetUnfolderBase]: For 83680/83687 co-relation queries the response was YES. [2024-06-27 19:45:56,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21128 conditions, 3771 events. 2465/3771 cut-off events. For 83680/83687 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 19265 event pairs, 834 based on Foata normal form. 4/3757 useless extension candidates. Maximal degree in co-relation 21088. Up to 3445 conditions per place. [2024-06-27 19:45:56,753 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 92 selfloop transitions, 38 changer transitions 0/136 dead transitions. [2024-06-27 19:45:56,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 136 transitions, 1276 flow [2024-06-27 19:45:56,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:45:56,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:45:56,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 19:45:56,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 19:45:56,755 INFO L175 Difference]: Start difference. First operand has 97 places, 105 transitions, 833 flow. Second operand 8 states and 160 transitions. [2024-06-27 19:45:56,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 136 transitions, 1276 flow [2024-06-27 19:45:56,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 136 transitions, 1206 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-27 19:45:56,795 INFO L231 Difference]: Finished difference. Result has 101 places, 108 transitions, 882 flow [2024-06-27 19:45:56,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=763, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=882, PETRI_PLACES=101, PETRI_TRANSITIONS=108} [2024-06-27 19:45:56,796 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 56 predicate places. [2024-06-27 19:45:56,796 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 108 transitions, 882 flow [2024-06-27 19:45:56,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:56,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:56,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:56,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 19:45:56,797 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:45:56,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:56,797 INFO L85 PathProgramCache]: Analyzing trace with hash 2051625081, now seen corresponding path program 2 times [2024-06-27 19:45:56,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:56,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344275022] [2024-06-27 19:45:56,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:56,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:56,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:57,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:57,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:57,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344275022] [2024-06-27 19:45:57,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344275022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:57,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:57,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:45:57,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714583363] [2024-06-27 19:45:57,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:57,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:45:57,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:57,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:45:57,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:45:57,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:45:57,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 108 transitions, 882 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:57,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:57,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:45:57,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:58,312 INFO L124 PetriNetUnfolderBase]: 2519/3853 cut-off events. [2024-06-27 19:45:58,312 INFO L125 PetriNetUnfolderBase]: For 92603/92610 co-relation queries the response was YES. [2024-06-27 19:45:58,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21996 conditions, 3853 events. 2519/3853 cut-off events. For 92603/92610 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 19729 event pairs, 808 based on Foata normal form. 4/3838 useless extension candidates. Maximal degree in co-relation 21954. Up to 3404 conditions per place. [2024-06-27 19:45:58,335 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 97 selfloop transitions, 44 changer transitions 0/147 dead transitions. [2024-06-27 19:45:58,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 147 transitions, 1490 flow [2024-06-27 19:45:58,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:45:58,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:45:58,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-27 19:45:58,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715909090909091 [2024-06-27 19:45:58,336 INFO L175 Difference]: Start difference. First operand has 101 places, 108 transitions, 882 flow. Second operand 8 states and 166 transitions. [2024-06-27 19:45:58,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 147 transitions, 1490 flow [2024-06-27 19:45:58,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 147 transitions, 1414 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 19:45:58,376 INFO L231 Difference]: Finished difference. Result has 104 places, 114 transitions, 978 flow [2024-06-27 19:45:58,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=806, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=978, PETRI_PLACES=104, PETRI_TRANSITIONS=114} [2024-06-27 19:45:58,377 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 59 predicate places. [2024-06-27 19:45:58,377 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 114 transitions, 978 flow [2024-06-27 19:45:58,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:58,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:58,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:58,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 19:45:58,378 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:45:58,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:58,378 INFO L85 PathProgramCache]: Analyzing trace with hash 272144753, now seen corresponding path program 3 times [2024-06-27 19:45:58,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:58,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394703008] [2024-06-27 19:45:58,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:58,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:58,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:59,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:59,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:59,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394703008] [2024-06-27 19:45:59,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394703008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:59,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:59,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:45:59,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608714018] [2024-06-27 19:45:59,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:59,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:45:59,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:59,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:45:59,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:45:59,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:45:59,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 114 transitions, 978 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:59,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:59,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:45:59,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:59,823 INFO L124 PetriNetUnfolderBase]: 2509/3839 cut-off events. [2024-06-27 19:45:59,823 INFO L125 PetriNetUnfolderBase]: For 99734/99741 co-relation queries the response was YES. [2024-06-27 19:45:59,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22278 conditions, 3839 events. 2509/3839 cut-off events. For 99734/99741 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 19665 event pairs, 806 based on Foata normal form. 4/3824 useless extension candidates. Maximal degree in co-relation 22235. Up to 3396 conditions per place. [2024-06-27 19:45:59,845 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 97 selfloop transitions, 43 changer transitions 0/146 dead transitions. [2024-06-27 19:45:59,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 146 transitions, 1430 flow [2024-06-27 19:45:59,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:45:59,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:45:59,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-27 19:45:59,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715909090909091 [2024-06-27 19:45:59,847 INFO L175 Difference]: Start difference. First operand has 104 places, 114 transitions, 978 flow. Second operand 8 states and 166 transitions. [2024-06-27 19:45:59,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 146 transitions, 1430 flow [2024-06-27 19:45:59,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 146 transitions, 1324 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-27 19:45:59,917 INFO L231 Difference]: Finished difference. Result has 108 places, 114 transitions, 966 flow [2024-06-27 19:45:59,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=872, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=966, PETRI_PLACES=108, PETRI_TRANSITIONS=114} [2024-06-27 19:45:59,918 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 63 predicate places. [2024-06-27 19:45:59,918 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 114 transitions, 966 flow [2024-06-27 19:45:59,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:59,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:59,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:59,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 19:45:59,919 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:45:59,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:59,919 INFO L85 PathProgramCache]: Analyzing trace with hash -2013714171, now seen corresponding path program 4 times [2024-06-27 19:45:59,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:59,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676162407] [2024-06-27 19:45:59,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:59,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:59,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:00,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:00,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:00,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676162407] [2024-06-27 19:46:00,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676162407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:00,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:00,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:46:00,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047848284] [2024-06-27 19:46:00,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:00,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:46:00,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:00,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:46:00,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:46:00,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:46:00,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 114 transitions, 966 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:00,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:00,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:46:00,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:01,412 INFO L124 PetriNetUnfolderBase]: 2531/3871 cut-off events. [2024-06-27 19:46:01,412 INFO L125 PetriNetUnfolderBase]: For 107668/107672 co-relation queries the response was YES. [2024-06-27 19:46:01,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22739 conditions, 3871 events. 2531/3871 cut-off events. For 107668/107672 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 19834 event pairs, 835 based on Foata normal form. 4/3858 useless extension candidates. Maximal degree in co-relation 22695. Up to 3619 conditions per place. [2024-06-27 19:46:01,432 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 119 selfloop transitions, 17 changer transitions 0/142 dead transitions. [2024-06-27 19:46:01,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 142 transitions, 1351 flow [2024-06-27 19:46:01,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:46:01,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:46:01,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 19:46:01,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-27 19:46:01,434 INFO L175 Difference]: Start difference. First operand has 108 places, 114 transitions, 966 flow. Second operand 8 states and 151 transitions. [2024-06-27 19:46:01,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 142 transitions, 1351 flow [2024-06-27 19:46:01,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 142 transitions, 1251 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 19:46:01,487 INFO L231 Difference]: Finished difference. Result has 109 places, 117 transitions, 961 flow [2024-06-27 19:46:01,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=872, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=961, PETRI_PLACES=109, PETRI_TRANSITIONS=117} [2024-06-27 19:46:01,487 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 64 predicate places. [2024-06-27 19:46:01,487 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 117 transitions, 961 flow [2024-06-27 19:46:01,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:01,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:01,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:01,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 19:46:01,488 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:01,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:01,489 INFO L85 PathProgramCache]: Analyzing trace with hash -996346239, now seen corresponding path program 5 times [2024-06-27 19:46:01,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:01,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835631076] [2024-06-27 19:46:01,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:01,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:01,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:02,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:02,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:02,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835631076] [2024-06-27 19:46:02,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835631076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:02,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:02,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:46:02,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275816282] [2024-06-27 19:46:02,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:02,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:46:02,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:02,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:46:02,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:46:02,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:46:02,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 117 transitions, 961 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:02,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:02,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:46:02,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:02,931 INFO L124 PetriNetUnfolderBase]: 2553/3908 cut-off events. [2024-06-27 19:46:02,931 INFO L125 PetriNetUnfolderBase]: For 117067/117071 co-relation queries the response was YES. [2024-06-27 19:46:02,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23165 conditions, 3908 events. 2553/3908 cut-off events. For 117067/117071 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 20004 event pairs, 835 based on Foata normal form. 4/3895 useless extension candidates. Maximal degree in co-relation 23120. Up to 3568 conditions per place. [2024-06-27 19:46:02,954 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 113 selfloop transitions, 29 changer transitions 0/148 dead transitions. [2024-06-27 19:46:02,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 148 transitions, 1460 flow [2024-06-27 19:46:02,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:46:02,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:46:02,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 19:46:02,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-27 19:46:02,965 INFO L175 Difference]: Start difference. First operand has 109 places, 117 transitions, 961 flow. Second operand 8 states and 158 transitions. [2024-06-27 19:46:02,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 148 transitions, 1460 flow [2024-06-27 19:46:03,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 148 transitions, 1404 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 19:46:03,035 INFO L231 Difference]: Finished difference. Result has 111 places, 120 transitions, 1018 flow [2024-06-27 19:46:03,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=905, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1018, PETRI_PLACES=111, PETRI_TRANSITIONS=120} [2024-06-27 19:46:03,035 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 66 predicate places. [2024-06-27 19:46:03,035 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 120 transitions, 1018 flow [2024-06-27 19:46:03,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:03,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:03,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:03,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 19:46:03,036 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:03,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:03,036 INFO L85 PathProgramCache]: Analyzing trace with hash -996353679, now seen corresponding path program 6 times [2024-06-27 19:46:03,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:03,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979984188] [2024-06-27 19:46:03,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:03,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:03,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:03,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:03,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:03,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979984188] [2024-06-27 19:46:03,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979984188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:03,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:03,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:46:03,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836038123] [2024-06-27 19:46:03,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:03,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:46:03,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:03,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:46:03,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:46:03,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:46:03,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 120 transitions, 1018 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:03,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:03,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:46:03,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:04,503 INFO L124 PetriNetUnfolderBase]: 2543/3894 cut-off events. [2024-06-27 19:46:04,504 INFO L125 PetriNetUnfolderBase]: For 124362/124366 co-relation queries the response was YES. [2024-06-27 19:46:04,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23374 conditions, 3894 events. 2543/3894 cut-off events. For 124362/124366 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 19984 event pairs, 828 based on Foata normal form. 4/3881 useless extension candidates. Maximal degree in co-relation 23328. Up to 3560 conditions per place. [2024-06-27 19:46:04,529 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 110 selfloop transitions, 30 changer transitions 0/146 dead transitions. [2024-06-27 19:46:04,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 146 transitions, 1368 flow [2024-06-27 19:46:04,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:46:04,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:46:04,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 19:46:04,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-27 19:46:04,532 INFO L175 Difference]: Start difference. First operand has 111 places, 120 transitions, 1018 flow. Second operand 8 states and 155 transitions. [2024-06-27 19:46:04,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 146 transitions, 1368 flow [2024-06-27 19:46:04,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 146 transitions, 1234 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-27 19:46:04,606 INFO L231 Difference]: Finished difference. Result has 113 places, 120 transitions, 952 flow [2024-06-27 19:46:04,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=884, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=952, PETRI_PLACES=113, PETRI_TRANSITIONS=120} [2024-06-27 19:46:04,607 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 68 predicate places. [2024-06-27 19:46:04,607 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 120 transitions, 952 flow [2024-06-27 19:46:04,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:04,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:04,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:04,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 19:46:04,608 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:04,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:04,608 INFO L85 PathProgramCache]: Analyzing trace with hash -2042260622, now seen corresponding path program 4 times [2024-06-27 19:46:04,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:04,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221098914] [2024-06-27 19:46:04,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:04,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:04,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:05,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:05,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:05,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221098914] [2024-06-27 19:46:05,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221098914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:05,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:05,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:46:05,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753549947] [2024-06-27 19:46:05,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:05,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:46:05,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:05,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:46:05,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:46:05,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:46:05,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 120 transitions, 952 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:05,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:05,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:46:05,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:06,048 INFO L124 PetriNetUnfolderBase]: 2538/3887 cut-off events. [2024-06-27 19:46:06,049 INFO L125 PetriNetUnfolderBase]: For 131150/131154 co-relation queries the response was YES. [2024-06-27 19:46:06,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23509 conditions, 3887 events. 2538/3887 cut-off events. For 131150/131154 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 19937 event pairs, 838 based on Foata normal form. 2/3872 useless extension candidates. Maximal degree in co-relation 23462. Up to 3653 conditions per place. [2024-06-27 19:46:06,072 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 120 selfloop transitions, 17 changer transitions 0/143 dead transitions. [2024-06-27 19:46:06,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 143 transitions, 1284 flow [2024-06-27 19:46:06,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:46:06,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:46:06,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 19:46:06,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42329545454545453 [2024-06-27 19:46:06,074 INFO L175 Difference]: Start difference. First operand has 113 places, 120 transitions, 952 flow. Second operand 8 states and 149 transitions. [2024-06-27 19:46:06,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 143 transitions, 1284 flow [2024-06-27 19:46:06,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 143 transitions, 1176 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-27 19:46:06,153 INFO L231 Difference]: Finished difference. Result has 113 places, 120 transitions, 886 flow [2024-06-27 19:46:06,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=844, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=886, PETRI_PLACES=113, PETRI_TRANSITIONS=120} [2024-06-27 19:46:06,154 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 68 predicate places. [2024-06-27 19:46:06,154 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 120 transitions, 886 flow [2024-06-27 19:46:06,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:06,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:06,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:06,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 19:46:06,154 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:06,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:06,154 INFO L85 PathProgramCache]: Analyzing trace with hash -986810856, now seen corresponding path program 1 times [2024-06-27 19:46:06,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:06,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693073638] [2024-06-27 19:46:06,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:06,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:06,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:07,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:07,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:07,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693073638] [2024-06-27 19:46:07,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693073638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:07,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:07,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:46:07,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003887914] [2024-06-27 19:46:07,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:07,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:46:07,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:07,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:46:07,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:46:07,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:46:07,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 120 transitions, 886 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:07,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:07,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:46:07,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:08,581 INFO L124 PetriNetUnfolderBase]: 2855/4362 cut-off events. [2024-06-27 19:46:08,581 INFO L125 PetriNetUnfolderBase]: For 161808/161812 co-relation queries the response was YES. [2024-06-27 19:46:08,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26291 conditions, 4362 events. 2855/4362 cut-off events. For 161808/161812 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 22153 event pairs, 1012 based on Foata normal form. 4/4347 useless extension candidates. Maximal degree in co-relation 26243. Up to 4047 conditions per place. [2024-06-27 19:46:08,611 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 115 selfloop transitions, 18 changer transitions 0/149 dead transitions. [2024-06-27 19:46:08,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 149 transitions, 1268 flow [2024-06-27 19:46:08,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:46:08,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:46:08,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 19:46:08,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-27 19:46:08,612 INFO L175 Difference]: Start difference. First operand has 113 places, 120 transitions, 886 flow. Second operand 8 states and 150 transitions. [2024-06-27 19:46:08,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 149 transitions, 1268 flow [2024-06-27 19:46:08,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 149 transitions, 1180 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-27 19:46:08,669 INFO L231 Difference]: Finished difference. Result has 112 places, 125 transitions, 907 flow [2024-06-27 19:46:08,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=798, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=907, PETRI_PLACES=112, PETRI_TRANSITIONS=125} [2024-06-27 19:46:08,669 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 67 predicate places. [2024-06-27 19:46:08,670 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 125 transitions, 907 flow [2024-06-27 19:46:08,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:08,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:08,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:08,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 19:46:08,670 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:08,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:08,671 INFO L85 PathProgramCache]: Analyzing trace with hash -778487789, now seen corresponding path program 1 times [2024-06-27 19:46:08,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:08,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358554949] [2024-06-27 19:46:08,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:08,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:08,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:09,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:09,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:09,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358554949] [2024-06-27 19:46:09,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358554949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:09,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:09,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:46:09,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577907012] [2024-06-27 19:46:09,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:09,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:46:09,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:09,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:46:09,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:46:09,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 19:46:09,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 125 transitions, 907 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:09,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:09,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 19:46:09,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:09,997 INFO L124 PetriNetUnfolderBase]: 2778/4306 cut-off events. [2024-06-27 19:46:09,998 INFO L125 PetriNetUnfolderBase]: For 168508/168508 co-relation queries the response was YES. [2024-06-27 19:46:10,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26512 conditions, 4306 events. 2778/4306 cut-off events. For 168508/168508 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 22089 event pairs, 1061 based on Foata normal form. 3/4306 useless extension candidates. Maximal degree in co-relation 26463. Up to 4017 conditions per place. [2024-06-27 19:46:10,032 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 97 selfloop transitions, 11 changer transitions 0/139 dead transitions. [2024-06-27 19:46:10,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 139 transitions, 1179 flow [2024-06-27 19:46:10,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:46:10,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:46:10,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-27 19:46:10,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4356060606060606 [2024-06-27 19:46:10,033 INFO L175 Difference]: Start difference. First operand has 112 places, 125 transitions, 907 flow. Second operand 6 states and 115 transitions. [2024-06-27 19:46:10,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 139 transitions, 1179 flow [2024-06-27 19:46:10,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 139 transitions, 1114 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 19:46:10,101 INFO L231 Difference]: Finished difference. Result has 113 places, 128 transitions, 906 flow [2024-06-27 19:46:10,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=842, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=906, PETRI_PLACES=113, PETRI_TRANSITIONS=128} [2024-06-27 19:46:10,102 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 68 predicate places. [2024-06-27 19:46:10,102 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 128 transitions, 906 flow [2024-06-27 19:46:10,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:10,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:10,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:10,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 19:46:10,103 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:10,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:10,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1001619322, now seen corresponding path program 1 times [2024-06-27 19:46:10,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:10,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425184401] [2024-06-27 19:46:10,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:10,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:10,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:11,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:11,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:11,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425184401] [2024-06-27 19:46:11,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425184401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:11,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:11,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:46:11,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003237384] [2024-06-27 19:46:11,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:11,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:46:11,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:11,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:46:11,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:46:11,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:46:11,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 128 transitions, 906 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:11,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:11,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:46:11,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:12,076 INFO L124 PetriNetUnfolderBase]: 2848/4347 cut-off events. [2024-06-27 19:46:12,076 INFO L125 PetriNetUnfolderBase]: For 174994/174994 co-relation queries the response was YES. [2024-06-27 19:46:12,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27406 conditions, 4347 events. 2848/4347 cut-off events. For 174994/174994 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 22394 event pairs, 915 based on Foata normal form. 2/4334 useless extension candidates. Maximal degree in co-relation 27356. Up to 4051 conditions per place. [2024-06-27 19:46:12,103 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 143 selfloop transitions, 20 changer transitions 0/170 dead transitions. [2024-06-27 19:46:12,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 170 transitions, 1376 flow [2024-06-27 19:46:12,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:46:12,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:46:12,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-27 19:46:12,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494949494949495 [2024-06-27 19:46:12,104 INFO L175 Difference]: Start difference. First operand has 113 places, 128 transitions, 906 flow. Second operand 9 states and 178 transitions. [2024-06-27 19:46:12,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 170 transitions, 1376 flow [2024-06-27 19:46:12,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 170 transitions, 1334 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 19:46:12,161 INFO L231 Difference]: Finished difference. Result has 118 places, 131 transitions, 962 flow [2024-06-27 19:46:12,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=864, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=962, PETRI_PLACES=118, PETRI_TRANSITIONS=131} [2024-06-27 19:46:12,162 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 73 predicate places. [2024-06-27 19:46:12,162 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 131 transitions, 962 flow [2024-06-27 19:46:12,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:12,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:12,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:12,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 19:46:12,163 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:12,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:12,163 INFO L85 PathProgramCache]: Analyzing trace with hash -330583846, now seen corresponding path program 1 times [2024-06-27 19:46:12,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:12,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683139581] [2024-06-27 19:46:12,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:12,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:12,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:13,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:13,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:13,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683139581] [2024-06-27 19:46:13,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683139581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:13,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:13,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:46:13,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505771997] [2024-06-27 19:46:13,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:13,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:46:13,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:13,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:46:13,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:46:13,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:46:13,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 131 transitions, 962 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:13,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:13,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:46:13,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:13,860 INFO L124 PetriNetUnfolderBase]: 2912/4441 cut-off events. [2024-06-27 19:46:13,861 INFO L125 PetriNetUnfolderBase]: For 190712/190715 co-relation queries the response was YES. [2024-06-27 19:46:13,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28786 conditions, 4441 events. 2912/4441 cut-off events. For 190712/190715 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 22957 event pairs, 811 based on Foata normal form. 4/4430 useless extension candidates. Maximal degree in co-relation 28735. Up to 3747 conditions per place. [2024-06-27 19:46:13,890 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 102 selfloop transitions, 70 changer transitions 0/179 dead transitions. [2024-06-27 19:46:13,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 179 transitions, 1622 flow [2024-06-27 19:46:13,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:46:13,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:46:13,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-27 19:46:13,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-27 19:46:13,891 INFO L175 Difference]: Start difference. First operand has 118 places, 131 transitions, 962 flow. Second operand 9 states and 189 transitions. [2024-06-27 19:46:13,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 179 transitions, 1622 flow [2024-06-27 19:46:13,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 179 transitions, 1548 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-27 19:46:13,984 INFO L231 Difference]: Finished difference. Result has 120 places, 137 transitions, 1130 flow [2024-06-27 19:46:13,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=888, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1130, PETRI_PLACES=120, PETRI_TRANSITIONS=137} [2024-06-27 19:46:13,984 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 75 predicate places. [2024-06-27 19:46:13,984 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 137 transitions, 1130 flow [2024-06-27 19:46:13,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:13,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:13,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:13,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 19:46:13,985 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:13,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:13,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1001499352, now seen corresponding path program 2 times [2024-06-27 19:46:13,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:13,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522912361] [2024-06-27 19:46:13,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:13,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:13,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:14,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:14,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:14,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522912361] [2024-06-27 19:46:14,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522912361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:14,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:14,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:46:14,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952107403] [2024-06-27 19:46:14,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:14,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:46:14,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:14,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:46:14,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:46:15,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:46:15,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 137 transitions, 1130 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:15,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:15,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:46:15,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:15,817 INFO L124 PetriNetUnfolderBase]: 2904/4427 cut-off events. [2024-06-27 19:46:15,818 INFO L125 PetriNetUnfolderBase]: For 202180/202183 co-relation queries the response was YES. [2024-06-27 19:46:15,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29667 conditions, 4427 events. 2904/4427 cut-off events. For 202180/202183 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 22791 event pairs, 945 based on Foata normal form. 4/4418 useless extension candidates. Maximal degree in co-relation 29615. Up to 4020 conditions per place. [2024-06-27 19:46:15,843 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 125 selfloop transitions, 49 changer transitions 0/181 dead transitions. [2024-06-27 19:46:15,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 181 transitions, 1798 flow [2024-06-27 19:46:15,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:46:15,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:46:15,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-27 19:46:15,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-27 19:46:15,845 INFO L175 Difference]: Start difference. First operand has 120 places, 137 transitions, 1130 flow. Second operand 9 states and 183 transitions. [2024-06-27 19:46:15,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 181 transitions, 1798 flow [2024-06-27 19:46:15,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 181 transitions, 1681 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-27 19:46:15,943 INFO L231 Difference]: Finished difference. Result has 124 places, 143 transitions, 1229 flow [2024-06-27 19:46:15,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1013, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1229, PETRI_PLACES=124, PETRI_TRANSITIONS=143} [2024-06-27 19:46:15,943 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 79 predicate places. [2024-06-27 19:46:15,943 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 143 transitions, 1229 flow [2024-06-27 19:46:15,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:15,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:15,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:15,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 19:46:15,944 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:15,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:15,944 INFO L85 PathProgramCache]: Analyzing trace with hash -996851026, now seen corresponding path program 2 times [2024-06-27 19:46:15,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:15,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113298801] [2024-06-27 19:46:15,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:15,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:15,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:16,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:16,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:16,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113298801] [2024-06-27 19:46:16,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113298801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:16,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:16,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:46:16,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389189755] [2024-06-27 19:46:16,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:16,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:46:16,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:16,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:46:16,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:46:17,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:46:17,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 143 transitions, 1229 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:17,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:17,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:46:17,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:17,643 INFO L124 PetriNetUnfolderBase]: 2977/4540 cut-off events. [2024-06-27 19:46:17,643 INFO L125 PetriNetUnfolderBase]: For 221370/221373 co-relation queries the response was YES. [2024-06-27 19:46:17,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31210 conditions, 4540 events. 2977/4540 cut-off events. For 221370/221373 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 23564 event pairs, 814 based on Foata normal form. 4/4529 useless extension candidates. Maximal degree in co-relation 31156. Up to 3809 conditions per place. [2024-06-27 19:46:17,675 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 113 selfloop transitions, 70 changer transitions 0/190 dead transitions. [2024-06-27 19:46:17,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 190 transitions, 2027 flow [2024-06-27 19:46:17,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:46:17,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:46:17,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-27 19:46:17,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-27 19:46:17,677 INFO L175 Difference]: Start difference. First operand has 124 places, 143 transitions, 1229 flow. Second operand 9 states and 189 transitions. [2024-06-27 19:46:17,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 190 transitions, 2027 flow [2024-06-27 19:46:17,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 190 transitions, 1929 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-27 19:46:17,785 INFO L231 Difference]: Finished difference. Result has 128 places, 149 transitions, 1355 flow [2024-06-27 19:46:17,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1131, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1355, PETRI_PLACES=128, PETRI_TRANSITIONS=149} [2024-06-27 19:46:17,785 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 83 predicate places. [2024-06-27 19:46:17,785 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 149 transitions, 1355 flow [2024-06-27 19:46:17,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:17,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:17,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:17,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 19:46:17,786 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:17,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:17,786 INFO L85 PathProgramCache]: Analyzing trace with hash -325942402, now seen corresponding path program 3 times [2024-06-27 19:46:17,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:17,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933104206] [2024-06-27 19:46:17,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:17,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:17,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:18,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:18,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:18,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933104206] [2024-06-27 19:46:18,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933104206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:18,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:18,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:46:18,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689286436] [2024-06-27 19:46:18,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:18,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:46:18,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:18,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:46:18,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:46:18,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:46:18,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 149 transitions, 1355 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:18,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:18,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:46:18,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:19,517 INFO L124 PetriNetUnfolderBase]: 2986/4555 cut-off events. [2024-06-27 19:46:19,517 INFO L125 PetriNetUnfolderBase]: For 233398/233401 co-relation queries the response was YES. [2024-06-27 19:46:19,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31951 conditions, 4555 events. 2986/4555 cut-off events. For 233398/233401 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 23695 event pairs, 885 based on Foata normal form. 4/4542 useless extension candidates. Maximal degree in co-relation 31895. Up to 4131 conditions per place. [2024-06-27 19:46:19,547 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 130 selfloop transitions, 50 changer transitions 0/187 dead transitions. [2024-06-27 19:46:19,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 187 transitions, 1977 flow [2024-06-27 19:46:19,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:46:19,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:46:19,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-27 19:46:19,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45707070707070707 [2024-06-27 19:46:19,549 INFO L175 Difference]: Start difference. First operand has 128 places, 149 transitions, 1355 flow. Second operand 9 states and 181 transitions. [2024-06-27 19:46:19,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 187 transitions, 1977 flow [2024-06-27 19:46:19,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 187 transitions, 1853 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 19:46:19,679 INFO L231 Difference]: Finished difference. Result has 132 places, 152 transitions, 1385 flow [2024-06-27 19:46:19,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1231, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1385, PETRI_PLACES=132, PETRI_TRANSITIONS=152} [2024-06-27 19:46:19,679 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 87 predicate places. [2024-06-27 19:46:19,680 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 152 transitions, 1385 flow [2024-06-27 19:46:19,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:19,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:19,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:19,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 19:46:19,680 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:19,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:19,680 INFO L85 PathProgramCache]: Analyzing trace with hash -996857536, now seen corresponding path program 3 times [2024-06-27 19:46:19,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:19,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165234723] [2024-06-27 19:46:19,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:19,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:19,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:20,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:20,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:20,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165234723] [2024-06-27 19:46:20,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165234723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:20,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:20,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:46:20,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086944081] [2024-06-27 19:46:20,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:20,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:46:20,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:20,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:46:20,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:46:20,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:46:20,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 152 transitions, 1385 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:20,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:20,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:46:20,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:21,467 INFO L124 PetriNetUnfolderBase]: 2978/4542 cut-off events. [2024-06-27 19:46:21,467 INFO L125 PetriNetUnfolderBase]: For 245237/245240 co-relation queries the response was YES. [2024-06-27 19:46:21,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32009 conditions, 4542 events. 2978/4542 cut-off events. For 245237/245240 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 23590 event pairs, 812 based on Foata normal form. 4/4531 useless extension candidates. Maximal degree in co-relation 31952. Up to 3817 conditions per place. [2024-06-27 19:46:21,500 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 116 selfloop transitions, 69 changer transitions 0/192 dead transitions. [2024-06-27 19:46:21,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 192 transitions, 1995 flow [2024-06-27 19:46:21,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:46:21,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:46:21,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-27 19:46:21,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-27 19:46:21,501 INFO L175 Difference]: Start difference. First operand has 132 places, 152 transitions, 1385 flow. Second operand 9 states and 189 transitions. [2024-06-27 19:46:21,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 192 transitions, 1995 flow [2024-06-27 19:46:21,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 192 transitions, 1864 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 19:46:21,676 INFO L231 Difference]: Finished difference. Result has 135 places, 152 transitions, 1400 flow [2024-06-27 19:46:21,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1254, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1400, PETRI_PLACES=135, PETRI_TRANSITIONS=152} [2024-06-27 19:46:21,677 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 90 predicate places. [2024-06-27 19:46:21,677 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 152 transitions, 1400 flow [2024-06-27 19:46:21,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:21,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:21,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:21,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 19:46:21,677 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:21,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:21,677 INFO L85 PathProgramCache]: Analyzing trace with hash -153215176, now seen corresponding path program 4 times [2024-06-27 19:46:21,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:21,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291190720] [2024-06-27 19:46:21,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:21,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:21,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:22,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:22,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:22,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291190720] [2024-06-27 19:46:22,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291190720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:22,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:22,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:46:22,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167543886] [2024-06-27 19:46:22,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:22,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:46:22,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:22,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:46:22,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:46:22,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:46:22,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 152 transitions, 1400 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:22,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:22,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:46:22,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:23,449 INFO L124 PetriNetUnfolderBase]: 3032/4625 cut-off events. [2024-06-27 19:46:23,450 INFO L125 PetriNetUnfolderBase]: For 262131/262134 co-relation queries the response was YES. [2024-06-27 19:46:23,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33067 conditions, 4625 events. 3032/4625 cut-off events. For 262131/262134 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 24094 event pairs, 836 based on Foata normal form. 4/4614 useless extension candidates. Maximal degree in co-relation 33009. Up to 3863 conditions per place. [2024-06-27 19:46:23,481 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 114 selfloop transitions, 75 changer transitions 0/196 dead transitions. [2024-06-27 19:46:23,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 196 transitions, 2244 flow [2024-06-27 19:46:23,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:46:23,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:46:23,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-27 19:46:23,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-27 19:46:23,482 INFO L175 Difference]: Start difference. First operand has 135 places, 152 transitions, 1400 flow. Second operand 9 states and 187 transitions. [2024-06-27 19:46:23,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 196 transitions, 2244 flow [2024-06-27 19:46:23,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 196 transitions, 2086 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 19:46:23,617 INFO L231 Difference]: Finished difference. Result has 136 places, 158 transitions, 1494 flow [2024-06-27 19:46:23,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1254, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1494, PETRI_PLACES=136, PETRI_TRANSITIONS=158} [2024-06-27 19:46:23,618 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 91 predicate places. [2024-06-27 19:46:23,618 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 158 transitions, 1494 flow [2024-06-27 19:46:23,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:23,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:23,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:23,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 19:46:23,618 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:23,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:23,619 INFO L85 PathProgramCache]: Analyzing trace with hash -153452326, now seen corresponding path program 5 times [2024-06-27 19:46:23,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:23,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108097519] [2024-06-27 19:46:23,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:23,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:23,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:24,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:24,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:24,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108097519] [2024-06-27 19:46:24,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108097519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:24,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:24,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:46:24,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82114893] [2024-06-27 19:46:24,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:24,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:46:24,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:24,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:46:24,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:46:24,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:46:24,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 158 transitions, 1494 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:24,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:24,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:46:24,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:25,460 INFO L124 PetriNetUnfolderBase]: 3054/4657 cut-off events. [2024-06-27 19:46:25,460 INFO L125 PetriNetUnfolderBase]: For 276343/276346 co-relation queries the response was YES. [2024-06-27 19:46:25,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33629 conditions, 4657 events. 3054/4657 cut-off events. For 276343/276346 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 24329 event pairs, 834 based on Foata normal form. 4/4646 useless extension candidates. Maximal degree in co-relation 33570. Up to 3882 conditions per place. [2024-06-27 19:46:25,497 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 117 selfloop transitions, 76 changer transitions 0/200 dead transitions. [2024-06-27 19:46:25,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 200 transitions, 2311 flow [2024-06-27 19:46:25,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:46:25,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:46:25,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-27 19:46:25,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-27 19:46:25,498 INFO L175 Difference]: Start difference. First operand has 136 places, 158 transitions, 1494 flow. Second operand 9 states and 189 transitions. [2024-06-27 19:46:25,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 200 transitions, 2311 flow [2024-06-27 19:46:25,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 200 transitions, 2181 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 19:46:25,648 INFO L231 Difference]: Finished difference. Result has 140 places, 161 transitions, 1571 flow [2024-06-27 19:46:25,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1371, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1571, PETRI_PLACES=140, PETRI_TRANSITIONS=161} [2024-06-27 19:46:25,649 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 95 predicate places. [2024-06-27 19:46:25,649 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 161 transitions, 1571 flow [2024-06-27 19:46:25,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:25,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:25,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:25,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 19:46:25,650 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:25,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:25,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1776607914, now seen corresponding path program 4 times [2024-06-27 19:46:25,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:25,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385619098] [2024-06-27 19:46:25,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:25,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:25,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:26,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:26,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:26,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385619098] [2024-06-27 19:46:26,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385619098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:26,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:26,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:46:26,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644903682] [2024-06-27 19:46:26,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:26,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:46:26,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:26,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:46:26,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:46:26,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:46:26,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 161 transitions, 1571 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:26,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:26,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:46:26,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:27,413 INFO L124 PetriNetUnfolderBase]: 3063/4672 cut-off events. [2024-06-27 19:46:27,414 INFO L125 PetriNetUnfolderBase]: For 289860/289863 co-relation queries the response was YES. [2024-06-27 19:46:27,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34105 conditions, 4672 events. 3063/4672 cut-off events. For 289860/289863 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 24401 event pairs, 895 based on Foata normal form. 4/4659 useless extension candidates. Maximal degree in co-relation 34045. Up to 4239 conditions per place. [2024-06-27 19:46:27,449 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 137 selfloop transitions, 52 changer transitions 0/196 dead transitions. [2024-06-27 19:46:27,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 196 transitions, 2222 flow [2024-06-27 19:46:27,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:46:27,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:46:27,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-27 19:46:27,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45202020202020204 [2024-06-27 19:46:27,451 INFO L175 Difference]: Start difference. First operand has 140 places, 161 transitions, 1571 flow. Second operand 9 states and 179 transitions. [2024-06-27 19:46:27,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 196 transitions, 2222 flow [2024-06-27 19:46:27,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 196 transitions, 2064 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 19:46:27,610 INFO L231 Difference]: Finished difference. Result has 143 places, 164 transitions, 1574 flow [2024-06-27 19:46:27,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1413, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1574, PETRI_PLACES=143, PETRI_TRANSITIONS=164} [2024-06-27 19:46:27,611 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 98 predicate places. [2024-06-27 19:46:27,611 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 164 transitions, 1574 flow [2024-06-27 19:46:27,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:27,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:27,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:27,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 19:46:27,612 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:27,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:27,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1776601218, now seen corresponding path program 6 times [2024-06-27 19:46:27,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:27,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489483302] [2024-06-27 19:46:27,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:27,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:27,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:28,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:28,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:28,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489483302] [2024-06-27 19:46:28,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489483302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:28,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:28,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:46:28,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092978460] [2024-06-27 19:46:28,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:28,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:46:28,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:28,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:46:28,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:46:28,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:46:28,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 164 transitions, 1574 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:28,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:28,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:46:28,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:29,522 INFO L124 PetriNetUnfolderBase]: 3048/4652 cut-off events. [2024-06-27 19:46:29,523 INFO L125 PetriNetUnfolderBase]: For 302517/302520 co-relation queries the response was YES. [2024-06-27 19:46:29,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34087 conditions, 4652 events. 3048/4652 cut-off events. For 302517/302520 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 24249 event pairs, 834 based on Foata normal form. 4/4641 useless extension candidates. Maximal degree in co-relation 34026. Up to 3890 conditions per place. [2024-06-27 19:46:29,560 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 119 selfloop transitions, 75 changer transitions 0/201 dead transitions. [2024-06-27 19:46:29,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 201 transitions, 2210 flow [2024-06-27 19:46:29,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:46:29,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:46:29,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-27 19:46:29,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47474747474747475 [2024-06-27 19:46:29,561 INFO L175 Difference]: Start difference. First operand has 143 places, 164 transitions, 1574 flow. Second operand 9 states and 188 transitions. [2024-06-27 19:46:29,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 201 transitions, 2210 flow [2024-06-27 19:46:29,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 201 transitions, 2074 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 19:46:29,770 INFO L231 Difference]: Finished difference. Result has 146 places, 164 transitions, 1596 flow [2024-06-27 19:46:29,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1438, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1596, PETRI_PLACES=146, PETRI_TRANSITIONS=164} [2024-06-27 19:46:29,771 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 101 predicate places. [2024-06-27 19:46:29,772 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 164 transitions, 1596 flow [2024-06-27 19:46:29,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:29,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:29,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:29,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 19:46:29,772 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:29,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:29,772 INFO L85 PathProgramCache]: Analyzing trace with hash 167792891, now seen corresponding path program 1 times [2024-06-27 19:46:29,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:29,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769978973] [2024-06-27 19:46:29,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:29,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:29,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:30,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:30,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:30,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769978973] [2024-06-27 19:46:30,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769978973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:30,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:30,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:46:30,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659622822] [2024-06-27 19:46:30,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:30,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:46:30,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:30,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:46:30,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:46:30,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 19:46:30,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 164 transitions, 1596 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:30,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:30,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 19:46:30,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:31,087 INFO L124 PetriNetUnfolderBase]: 2929/4541 cut-off events. [2024-06-27 19:46:31,087 INFO L125 PetriNetUnfolderBase]: For 322204/322215 co-relation queries the response was YES. [2024-06-27 19:46:31,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33919 conditions, 4541 events. 2929/4541 cut-off events. For 322204/322215 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 23618 event pairs, 1044 based on Foata normal form. 7/4535 useless extension candidates. Maximal degree in co-relation 33857. Up to 4158 conditions per place. [2024-06-27 19:46:31,121 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 127 selfloop transitions, 16 changer transitions 0/186 dead transitions. [2024-06-27 19:46:31,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 186 transitions, 2060 flow [2024-06-27 19:46:31,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:46:31,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:46:31,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-27 19:46:31,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-27 19:46:31,122 INFO L175 Difference]: Start difference. First operand has 146 places, 164 transitions, 1596 flow. Second operand 6 states and 122 transitions. [2024-06-27 19:46:31,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 186 transitions, 2060 flow [2024-06-27 19:46:31,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 186 transitions, 1874 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 19:46:31,357 INFO L231 Difference]: Finished difference. Result has 143 places, 170 transitions, 1514 flow [2024-06-27 19:46:31,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1410, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1514, PETRI_PLACES=143, PETRI_TRANSITIONS=170} [2024-06-27 19:46:31,358 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 98 predicate places. [2024-06-27 19:46:31,358 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 170 transitions, 1514 flow [2024-06-27 19:46:31,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:31,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:31,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:31,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 19:46:31,359 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:31,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:31,359 INFO L85 PathProgramCache]: Analyzing trace with hash -536553576, now seen corresponding path program 1 times [2024-06-27 19:46:31,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:31,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632552264] [2024-06-27 19:46:31,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:31,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:31,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:32,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:32,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:32,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632552264] [2024-06-27 19:46:32,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632552264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:32,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:32,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:46:32,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894969990] [2024-06-27 19:46:32,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:32,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:46:32,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:32,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:46:32,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:46:32,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:46:32,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 170 transitions, 1514 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:32,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:32,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:46:32,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:33,230 INFO L124 PetriNetUnfolderBase]: 3096/4712 cut-off events. [2024-06-27 19:46:33,230 INFO L125 PetriNetUnfolderBase]: For 339655/339666 co-relation queries the response was YES. [2024-06-27 19:46:33,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35466 conditions, 4712 events. 3096/4712 cut-off events. For 339655/339666 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 23959 event pairs, 971 based on Foata normal form. 8/4685 useless extension candidates. Maximal degree in co-relation 35403. Up to 4359 conditions per place. [2024-06-27 19:46:33,265 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 160 selfloop transitions, 22 changer transitions 0/200 dead transitions. [2024-06-27 19:46:33,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 200 transitions, 2020 flow [2024-06-27 19:46:33,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:46:33,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:46:33,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 19:46:33,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-27 19:46:33,266 INFO L175 Difference]: Start difference. First operand has 143 places, 170 transitions, 1514 flow. Second operand 8 states and 151 transitions. [2024-06-27 19:46:33,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 200 transitions, 2020 flow [2024-06-27 19:46:33,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 200 transitions, 1988 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-27 19:46:33,507 INFO L231 Difference]: Finished difference. Result has 149 places, 176 transitions, 1630 flow [2024-06-27 19:46:33,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1482, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1630, PETRI_PLACES=149, PETRI_TRANSITIONS=176} [2024-06-27 19:46:33,508 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 104 predicate places. [2024-06-27 19:46:33,508 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 176 transitions, 1630 flow [2024-06-27 19:46:33,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:33,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:33,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:33,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 19:46:33,508 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:33,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:33,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1122712528, now seen corresponding path program 7 times [2024-06-27 19:46:33,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:33,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890362240] [2024-06-27 19:46:33,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:33,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:33,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:34,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:34,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:34,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890362240] [2024-06-27 19:46:34,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890362240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:34,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:34,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:46:34,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919278656] [2024-06-27 19:46:34,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:34,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:46:34,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:34,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:46:34,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:46:34,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:46:34,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 176 transitions, 1630 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:34,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:34,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:46:34,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:35,279 INFO L124 PetriNetUnfolderBase]: 3092/4710 cut-off events. [2024-06-27 19:46:35,279 INFO L125 PetriNetUnfolderBase]: For 347910/347910 co-relation queries the response was YES. [2024-06-27 19:46:35,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35966 conditions, 4710 events. 3092/4710 cut-off events. For 347910/347910 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 24583 event pairs, 891 based on Foata normal form. 6/4702 useless extension candidates. Maximal degree in co-relation 35901. Up to 4342 conditions per place. [2024-06-27 19:46:35,317 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 175 selfloop transitions, 25 changer transitions 0/209 dead transitions. [2024-06-27 19:46:35,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 209 transitions, 2154 flow [2024-06-27 19:46:35,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:46:35,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:46:35,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 19:46:35,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42676767676767674 [2024-06-27 19:46:35,318 INFO L175 Difference]: Start difference. First operand has 149 places, 176 transitions, 1630 flow. Second operand 9 states and 169 transitions. [2024-06-27 19:46:35,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 209 transitions, 2154 flow [2024-06-27 19:46:35,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 209 transitions, 2082 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 19:46:35,562 INFO L231 Difference]: Finished difference. Result has 152 places, 179 transitions, 1666 flow [2024-06-27 19:46:35,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1558, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1666, PETRI_PLACES=152, PETRI_TRANSITIONS=179} [2024-06-27 19:46:35,562 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 107 predicate places. [2024-06-27 19:46:35,563 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 179 transitions, 1666 flow [2024-06-27 19:46:35,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:35,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:35,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:35,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 19:46:35,563 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:35,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:35,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1785584278, now seen corresponding path program 8 times [2024-06-27 19:46:35,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:35,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419535971] [2024-06-27 19:46:35,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:35,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:35,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:36,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:36,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:36,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419535971] [2024-06-27 19:46:36,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419535971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:36,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:36,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:46:36,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706665428] [2024-06-27 19:46:36,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:36,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:46:36,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:36,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:46:36,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:46:36,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:46:36,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 179 transitions, 1666 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:36,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:36,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:46:36,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:37,439 INFO L124 PetriNetUnfolderBase]: 3114/4747 cut-off events. [2024-06-27 19:46:37,439 INFO L125 PetriNetUnfolderBase]: For 363219/363219 co-relation queries the response was YES. [2024-06-27 19:46:37,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36601 conditions, 4747 events. 3114/4747 cut-off events. For 363219/363219 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 24791 event pairs, 891 based on Foata normal form. 4/4737 useless extension candidates. Maximal degree in co-relation 36535. Up to 4231 conditions per place. [2024-06-27 19:46:37,475 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 164 selfloop transitions, 42 changer transitions 0/215 dead transitions. [2024-06-27 19:46:37,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 215 transitions, 2378 flow [2024-06-27 19:46:37,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:46:37,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:46:37,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-27 19:46:37,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494949494949495 [2024-06-27 19:46:37,476 INFO L175 Difference]: Start difference. First operand has 152 places, 179 transitions, 1666 flow. Second operand 9 states and 178 transitions. [2024-06-27 19:46:37,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 215 transitions, 2378 flow [2024-06-27 19:46:37,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 215 transitions, 2306 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-27 19:46:37,679 INFO L231 Difference]: Finished difference. Result has 154 places, 182 transitions, 1736 flow [2024-06-27 19:46:37,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1594, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1736, PETRI_PLACES=154, PETRI_TRANSITIONS=182} [2024-06-27 19:46:37,680 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 109 predicate places. [2024-06-27 19:46:37,680 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 182 transitions, 1736 flow [2024-06-27 19:46:37,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:37,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:37,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:37,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 19:46:37,681 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:37,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:37,681 INFO L85 PathProgramCache]: Analyzing trace with hash 93218920, now seen corresponding path program 9 times [2024-06-27 19:46:37,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:37,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715701228] [2024-06-27 19:46:37,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:37,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:37,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:38,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:38,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:38,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715701228] [2024-06-27 19:46:38,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715701228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:38,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:38,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:46:38,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203507057] [2024-06-27 19:46:38,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:38,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:46:38,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:38,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:46:38,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:46:38,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:46:38,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 182 transitions, 1736 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:38,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:38,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:46:38,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:39,537 INFO L124 PetriNetUnfolderBase]: 3136/4779 cut-off events. [2024-06-27 19:46:39,538 INFO L125 PetriNetUnfolderBase]: For 380414/380414 co-relation queries the response was YES. [2024-06-27 19:46:39,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37210 conditions, 4779 events. 3136/4779 cut-off events. For 380414/380414 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 25027 event pairs, 879 based on Foata normal form. 4/4769 useless extension candidates. Maximal degree in co-relation 37143. Up to 4250 conditions per place. [2024-06-27 19:46:39,573 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 160 selfloop transitions, 49 changer transitions 0/218 dead transitions. [2024-06-27 19:46:39,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 218 transitions, 2464 flow [2024-06-27 19:46:39,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:46:39,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:46:39,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-27 19:46:39,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 19:46:39,574 INFO L175 Difference]: Start difference. First operand has 154 places, 182 transitions, 1736 flow. Second operand 9 states and 176 transitions. [2024-06-27 19:46:39,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 218 transitions, 2464 flow [2024-06-27 19:46:39,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 218 transitions, 2313 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-27 19:46:39,789 INFO L231 Difference]: Finished difference. Result has 156 places, 185 transitions, 1747 flow [2024-06-27 19:46:39,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1595, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1747, PETRI_PLACES=156, PETRI_TRANSITIONS=185} [2024-06-27 19:46:39,789 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 111 predicate places. [2024-06-27 19:46:39,789 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 185 transitions, 1747 flow [2024-06-27 19:46:39,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:39,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:39,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:39,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 19:46:39,790 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:39,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:39,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1785346942, now seen corresponding path program 5 times [2024-06-27 19:46:39,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:39,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560779161] [2024-06-27 19:46:39,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:39,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:39,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:40,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:40,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:40,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560779161] [2024-06-27 19:46:40,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560779161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:40,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:40,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:46:40,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110173146] [2024-06-27 19:46:40,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:40,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:46:40,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:40,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:46:40,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:46:40,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:46:40,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 185 transitions, 1747 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:40,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:40,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:46:40,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:41,538 INFO L124 PetriNetUnfolderBase]: 3131/4772 cut-off events. [2024-06-27 19:46:41,539 INFO L125 PetriNetUnfolderBase]: For 392575/392575 co-relation queries the response was YES. [2024-06-27 19:46:41,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37431 conditions, 4772 events. 3131/4772 cut-off events. For 392575/392575 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 25001 event pairs, 906 based on Foata normal form. 2/4760 useless extension candidates. Maximal degree in co-relation 37363. Up to 4487 conditions per place. [2024-06-27 19:46:41,578 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 183 selfloop transitions, 20 changer transitions 0/212 dead transitions. [2024-06-27 19:46:41,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 212 transitions, 2221 flow [2024-06-27 19:46:41,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:46:41,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:46:41,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 19:46:41,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41919191919191917 [2024-06-27 19:46:41,581 INFO L175 Difference]: Start difference. First operand has 156 places, 185 transitions, 1747 flow. Second operand 9 states and 166 transitions. [2024-06-27 19:46:41,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 212 transitions, 2221 flow [2024-06-27 19:46:41,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 212 transitions, 1996 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-27 19:46:41,845 INFO L231 Difference]: Finished difference. Result has 157 places, 185 transitions, 1570 flow [2024-06-27 19:46:41,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1522, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1570, PETRI_PLACES=157, PETRI_TRANSITIONS=185} [2024-06-27 19:46:41,845 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 112 predicate places. [2024-06-27 19:46:41,846 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 185 transitions, 1570 flow [2024-06-27 19:46:41,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:41,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:41,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:41,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 19:46:41,846 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:41,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:41,847 INFO L85 PathProgramCache]: Analyzing trace with hash -822191544, now seen corresponding path program 10 times [2024-06-27 19:46:41,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:41,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791842020] [2024-06-27 19:46:41,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:41,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:41,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:42,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:42,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:42,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791842020] [2024-06-27 19:46:42,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791842020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:42,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:42,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:46:42,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668829443] [2024-06-27 19:46:42,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:42,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:46:42,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:42,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:46:42,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:46:42,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:46:42,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 185 transitions, 1570 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:42,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:42,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:46:42,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:43,624 INFO L124 PetriNetUnfolderBase]: 3121/4758 cut-off events. [2024-06-27 19:46:43,624 INFO L125 PetriNetUnfolderBase]: For 406363/406363 co-relation queries the response was YES. [2024-06-27 19:46:43,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37190 conditions, 4758 events. 3121/4758 cut-off events. For 406363/406363 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 24874 event pairs, 879 based on Foata normal form. 4/4748 useless extension candidates. Maximal degree in co-relation 37121. Up to 4235 conditions per place. [2024-06-27 19:46:43,663 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 160 selfloop transitions, 47 changer transitions 0/216 dead transitions. [2024-06-27 19:46:43,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 216 transitions, 2068 flow [2024-06-27 19:46:43,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:46:43,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:46:43,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-27 19:46:43,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44191919191919193 [2024-06-27 19:46:43,664 INFO L175 Difference]: Start difference. First operand has 157 places, 185 transitions, 1570 flow. Second operand 9 states and 175 transitions. [2024-06-27 19:46:43,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 216 transitions, 2068 flow [2024-06-27 19:46:43,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 216 transitions, 1926 flow, removed 19 selfloop flow, removed 10 redundant places. [2024-06-27 19:46:43,910 INFO L231 Difference]: Finished difference. Result has 156 places, 185 transitions, 1530 flow [2024-06-27 19:46:43,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1428, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1530, PETRI_PLACES=156, PETRI_TRANSITIONS=185} [2024-06-27 19:46:43,911 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 111 predicate places. [2024-06-27 19:46:43,911 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 185 transitions, 1530 flow [2024-06-27 19:46:43,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:43,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:43,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:43,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 19:46:43,911 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:43,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:43,911 INFO L85 PathProgramCache]: Analyzing trace with hash 168268121, now seen corresponding path program 2 times [2024-06-27 19:46:43,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:43,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949674320] [2024-06-27 19:46:43,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:43,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:43,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:44,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:44,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:44,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949674320] [2024-06-27 19:46:44,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949674320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:44,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:44,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:46:44,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401438560] [2024-06-27 19:46:44,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:44,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:46:44,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:44,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:46:44,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:46:44,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 19:46:44,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 185 transitions, 1530 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:44,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:44,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 19:46:44,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:45,246 INFO L124 PetriNetUnfolderBase]: 2977/4623 cut-off events. [2024-06-27 19:46:45,246 INFO L125 PetriNetUnfolderBase]: For 427852/427865 co-relation queries the response was YES. [2024-06-27 19:46:45,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37000 conditions, 4623 events. 2977/4623 cut-off events. For 427852/427865 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 24178 event pairs, 1027 based on Foata normal form. 9/4619 useless extension candidates. Maximal degree in co-relation 36930. Up to 4229 conditions per place. [2024-06-27 19:46:45,345 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 137 selfloop transitions, 11 changer transitions 0/194 dead transitions. [2024-06-27 19:46:45,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 194 transitions, 1848 flow [2024-06-27 19:46:45,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:46:45,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:46:45,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-27 19:46:45,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42803030303030304 [2024-06-27 19:46:45,346 INFO L175 Difference]: Start difference. First operand has 156 places, 185 transitions, 1530 flow. Second operand 6 states and 113 transitions. [2024-06-27 19:46:45,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 194 transitions, 1848 flow [2024-06-27 19:46:45,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 194 transitions, 1712 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-27 19:46:45,717 INFO L231 Difference]: Finished difference. Result has 153 places, 185 transitions, 1422 flow [2024-06-27 19:46:45,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1394, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1422, PETRI_PLACES=153, PETRI_TRANSITIONS=185} [2024-06-27 19:46:45,718 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 108 predicate places. [2024-06-27 19:46:45,718 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 185 transitions, 1422 flow [2024-06-27 19:46:45,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:45,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:45,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:45,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 19:46:45,718 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:45,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:45,719 INFO L85 PathProgramCache]: Analyzing trace with hash 161609817, now seen corresponding path program 1 times [2024-06-27 19:46:45,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:45,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114376031] [2024-06-27 19:46:45,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:45,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:45,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:46,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:46,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:46,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114376031] [2024-06-27 19:46:46,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114376031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:46,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:46,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:46:46,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355356780] [2024-06-27 19:46:46,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:46,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:46:46,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:46,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:46:46,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:46:46,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 19:46:46,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 185 transitions, 1422 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:46,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:46,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 19:46:46,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:47,235 INFO L124 PetriNetUnfolderBase]: 3380/5028 cut-off events. [2024-06-27 19:46:47,235 INFO L125 PetriNetUnfolderBase]: For 446139/446152 co-relation queries the response was YES. [2024-06-27 19:46:47,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39257 conditions, 5028 events. 3380/5028 cut-off events. For 446139/446152 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 24717 event pairs, 1077 based on Foata normal form. 9/4999 useless extension candidates. Maximal degree in co-relation 39186. Up to 4877 conditions per place. [2024-06-27 19:46:47,281 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 174 selfloop transitions, 16 changer transitions 0/204 dead transitions. [2024-06-27 19:46:47,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 204 transitions, 1996 flow [2024-06-27 19:46:47,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:46:47,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:46:47,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-27 19:46:47,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4128787878787879 [2024-06-27 19:46:47,282 INFO L175 Difference]: Start difference. First operand has 153 places, 185 transitions, 1422 flow. Second operand 6 states and 109 transitions. [2024-06-27 19:46:47,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 204 transitions, 1996 flow [2024-06-27 19:46:47,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 204 transitions, 1962 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 19:46:47,662 INFO L231 Difference]: Finished difference. Result has 154 places, 191 transitions, 1500 flow [2024-06-27 19:46:47,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1388, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1500, PETRI_PLACES=154, PETRI_TRANSITIONS=191} [2024-06-27 19:46:47,663 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 109 predicate places. [2024-06-27 19:46:47,663 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 191 transitions, 1500 flow [2024-06-27 19:46:47,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:47,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:47,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:47,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 19:46:47,663 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:47,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:47,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1684935867, now seen corresponding path program 2 times [2024-06-27 19:46:47,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:47,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292386339] [2024-06-27 19:46:47,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:47,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:47,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:48,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:48,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:48,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292386339] [2024-06-27 19:46:48,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292386339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:48,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:48,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:46:48,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613081020] [2024-06-27 19:46:48,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:48,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:46:48,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:48,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:46:48,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:46:48,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 19:46:48,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 191 transitions, 1500 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:48,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:48,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 19:46:48,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:49,185 INFO L124 PetriNetUnfolderBase]: 3377/5025 cut-off events. [2024-06-27 19:46:49,185 INFO L125 PetriNetUnfolderBase]: For 464166/464182 co-relation queries the response was YES. [2024-06-27 19:46:49,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39989 conditions, 5025 events. 3377/5025 cut-off events. For 464166/464182 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 24697 event pairs, 1080 based on Foata normal form. 11/4997 useless extension candidates. Maximal degree in co-relation 39917. Up to 4874 conditions per place. [2024-06-27 19:46:49,219 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 170 selfloop transitions, 16 changer transitions 0/200 dead transitions. [2024-06-27 19:46:49,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 200 transitions, 1894 flow [2024-06-27 19:46:49,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:46:49,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:46:49,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-27 19:46:49,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2024-06-27 19:46:49,220 INFO L175 Difference]: Start difference. First operand has 154 places, 191 transitions, 1500 flow. Second operand 6 states and 105 transitions. [2024-06-27 19:46:49,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 200 transitions, 1894 flow [2024-06-27 19:46:49,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 200 transitions, 1842 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-27 19:46:49,699 INFO L231 Difference]: Finished difference. Result has 158 places, 191 transitions, 1486 flow [2024-06-27 19:46:49,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1448, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1486, PETRI_PLACES=158, PETRI_TRANSITIONS=191} [2024-06-27 19:46:49,700 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 113 predicate places. [2024-06-27 19:46:49,700 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 191 transitions, 1486 flow [2024-06-27 19:46:49,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:49,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:49,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:49,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 19:46:49,700 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:49,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:49,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1519788625, now seen corresponding path program 1 times [2024-06-27 19:46:49,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:49,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619266681] [2024-06-27 19:46:49,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:49,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:49,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:50,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:50,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:50,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619266681] [2024-06-27 19:46:50,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619266681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:50,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:50,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:46:50,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15499548] [2024-06-27 19:46:50,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:50,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:46:50,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:50,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:46:50,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:46:51,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:46:51,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 191 transitions, 1486 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:51,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:51,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:46:51,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:52,168 INFO L124 PetriNetUnfolderBase]: 3157/4799 cut-off events. [2024-06-27 19:46:52,169 INFO L125 PetriNetUnfolderBase]: For 471728/471728 co-relation queries the response was YES. [2024-06-27 19:46:52,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39055 conditions, 4799 events. 3157/4799 cut-off events. For 471728/471728 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 24969 event pairs, 897 based on Foata normal form. 2/4787 useless extension candidates. Maximal degree in co-relation 38981. Up to 4455 conditions per place. [2024-06-27 19:46:52,211 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 207 selfloop transitions, 26 changer transitions 0/244 dead transitions. [2024-06-27 19:46:52,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 244 transitions, 2138 flow [2024-06-27 19:46:52,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:46:52,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:46:52,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2024-06-27 19:46:52,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44421487603305787 [2024-06-27 19:46:52,212 INFO L175 Difference]: Start difference. First operand has 158 places, 191 transitions, 1486 flow. Second operand 11 states and 215 transitions. [2024-06-27 19:46:52,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 244 transitions, 2138 flow [2024-06-27 19:46:52,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 244 transitions, 2090 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 19:46:52,635 INFO L231 Difference]: Finished difference. Result has 164 places, 194 transitions, 1563 flow [2024-06-27 19:46:52,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1438, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1563, PETRI_PLACES=164, PETRI_TRANSITIONS=194} [2024-06-27 19:46:52,636 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 119 predicate places. [2024-06-27 19:46:52,636 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 194 transitions, 1563 flow [2024-06-27 19:46:52,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:52,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:52,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:52,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 19:46:52,636 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:52,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:52,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1601640192, now seen corresponding path program 1 times [2024-06-27 19:46:52,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:52,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916058605] [2024-06-27 19:46:52,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:52,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:52,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:53,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:53,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:53,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916058605] [2024-06-27 19:46:53,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916058605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:53,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:53,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:46:53,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288427026] [2024-06-27 19:46:53,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:53,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:46:53,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:53,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:46:53,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:46:53,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:46:53,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 194 transitions, 1563 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:53,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:53,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:46:53,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:54,805 INFO L124 PetriNetUnfolderBase]: 3197/4858 cut-off events. [2024-06-27 19:46:54,805 INFO L125 PetriNetUnfolderBase]: For 497703/497703 co-relation queries the response was YES. [2024-06-27 19:46:54,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40388 conditions, 4858 events. 3197/4858 cut-off events. For 497703/497703 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 25437 event pairs, 878 based on Foata normal form. 4/4846 useless extension candidates. Maximal degree in co-relation 40313. Up to 4529 conditions per place. [2024-06-27 19:46:54,849 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 207 selfloop transitions, 23 changer transitions 0/241 dead transitions. [2024-06-27 19:46:54,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 241 transitions, 2197 flow [2024-06-27 19:46:54,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:46:54,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:46:54,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-27 19:46:54,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44545454545454544 [2024-06-27 19:46:54,851 INFO L175 Difference]: Start difference. First operand has 164 places, 194 transitions, 1563 flow. Second operand 10 states and 196 transitions. [2024-06-27 19:46:54,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 241 transitions, 2197 flow [2024-06-27 19:46:55,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 241 transitions, 2098 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-27 19:46:55,343 INFO L231 Difference]: Finished difference. Result has 165 places, 197 transitions, 1584 flow [2024-06-27 19:46:55,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1464, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1584, PETRI_PLACES=165, PETRI_TRANSITIONS=197} [2024-06-27 19:46:55,343 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 120 predicate places. [2024-06-27 19:46:55,343 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 197 transitions, 1584 flow [2024-06-27 19:46:55,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:55,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:55,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:55,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 19:46:55,344 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:55,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:55,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1658163170, now seen corresponding path program 2 times [2024-06-27 19:46:55,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:55,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3089825] [2024-06-27 19:46:55,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:55,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:55,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:56,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:56,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:56,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3089825] [2024-06-27 19:46:56,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3089825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:56,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:56,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:46:56,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263520469] [2024-06-27 19:46:56,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:56,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:46:56,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:56,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:46:56,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:46:56,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:46:56,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 197 transitions, 1584 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:56,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:56,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:46:56,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:57,416 INFO L124 PetriNetUnfolderBase]: 3274/4973 cut-off events. [2024-06-27 19:46:57,416 INFO L125 PetriNetUnfolderBase]: For 526659/526662 co-relation queries the response was YES. [2024-06-27 19:46:57,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42179 conditions, 4973 events. 3274/4973 cut-off events. For 526659/526662 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 26104 event pairs, 757 based on Foata normal form. 4/4963 useless extension candidates. Maximal degree in co-relation 42103. Up to 3875 conditions per place. [2024-06-27 19:46:57,458 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 134 selfloop transitions, 110 changer transitions 0/255 dead transitions. [2024-06-27 19:46:57,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 255 transitions, 2784 flow [2024-06-27 19:46:57,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:46:57,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:46:57,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-27 19:46:57,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4818181818181818 [2024-06-27 19:46:57,460 INFO L175 Difference]: Start difference. First operand has 165 places, 197 transitions, 1584 flow. Second operand 10 states and 212 transitions. [2024-06-27 19:46:57,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 255 transitions, 2784 flow [2024-06-27 19:46:57,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 255 transitions, 2688 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-27 19:46:57,815 INFO L231 Difference]: Finished difference. Result has 167 places, 206 transitions, 1920 flow [2024-06-27 19:46:57,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1488, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1920, PETRI_PLACES=167, PETRI_TRANSITIONS=206} [2024-06-27 19:46:57,815 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 122 predicate places. [2024-06-27 19:46:57,816 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 206 transitions, 1920 flow [2024-06-27 19:46:57,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:57,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:57,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:57,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 19:46:57,816 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:57,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:57,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1599915526, now seen corresponding path program 3 times [2024-06-27 19:46:57,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:57,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372293673] [2024-06-27 19:46:57,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:57,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:57,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:58,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:58,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:58,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372293673] [2024-06-27 19:46:58,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372293673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:58,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:58,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:46:58,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742561861] [2024-06-27 19:46:58,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:58,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:46:58,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:58,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:46:58,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:46:58,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:46:59,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 206 transitions, 1920 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:59,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:59,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:46:59,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:59,812 INFO L124 PetriNetUnfolderBase]: 3264/4959 cut-off events. [2024-06-27 19:46:59,812 INFO L125 PetriNetUnfolderBase]: For 545544/545547 co-relation queries the response was YES. [2024-06-27 19:46:59,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43010 conditions, 4959 events. 3264/4959 cut-off events. For 545544/545547 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 26074 event pairs, 755 based on Foata normal form. 4/4949 useless extension candidates. Maximal degree in co-relation 42933. Up to 3867 conditions per place. [2024-06-27 19:46:59,856 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 134 selfloop transitions, 109 changer transitions 0/254 dead transitions. [2024-06-27 19:46:59,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 254 transitions, 2732 flow [2024-06-27 19:46:59,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:46:59,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:46:59,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-27 19:46:59,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4818181818181818 [2024-06-27 19:46:59,857 INFO L175 Difference]: Start difference. First operand has 167 places, 206 transitions, 1920 flow. Second operand 10 states and 212 transitions. [2024-06-27 19:46:59,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 254 transitions, 2732 flow [2024-06-27 19:47:00,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 254 transitions, 2533 flow, removed 61 selfloop flow, removed 5 redundant places. [2024-06-27 19:47:00,455 INFO L231 Difference]: Finished difference. Result has 172 places, 206 transitions, 1947 flow [2024-06-27 19:47:00,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1721, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1947, PETRI_PLACES=172, PETRI_TRANSITIONS=206} [2024-06-27 19:47:00,455 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 127 predicate places. [2024-06-27 19:47:00,455 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 206 transitions, 1947 flow [2024-06-27 19:47:00,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:00,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:00,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:00,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 19:47:00,456 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:00,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:00,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1658168905, now seen corresponding path program 2 times [2024-06-27 19:47:00,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:00,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468148648] [2024-06-27 19:47:00,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:00,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:00,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:01,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:01,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:01,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468148648] [2024-06-27 19:47:01,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468148648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:01,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:01,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:47:01,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198560478] [2024-06-27 19:47:01,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:01,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:47:01,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:01,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:47:01,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:47:01,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:47:01,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 206 transitions, 1947 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:01,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:01,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:47:01,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:02,716 INFO L124 PetriNetUnfolderBase]: 3273/4974 cut-off events. [2024-06-27 19:47:02,716 INFO L125 PetriNetUnfolderBase]: For 561672/561675 co-relation queries the response was YES. [2024-06-27 19:47:02,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43684 conditions, 4974 events. 3273/4974 cut-off events. For 561672/561675 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 26181 event pairs, 872 based on Foata normal form. 4/4967 useless extension candidates. Maximal degree in co-relation 43605. Up to 4520 conditions per place. [2024-06-27 19:47:02,757 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 180 selfloop transitions, 58 changer transitions 0/249 dead transitions. [2024-06-27 19:47:02,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 249 transitions, 2593 flow [2024-06-27 19:47:02,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:47:02,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:47:02,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-27 19:47:02,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 19:47:02,758 INFO L175 Difference]: Start difference. First operand has 172 places, 206 transitions, 1947 flow. Second operand 10 states and 198 transitions. [2024-06-27 19:47:02,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 249 transitions, 2593 flow [2024-06-27 19:47:03,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 249 transitions, 2357 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-27 19:47:03,260 INFO L231 Difference]: Finished difference. Result has 173 places, 209 transitions, 1909 flow [2024-06-27 19:47:03,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1711, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1909, PETRI_PLACES=173, PETRI_TRANSITIONS=209} [2024-06-27 19:47:03,260 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 128 predicate places. [2024-06-27 19:47:03,260 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 209 transitions, 1909 flow [2024-06-27 19:47:03,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:03,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:03,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:03,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 19:47:03,260 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:03,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:03,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1595926272, now seen corresponding path program 4 times [2024-06-27 19:47:03,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:03,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532473269] [2024-06-27 19:47:03,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:03,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:03,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:04,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:04,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:04,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532473269] [2024-06-27 19:47:04,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532473269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:04,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:04,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:47:04,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373952413] [2024-06-27 19:47:04,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:04,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:47:04,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:04,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:47:04,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:47:04,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:47:04,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 209 transitions, 1909 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:04,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:04,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:47:04,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:05,297 INFO L124 PetriNetUnfolderBase]: 3308/5027 cut-off events. [2024-06-27 19:47:05,298 INFO L125 PetriNetUnfolderBase]: For 589125/589128 co-relation queries the response was YES. [2024-06-27 19:47:05,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44510 conditions, 5027 events. 3308/5027 cut-off events. For 589125/589128 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 26474 event pairs, 820 based on Foata normal form. 4/5016 useless extension candidates. Maximal degree in co-relation 44430. Up to 3911 conditions per place. [2024-06-27 19:47:05,339 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 139 selfloop transitions, 111 changer transitions 0/261 dead transitions. [2024-06-27 19:47:05,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 261 transitions, 3059 flow [2024-06-27 19:47:05,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:47:05,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:47:05,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-27 19:47:05,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-27 19:47:05,340 INFO L175 Difference]: Start difference. First operand has 173 places, 209 transitions, 1909 flow. Second operand 10 states and 210 transitions. [2024-06-27 19:47:05,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 261 transitions, 3059 flow [2024-06-27 19:47:05,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 261 transitions, 2885 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-27 19:47:05,701 INFO L231 Difference]: Finished difference. Result has 175 places, 215 transitions, 2085 flow [2024-06-27 19:47:05,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1735, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2085, PETRI_PLACES=175, PETRI_TRANSITIONS=215} [2024-06-27 19:47:05,701 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 130 predicate places. [2024-06-27 19:47:05,701 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 215 transitions, 2085 flow [2024-06-27 19:47:05,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:05,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:05,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:05,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 19:47:05,702 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:05,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:05,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1514278375, now seen corresponding path program 3 times [2024-06-27 19:47:05,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:05,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036267860] [2024-06-27 19:47:05,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:05,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:05,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:06,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:06,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:06,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036267860] [2024-06-27 19:47:06,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036267860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:06,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:06,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:47:06,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542239108] [2024-06-27 19:47:06,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:06,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:47:06,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:06,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:47:06,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:47:07,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:47:07,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 215 transitions, 2085 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:07,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:07,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:47:07,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:08,037 INFO L124 PetriNetUnfolderBase]: 3338/5073 cut-off events. [2024-06-27 19:47:08,037 INFO L125 PetriNetUnfolderBase]: For 611082/611085 co-relation queries the response was YES. [2024-06-27 19:47:08,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45630 conditions, 5073 events. 3338/5073 cut-off events. For 611082/611085 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 26804 event pairs, 879 based on Foata normal form. 4/5061 useless extension candidates. Maximal degree in co-relation 45549. Up to 4614 conditions per place. [2024-06-27 19:47:08,087 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 188 selfloop transitions, 56 changer transitions 0/255 dead transitions. [2024-06-27 19:47:08,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 255 transitions, 2741 flow [2024-06-27 19:47:08,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:47:08,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:47:08,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-27 19:47:08,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44545454545454544 [2024-06-27 19:47:08,088 INFO L175 Difference]: Start difference. First operand has 175 places, 215 transitions, 2085 flow. Second operand 10 states and 196 transitions. [2024-06-27 19:47:08,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 255 transitions, 2741 flow [2024-06-27 19:47:08,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 255 transitions, 2543 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-27 19:47:08,567 INFO L231 Difference]: Finished difference. Result has 179 places, 218 transitions, 2087 flow [2024-06-27 19:47:08,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1887, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2087, PETRI_PLACES=179, PETRI_TRANSITIONS=218} [2024-06-27 19:47:08,567 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 134 predicate places. [2024-06-27 19:47:08,568 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 218 transitions, 2087 flow [2024-06-27 19:47:08,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:08,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:08,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:08,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 19:47:08,568 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:08,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:08,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1514278220, now seen corresponding path program 5 times [2024-06-27 19:47:08,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:08,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472920540] [2024-06-27 19:47:08,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:08,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:08,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:09,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:09,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:09,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472920540] [2024-06-27 19:47:09,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472920540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:09,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:09,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:47:09,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048080042] [2024-06-27 19:47:09,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:09,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:47:09,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:09,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:47:09,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:47:09,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:47:09,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 218 transitions, 2087 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:09,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:09,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:47:09,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:10,655 INFO L124 PetriNetUnfolderBase]: 3362/5106 cut-off events. [2024-06-27 19:47:10,655 INFO L125 PetriNetUnfolderBase]: For 636643/636646 co-relation queries the response was YES. [2024-06-27 19:47:10,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46239 conditions, 5106 events. 3362/5106 cut-off events. For 636643/636646 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 26925 event pairs, 792 based on Foata normal form. 4/5096 useless extension candidates. Maximal degree in co-relation 46157. Up to 3964 conditions per place. [2024-06-27 19:47:10,704 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 145 selfloop transitions, 112 changer transitions 0/268 dead transitions. [2024-06-27 19:47:10,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 268 transitions, 3208 flow [2024-06-27 19:47:10,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:47:10,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:47:10,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-27 19:47:10,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4818181818181818 [2024-06-27 19:47:10,705 INFO L175 Difference]: Start difference. First operand has 179 places, 218 transitions, 2087 flow. Second operand 10 states and 212 transitions. [2024-06-27 19:47:10,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 268 transitions, 3208 flow [2024-06-27 19:47:11,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 268 transitions, 3032 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-27 19:47:11,332 INFO L231 Difference]: Finished difference. Result has 181 places, 221 transitions, 2200 flow [2024-06-27 19:47:11,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1911, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2200, PETRI_PLACES=181, PETRI_TRANSITIONS=221} [2024-06-27 19:47:11,332 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 136 predicate places. [2024-06-27 19:47:11,333 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 221 transitions, 2200 flow [2024-06-27 19:47:11,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:11,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:11,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:11,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 19:47:11,333 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:11,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:11,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1514272640, now seen corresponding path program 6 times [2024-06-27 19:47:11,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:11,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274253882] [2024-06-27 19:47:11,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:11,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:11,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:12,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:12,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:12,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274253882] [2024-06-27 19:47:12,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274253882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:12,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:12,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:47:12,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351634187] [2024-06-27 19:47:12,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:12,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:47:12,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:12,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:47:12,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:47:12,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:47:12,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 221 transitions, 2200 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:12,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:12,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:47:12,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:13,464 INFO L124 PetriNetUnfolderBase]: 3352/5092 cut-off events. [2024-06-27 19:47:13,465 INFO L125 PetriNetUnfolderBase]: For 652843/652846 co-relation queries the response was YES. [2024-06-27 19:47:13,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46592 conditions, 5092 events. 3352/5092 cut-off events. For 652843/652846 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 26947 event pairs, 770 based on Foata normal form. 4/5082 useless extension candidates. Maximal degree in co-relation 46509. Up to 3956 conditions per place. [2024-06-27 19:47:13,515 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 144 selfloop transitions, 111 changer transitions 0/266 dead transitions. [2024-06-27 19:47:13,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 266 transitions, 3048 flow [2024-06-27 19:47:13,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:47:13,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:47:13,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-27 19:47:13,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47954545454545455 [2024-06-27 19:47:13,517 INFO L175 Difference]: Start difference. First operand has 181 places, 221 transitions, 2200 flow. Second operand 10 states and 211 transitions. [2024-06-27 19:47:13,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 266 transitions, 3048 flow [2024-06-27 19:47:14,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 266 transitions, 2756 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-27 19:47:14,164 INFO L231 Difference]: Finished difference. Result has 184 places, 221 transitions, 2138 flow [2024-06-27 19:47:14,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1908, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2138, PETRI_PLACES=184, PETRI_TRANSITIONS=221} [2024-06-27 19:47:14,165 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 139 predicate places. [2024-06-27 19:47:14,165 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 221 transitions, 2138 flow [2024-06-27 19:47:14,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:14,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:14,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:14,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 19:47:14,165 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:14,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:14,166 INFO L85 PathProgramCache]: Analyzing trace with hash 478128407, now seen corresponding path program 1 times [2024-06-27 19:47:14,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:14,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489634170] [2024-06-27 19:47:14,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:14,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:14,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:14,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:14,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:14,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489634170] [2024-06-27 19:47:14,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489634170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:14,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:14,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:47:14,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221880609] [2024-06-27 19:47:14,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:14,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:47:14,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:14,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:47:14,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:47:14,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:47:14,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 221 transitions, 2138 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:14,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:14,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:47:14,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:15,759 INFO L124 PetriNetUnfolderBase]: 3475/5254 cut-off events. [2024-06-27 19:47:15,759 INFO L125 PetriNetUnfolderBase]: For 680133/680149 co-relation queries the response was YES. [2024-06-27 19:47:15,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47467 conditions, 5254 events. 3475/5254 cut-off events. For 680133/680149 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 26831 event pairs, 1070 based on Foata normal form. 5/5223 useless extension candidates. Maximal degree in co-relation 47383. Up to 4872 conditions per place. [2024-06-27 19:47:15,810 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 186 selfloop transitions, 24 changer transitions 0/250 dead transitions. [2024-06-27 19:47:15,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 250 transitions, 2804 flow [2024-06-27 19:47:15,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:47:15,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:47:15,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-27 19:47:15,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44805194805194803 [2024-06-27 19:47:15,812 INFO L175 Difference]: Start difference. First operand has 184 places, 221 transitions, 2138 flow. Second operand 7 states and 138 transitions. [2024-06-27 19:47:15,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 250 transitions, 2804 flow [2024-06-27 19:47:16,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 250 transitions, 2546 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-27 19:47:16,426 INFO L231 Difference]: Finished difference. Result has 181 places, 227 transitions, 2012 flow [2024-06-27 19:47:16,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1880, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2012, PETRI_PLACES=181, PETRI_TRANSITIONS=227} [2024-06-27 19:47:16,426 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 136 predicate places. [2024-06-27 19:47:16,426 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 227 transitions, 2012 flow [2024-06-27 19:47:16,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:16,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:16,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:16,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 19:47:16,427 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:16,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:16,427 INFO L85 PathProgramCache]: Analyzing trace with hash -454701696, now seen corresponding path program 7 times [2024-06-27 19:47:16,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:16,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576737261] [2024-06-27 19:47:16,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:16,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:16,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:17,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:17,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:17,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576737261] [2024-06-27 19:47:17,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576737261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:17,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:17,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:47:17,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662862625] [2024-06-27 19:47:17,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:17,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:47:17,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:17,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:47:17,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:47:17,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:47:17,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 227 transitions, 2012 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:17,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:17,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:47:17,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:18,571 INFO L124 PetriNetUnfolderBase]: 3441/5220 cut-off events. [2024-06-27 19:47:18,571 INFO L125 PetriNetUnfolderBase]: For 710699/710714 co-relation queries the response was YES. [2024-06-27 19:47:18,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48241 conditions, 5220 events. 3441/5220 cut-off events. For 710699/710714 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 27613 event pairs, 814 based on Foata normal form. 4/5206 useless extension candidates. Maximal degree in co-relation 48156. Up to 4045 conditions per place. [2024-06-27 19:47:18,619 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 144 selfloop transitions, 119 changer transitions 0/276 dead transitions. [2024-06-27 19:47:18,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 276 transitions, 3222 flow [2024-06-27 19:47:18,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:47:18,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:47:18,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-06-27 19:47:18,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4727272727272727 [2024-06-27 19:47:18,620 INFO L175 Difference]: Start difference. First operand has 181 places, 227 transitions, 2012 flow. Second operand 10 states and 208 transitions. [2024-06-27 19:47:18,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 276 transitions, 3222 flow [2024-06-27 19:47:19,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 276 transitions, 3168 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 19:47:19,045 INFO L231 Difference]: Finished difference. Result has 188 places, 233 transitions, 2330 flow [2024-06-27 19:47:19,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1958, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2330, PETRI_PLACES=188, PETRI_TRANSITIONS=233} [2024-06-27 19:47:19,046 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 143 predicate places. [2024-06-27 19:47:19,046 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 233 transitions, 2330 flow [2024-06-27 19:47:19,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:19,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:19,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:19,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 19:47:19,047 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:19,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:19,047 INFO L85 PathProgramCache]: Analyzing trace with hash -454424649, now seen corresponding path program 1 times [2024-06-27 19:47:19,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:19,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132147401] [2024-06-27 19:47:19,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:19,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:19,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:20,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:20,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:20,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132147401] [2024-06-27 19:47:20,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132147401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:20,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:20,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:47:20,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50370481] [2024-06-27 19:47:20,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:20,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:47:20,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:20,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:47:20,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:47:20,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:47:20,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 233 transitions, 2330 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:20,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:20,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:47:20,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:21,351 INFO L124 PetriNetUnfolderBase]: 3577/5390 cut-off events. [2024-06-27 19:47:21,352 INFO L125 PetriNetUnfolderBase]: For 777369/777394 co-relation queries the response was YES. [2024-06-27 19:47:21,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51110 conditions, 5390 events. 3577/5390 cut-off events. For 777369/777394 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 27853 event pairs, 973 based on Foata normal form. 14/5354 useless extension candidates. Maximal degree in co-relation 51023. Up to 4896 conditions per place. [2024-06-27 19:47:21,403 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 212 selfloop transitions, 36 changer transitions 0/272 dead transitions. [2024-06-27 19:47:21,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 272 transitions, 3000 flow [2024-06-27 19:47:21,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:47:21,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:47:21,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-27 19:47:21,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44696969696969696 [2024-06-27 19:47:21,404 INFO L175 Difference]: Start difference. First operand has 188 places, 233 transitions, 2330 flow. Second operand 9 states and 177 transitions. [2024-06-27 19:47:21,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 272 transitions, 3000 flow [2024-06-27 19:47:21,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 272 transitions, 2799 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-27 19:47:21,899 INFO L231 Difference]: Finished difference. Result has 192 places, 238 transitions, 2302 flow [2024-06-27 19:47:21,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2131, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2302, PETRI_PLACES=192, PETRI_TRANSITIONS=238} [2024-06-27 19:47:21,899 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 147 predicate places. [2024-06-27 19:47:21,899 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 238 transitions, 2302 flow [2024-06-27 19:47:21,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:21,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:21,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:21,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 19:47:21,900 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:21,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:21,900 INFO L85 PathProgramCache]: Analyzing trace with hash 214408214, now seen corresponding path program 8 times [2024-06-27 19:47:21,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:21,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241290647] [2024-06-27 19:47:21,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:21,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:21,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:22,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:22,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:22,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241290647] [2024-06-27 19:47:22,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241290647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:22,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:22,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:47:22,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950105736] [2024-06-27 19:47:22,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:22,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:47:22,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:22,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:47:22,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:47:23,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:47:23,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 238 transitions, 2302 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:23,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:23,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:47:23,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:23,996 INFO L124 PetriNetUnfolderBase]: 3531/5359 cut-off events. [2024-06-27 19:47:23,996 INFO L125 PetriNetUnfolderBase]: For 768843/768858 co-relation queries the response was YES. [2024-06-27 19:47:24,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50506 conditions, 5359 events. 3531/5359 cut-off events. For 768843/768858 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 28503 event pairs, 826 based on Foata normal form. 4/5345 useless extension candidates. Maximal degree in co-relation 50417. Up to 4121 conditions per place. [2024-06-27 19:47:24,048 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 154 selfloop transitions, 122 changer transitions 0/290 dead transitions. [2024-06-27 19:47:24,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 290 transitions, 3786 flow [2024-06-27 19:47:24,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:47:24,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:47:24,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 213 transitions. [2024-06-27 19:47:24,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48409090909090907 [2024-06-27 19:47:24,050 INFO L175 Difference]: Start difference. First operand has 192 places, 238 transitions, 2302 flow. Second operand 10 states and 213 transitions. [2024-06-27 19:47:24,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 290 transitions, 3786 flow [2024-06-27 19:47:24,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 290 transitions, 3661 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-27 19:47:24,555 INFO L231 Difference]: Finished difference. Result has 196 places, 244 transitions, 2549 flow [2024-06-27 19:47:24,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2177, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2549, PETRI_PLACES=196, PETRI_TRANSITIONS=244} [2024-06-27 19:47:24,556 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 151 predicate places. [2024-06-27 19:47:24,556 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 244 transitions, 2549 flow [2024-06-27 19:47:24,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:24,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:24,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:24,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 19:47:24,557 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:24,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:24,557 INFO L85 PathProgramCache]: Analyzing trace with hash -462059081, now seen corresponding path program 4 times [2024-06-27 19:47:24,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:24,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082546732] [2024-06-27 19:47:24,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:24,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:24,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:25,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:25,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:25,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082546732] [2024-06-27 19:47:25,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082546732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:25,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:25,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:47:25,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392434679] [2024-06-27 19:47:25,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:25,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:47:25,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:25,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:47:25,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:47:25,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:47:25,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 244 transitions, 2549 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:25,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:25,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:47:25,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:26,817 INFO L124 PetriNetUnfolderBase]: 3519/5341 cut-off events. [2024-06-27 19:47:26,817 INFO L125 PetriNetUnfolderBase]: For 792570/792585 co-relation queries the response was YES. [2024-06-27 19:47:26,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51246 conditions, 5341 events. 3519/5341 cut-off events. For 792570/792585 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 28501 event pairs, 959 based on Foata normal form. 4/5329 useless extension candidates. Maximal degree in co-relation 51156. Up to 4873 conditions per place. [2024-06-27 19:47:26,873 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 212 selfloop transitions, 55 changer transitions 0/281 dead transitions. [2024-06-27 19:47:26,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 281 transitions, 3251 flow [2024-06-27 19:47:26,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:47:26,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:47:26,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-27 19:47:26,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409090909090909 [2024-06-27 19:47:26,875 INFO L175 Difference]: Start difference. First operand has 196 places, 244 transitions, 2549 flow. Second operand 10 states and 194 transitions. [2024-06-27 19:47:26,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 281 transitions, 3251 flow [2024-06-27 19:47:27,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 281 transitions, 2995 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-27 19:47:27,448 INFO L231 Difference]: Finished difference. Result has 200 places, 247 transitions, 2499 flow [2024-06-27 19:47:27,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2293, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2499, PETRI_PLACES=200, PETRI_TRANSITIONS=247} [2024-06-27 19:47:27,448 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 155 predicate places. [2024-06-27 19:47:27,448 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 247 transitions, 2499 flow [2024-06-27 19:47:27,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:27,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:27,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:27,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 19:47:27,449 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:27,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:27,449 INFO L85 PathProgramCache]: Analyzing trace with hash -462058926, now seen corresponding path program 9 times [2024-06-27 19:47:27,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:27,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459058218] [2024-06-27 19:47:27,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:27,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:27,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:28,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:28,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:28,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459058218] [2024-06-27 19:47:28,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459058218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:28,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:28,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:47:28,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57188830] [2024-06-27 19:47:28,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:28,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:47:28,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:28,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:47:28,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:47:28,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:47:28,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 247 transitions, 2499 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:28,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:28,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:47:28,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:29,540 INFO L124 PetriNetUnfolderBase]: 3509/5326 cut-off events. [2024-06-27 19:47:29,541 INFO L125 PetriNetUnfolderBase]: For 813674/813689 co-relation queries the response was YES. [2024-06-27 19:47:29,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51248 conditions, 5326 events. 3509/5326 cut-off events. For 813674/813689 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 28392 event pairs, 870 based on Foata normal form. 4/5311 useless extension candidates. Maximal degree in co-relation 51157. Up to 4118 conditions per place. [2024-06-27 19:47:29,596 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 153 selfloop transitions, 124 changer transitions 0/291 dead transitions. [2024-06-27 19:47:29,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 291 transitions, 3647 flow [2024-06-27 19:47:29,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:47:29,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:47:29,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-27 19:47:29,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-27 19:47:29,598 INFO L175 Difference]: Start difference. First operand has 200 places, 247 transitions, 2499 flow. Second operand 10 states and 210 transitions. [2024-06-27 19:47:29,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 291 transitions, 3647 flow [2024-06-27 19:47:30,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 291 transitions, 3427 flow, removed 57 selfloop flow, removed 8 redundant places. [2024-06-27 19:47:30,120 INFO L231 Difference]: Finished difference. Result has 202 places, 247 transitions, 2535 flow [2024-06-27 19:47:30,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2279, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2535, PETRI_PLACES=202, PETRI_TRANSITIONS=247} [2024-06-27 19:47:30,120 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 157 predicate places. [2024-06-27 19:47:30,120 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 247 transitions, 2535 flow [2024-06-27 19:47:30,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:30,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:30,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:30,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 19:47:30,121 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:30,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:30,121 INFO L85 PathProgramCache]: Analyzing trace with hash -461851536, now seen corresponding path program 10 times [2024-06-27 19:47:30,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:30,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202000069] [2024-06-27 19:47:30,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:30,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:30,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:31,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:31,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:31,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202000069] [2024-06-27 19:47:31,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202000069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:31,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:31,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:47:31,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959942842] [2024-06-27 19:47:31,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:31,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:47:31,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:31,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:47:31,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:47:31,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:47:31,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 247 transitions, 2535 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:31,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:31,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:47:31,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:32,293 INFO L124 PetriNetUnfolderBase]: 3499/5312 cut-off events. [2024-06-27 19:47:32,293 INFO L125 PetriNetUnfolderBase]: For 830480/830495 co-relation queries the response was YES. [2024-06-27 19:47:32,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51541 conditions, 5312 events. 3499/5312 cut-off events. For 830480/830495 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 28297 event pairs, 885 based on Foata normal form. 4/5297 useless extension candidates. Maximal degree in co-relation 51449. Up to 4110 conditions per place. [2024-06-27 19:47:32,347 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 154 selfloop transitions, 121 changer transitions 0/289 dead transitions. [2024-06-27 19:47:32,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 289 transitions, 3441 flow [2024-06-27 19:47:32,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:47:32,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:47:32,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-27 19:47:32,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-27 19:47:32,348 INFO L175 Difference]: Start difference. First operand has 202 places, 247 transitions, 2535 flow. Second operand 10 states and 210 transitions. [2024-06-27 19:47:32,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 289 transitions, 3441 flow [2024-06-27 19:47:33,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 289 transitions, 3159 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-27 19:47:33,076 INFO L231 Difference]: Finished difference. Result has 204 places, 247 transitions, 2503 flow [2024-06-27 19:47:33,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2253, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2503, PETRI_PLACES=204, PETRI_TRANSITIONS=247} [2024-06-27 19:47:33,076 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 159 predicate places. [2024-06-27 19:47:33,076 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 247 transitions, 2503 flow [2024-06-27 19:47:33,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:33,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:33,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:33,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 19:47:33,077 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:33,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:33,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1135582637, now seen corresponding path program 2 times [2024-06-27 19:47:33,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:33,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511040626] [2024-06-27 19:47:33,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:33,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:33,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:33,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:33,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:33,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511040626] [2024-06-27 19:47:33,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511040626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:33,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:33,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:47:33,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842909216] [2024-06-27 19:47:33,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:33,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:47:33,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:33,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:47:33,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:47:33,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:47:33,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 247 transitions, 2503 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:33,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:33,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:47:33,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:34,770 INFO L124 PetriNetUnfolderBase]: 3571/5412 cut-off events. [2024-06-27 19:47:34,770 INFO L125 PetriNetUnfolderBase]: For 849771/849789 co-relation queries the response was YES. [2024-06-27 19:47:34,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52075 conditions, 5412 events. 3571/5412 cut-off events. For 849771/849789 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 27897 event pairs, 1038 based on Foata normal form. 7/5378 useless extension candidates. Maximal degree in co-relation 51982. Up to 5024 conditions per place. [2024-06-27 19:47:34,827 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 200 selfloop transitions, 26 changer transitions 0/267 dead transitions. [2024-06-27 19:47:34,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 267 transitions, 3163 flow [2024-06-27 19:47:34,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:47:34,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:47:34,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-27 19:47:34,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-27 19:47:34,828 INFO L175 Difference]: Start difference. First operand has 204 places, 247 transitions, 2503 flow. Second operand 7 states and 133 transitions. [2024-06-27 19:47:34,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 267 transitions, 3163 flow [2024-06-27 19:47:35,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 267 transitions, 2835 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-27 19:47:35,699 INFO L231 Difference]: Finished difference. Result has 200 places, 250 transitions, 2269 flow [2024-06-27 19:47:35,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2175, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2269, PETRI_PLACES=200, PETRI_TRANSITIONS=250} [2024-06-27 19:47:35,700 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 155 predicate places. [2024-06-27 19:47:35,700 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 250 transitions, 2269 flow [2024-06-27 19:47:35,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:35,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:35,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:35,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 19:47:35,700 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:35,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:35,700 INFO L85 PathProgramCache]: Analyzing trace with hash 478516682, now seen corresponding path program 1 times [2024-06-27 19:47:35,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:35,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577388404] [2024-06-27 19:47:35,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:35,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:35,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:36,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:36,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:36,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577388404] [2024-06-27 19:47:36,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577388404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:36,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:36,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:47:36,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072412294] [2024-06-27 19:47:36,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:36,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:47:36,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:36,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:47:36,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:47:36,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 19:47:36,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 250 transitions, 2269 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:36,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:36,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 19:47:36,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:37,481 INFO L124 PetriNetUnfolderBase]: 3353/5141 cut-off events. [2024-06-27 19:47:37,482 INFO L125 PetriNetUnfolderBase]: For 887698/887749 co-relation queries the response was YES. [2024-06-27 19:47:37,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50663 conditions, 5141 events. 3353/5141 cut-off events. For 887698/887749 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 26841 event pairs, 986 based on Foata normal form. 17/5079 useless extension candidates. Maximal degree in co-relation 50569. Up to 4645 conditions per place. [2024-06-27 19:47:37,537 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 202 selfloop transitions, 23 changer transitions 0/280 dead transitions. [2024-06-27 19:47:37,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 280 transitions, 2991 flow [2024-06-27 19:47:37,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:47:37,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:47:37,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-27 19:47:37,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-27 19:47:37,538 INFO L175 Difference]: Start difference. First operand has 200 places, 250 transitions, 2269 flow. Second operand 7 states and 143 transitions. [2024-06-27 19:47:37,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 280 transitions, 2991 flow [2024-06-27 19:47:38,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 280 transitions, 2931 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 19:47:38,205 INFO L231 Difference]: Finished difference. Result has 204 places, 259 transitions, 2371 flow [2024-06-27 19:47:38,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2209, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2371, PETRI_PLACES=204, PETRI_TRANSITIONS=259} [2024-06-27 19:47:38,206 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 159 predicate places. [2024-06-27 19:47:38,206 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 259 transitions, 2371 flow [2024-06-27 19:47:38,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:38,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:38,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:38,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 19:47:38,206 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:38,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:38,207 INFO L85 PathProgramCache]: Analyzing trace with hash -222895749, now seen corresponding path program 2 times [2024-06-27 19:47:38,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:38,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199405773] [2024-06-27 19:47:38,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:38,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:38,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:39,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:39,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:39,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199405773] [2024-06-27 19:47:39,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199405773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:39,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:39,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:47:39,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83288017] [2024-06-27 19:47:39,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:39,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:47:39,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:39,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:47:39,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:47:39,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:47:39,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 259 transitions, 2371 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:39,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:39,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:47:39,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:40,464 INFO L124 PetriNetUnfolderBase]: 3688/5543 cut-off events. [2024-06-27 19:47:40,464 INFO L125 PetriNetUnfolderBase]: For 947101/947131 co-relation queries the response was YES. [2024-06-27 19:47:40,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54914 conditions, 5543 events. 3688/5543 cut-off events. For 947101/947131 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 28560 event pairs, 990 based on Foata normal form. 12/5490 useless extension candidates. Maximal degree in co-relation 54818. Up to 5168 conditions per place. [2024-06-27 19:47:40,522 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 245 selfloop transitions, 19 changer transitions 0/290 dead transitions. [2024-06-27 19:47:40,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 290 transitions, 3041 flow [2024-06-27 19:47:40,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:47:40,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:47:40,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-27 19:47:40,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217171717171717 [2024-06-27 19:47:40,523 INFO L175 Difference]: Start difference. First operand has 204 places, 259 transitions, 2371 flow. Second operand 9 states and 167 transitions. [2024-06-27 19:47:40,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 290 transitions, 3041 flow [2024-06-27 19:47:41,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 290 transitions, 3001 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-27 19:47:41,061 INFO L231 Difference]: Finished difference. Result has 211 places, 261 transitions, 2448 flow [2024-06-27 19:47:41,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2331, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2448, PETRI_PLACES=211, PETRI_TRANSITIONS=261} [2024-06-27 19:47:41,061 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 166 predicate places. [2024-06-27 19:47:41,062 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 261 transitions, 2448 flow [2024-06-27 19:47:41,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:41,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:41,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:41,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 19:47:41,062 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:41,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:41,063 INFO L85 PathProgramCache]: Analyzing trace with hash -222578960, now seen corresponding path program 1 times [2024-06-27 19:47:41,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:41,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866462742] [2024-06-27 19:47:41,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:41,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:41,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:42,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:42,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:42,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866462742] [2024-06-27 19:47:42,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866462742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:42,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:42,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:47:42,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361765025] [2024-06-27 19:47:42,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:42,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:47:42,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:42,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:47:42,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:47:42,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 19:47:42,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 261 transitions, 2448 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:42,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:42,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 19:47:42,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:43,492 INFO L124 PetriNetUnfolderBase]: 3904/5813 cut-off events. [2024-06-27 19:47:43,492 INFO L125 PetriNetUnfolderBase]: For 932708/932708 co-relation queries the response was YES. [2024-06-27 19:47:43,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55919 conditions, 5813 events. 3904/5813 cut-off events. For 932708/932708 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 29294 event pairs, 1052 based on Foata normal form. 2/5810 useless extension candidates. Maximal degree in co-relation 55820. Up to 5539 conditions per place. [2024-06-27 19:47:43,556 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 256 selfloop transitions, 28 changer transitions 0/296 dead transitions. [2024-06-27 19:47:43,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 296 transitions, 3198 flow [2024-06-27 19:47:43,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:47:43,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:47:43,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 19:47:43,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065656565656566 [2024-06-27 19:47:43,557 INFO L175 Difference]: Start difference. First operand has 211 places, 261 transitions, 2448 flow. Second operand 9 states and 161 transitions. [2024-06-27 19:47:43,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 296 transitions, 3198 flow [2024-06-27 19:47:44,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 296 transitions, 3101 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-27 19:47:44,582 INFO L231 Difference]: Finished difference. Result has 214 places, 267 transitions, 2537 flow [2024-06-27 19:47:44,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2351, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2537, PETRI_PLACES=214, PETRI_TRANSITIONS=267} [2024-06-27 19:47:44,582 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 169 predicate places. [2024-06-27 19:47:44,582 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 267 transitions, 2537 flow [2024-06-27 19:47:44,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:44,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:44,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:44,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 19:47:44,583 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:44,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:44,583 INFO L85 PathProgramCache]: Analyzing trace with hash 281867376, now seen corresponding path program 11 times [2024-06-27 19:47:44,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:44,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709253770] [2024-06-27 19:47:44,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:44,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:44,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:45,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:45,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:45,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709253770] [2024-06-27 19:47:45,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709253770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:45,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:45,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:47:45,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845556351] [2024-06-27 19:47:45,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:45,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:47:45,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:45,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:47:45,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:47:45,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:47:45,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 267 transitions, 2537 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:45,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:45,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:47:45,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:46,700 INFO L124 PetriNetUnfolderBase]: 3608/5481 cut-off events. [2024-06-27 19:47:46,700 INFO L125 PetriNetUnfolderBase]: For 959004/959004 co-relation queries the response was YES. [2024-06-27 19:47:46,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55016 conditions, 5481 events. 3608/5481 cut-off events. For 959004/959004 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 29282 event pairs, 906 based on Foata normal form. 4/5480 useless extension candidates. Maximal degree in co-relation 54916. Up to 4794 conditions per place. [2024-06-27 19:47:46,758 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 241 selfloop transitions, 57 changer transitions 0/313 dead transitions. [2024-06-27 19:47:46,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 313 transitions, 3887 flow [2024-06-27 19:47:46,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:47:46,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:47:46,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-27 19:47:46,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45227272727272727 [2024-06-27 19:47:46,759 INFO L175 Difference]: Start difference. First operand has 214 places, 267 transitions, 2537 flow. Second operand 10 states and 199 transitions. [2024-06-27 19:47:46,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 313 transitions, 3887 flow [2024-06-27 19:47:47,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 313 transitions, 3779 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-27 19:47:47,619 INFO L231 Difference]: Finished difference. Result has 217 places, 273 transitions, 2683 flow [2024-06-27 19:47:47,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2429, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2683, PETRI_PLACES=217, PETRI_TRANSITIONS=273} [2024-06-27 19:47:47,619 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 172 predicate places. [2024-06-27 19:47:47,619 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 273 transitions, 2683 flow [2024-06-27 19:47:47,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:47,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:47,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:47,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 19:47:47,620 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:47,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:47,620 INFO L85 PathProgramCache]: Analyzing trace with hash 281659986, now seen corresponding path program 12 times [2024-06-27 19:47:47,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:47,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673921733] [2024-06-27 19:47:47,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:47,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:47,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:48,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:48,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:48,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673921733] [2024-06-27 19:47:48,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673921733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:48,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:48,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:47:48,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873771878] [2024-06-27 19:47:48,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:48,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:47:48,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:48,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:47:48,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:47:48,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:47:48,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 273 transitions, 2683 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:48,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:48,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:47:48,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:49,848 INFO L124 PetriNetUnfolderBase]: 3630/5513 cut-off events. [2024-06-27 19:47:49,849 INFO L125 PetriNetUnfolderBase]: For 987329/987329 co-relation queries the response was YES. [2024-06-27 19:47:49,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55785 conditions, 5513 events. 3630/5513 cut-off events. For 987329/987329 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 29456 event pairs, 904 based on Foata normal form. 4/5512 useless extension candidates. Maximal degree in co-relation 55684. Up to 4813 conditions per place. [2024-06-27 19:47:49,911 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 233 selfloop transitions, 66 changer transitions 0/314 dead transitions. [2024-06-27 19:47:49,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 314 transitions, 3717 flow [2024-06-27 19:47:49,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:47:49,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:47:49,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-27 19:47:49,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-27 19:47:49,912 INFO L175 Difference]: Start difference. First operand has 217 places, 273 transitions, 2683 flow. Second operand 10 states and 195 transitions. [2024-06-27 19:47:49,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 314 transitions, 3717 flow [2024-06-27 19:47:50,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 314 transitions, 3454 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-27 19:47:50,784 INFO L231 Difference]: Finished difference. Result has 219 places, 276 transitions, 2632 flow [2024-06-27 19:47:50,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2435, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2632, PETRI_PLACES=219, PETRI_TRANSITIONS=276} [2024-06-27 19:47:50,785 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 174 predicate places. [2024-06-27 19:47:50,785 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 276 transitions, 2632 flow [2024-06-27 19:47:50,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:50,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:50,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:50,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 19:47:50,785 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:50,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:50,787 INFO L85 PathProgramCache]: Analyzing trace with hash 862196761, now seen corresponding path program 3 times [2024-06-27 19:47:50,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:50,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439684275] [2024-06-27 19:47:50,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:50,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:50,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:51,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:51,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:51,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439684275] [2024-06-27 19:47:51,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439684275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:51,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:51,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:47:51,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785955653] [2024-06-27 19:47:51,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:51,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:47:51,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:51,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:47:51,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:47:52,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:47:52,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 276 transitions, 2632 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:52,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:52,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:47:52,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:53,359 INFO L124 PetriNetUnfolderBase]: 3796/5716 cut-off events. [2024-06-27 19:47:53,359 INFO L125 PetriNetUnfolderBase]: For 1043365/1043383 co-relation queries the response was YES. [2024-06-27 19:47:53,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57730 conditions, 5716 events. 3796/5716 cut-off events. For 1043365/1043383 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 29569 event pairs, 1016 based on Foata normal form. 12/5681 useless extension candidates. Maximal degree in co-relation 57628. Up to 5300 conditions per place. [2024-06-27 19:47:53,415 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 253 selfloop transitions, 26 changer transitions 0/307 dead transitions. [2024-06-27 19:47:53,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 307 transitions, 3338 flow [2024-06-27 19:47:53,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:47:53,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:47:53,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 19:47:53,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-27 19:47:53,416 INFO L175 Difference]: Start difference. First operand has 219 places, 276 transitions, 2632 flow. Second operand 9 states and 168 transitions. [2024-06-27 19:47:53,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 307 transitions, 3338 flow [2024-06-27 19:47:54,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 307 transitions, 3099 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-27 19:47:54,348 INFO L231 Difference]: Finished difference. Result has 220 places, 278 transitions, 2533 flow [2024-06-27 19:47:54,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2393, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2533, PETRI_PLACES=220, PETRI_TRANSITIONS=278} [2024-06-27 19:47:54,349 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 175 predicate places. [2024-06-27 19:47:54,349 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 278 transitions, 2533 flow [2024-06-27 19:47:54,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:54,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:54,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:54,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 19:47:54,349 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:54,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:54,349 INFO L85 PathProgramCache]: Analyzing trace with hash 289294263, now seen corresponding path program 4 times [2024-06-27 19:47:54,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:54,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573713021] [2024-06-27 19:47:54,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:54,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:54,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:55,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:55,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:55,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573713021] [2024-06-27 19:47:55,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573713021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:55,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:55,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:47:55,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947940588] [2024-06-27 19:47:55,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:55,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:47:55,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:55,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:47:55,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:47:55,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:47:55,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 278 transitions, 2533 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:55,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:55,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:47:55,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:56,718 INFO L124 PetriNetUnfolderBase]: 3813/5743 cut-off events. [2024-06-27 19:47:56,718 INFO L125 PetriNetUnfolderBase]: For 1072473/1072491 co-relation queries the response was YES. [2024-06-27 19:47:56,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58119 conditions, 5743 events. 3813/5743 cut-off events. For 1072473/1072491 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 29791 event pairs, 989 based on Foata normal form. 12/5708 useless extension candidates. Maximal degree in co-relation 58016. Up to 5300 conditions per place. [2024-06-27 19:47:56,779 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 257 selfloop transitions, 29 changer transitions 0/314 dead transitions. [2024-06-27 19:47:56,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 314 transitions, 3289 flow [2024-06-27 19:47:56,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:47:56,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:47:56,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-27 19:47:56,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43434343434343436 [2024-06-27 19:47:56,780 INFO L175 Difference]: Start difference. First operand has 220 places, 278 transitions, 2533 flow. Second operand 9 states and 172 transitions. [2024-06-27 19:47:56,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 314 transitions, 3289 flow [2024-06-27 19:47:57,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 314 transitions, 3165 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-27 19:47:57,655 INFO L231 Difference]: Finished difference. Result has 223 places, 283 transitions, 2584 flow [2024-06-27 19:47:57,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2413, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2584, PETRI_PLACES=223, PETRI_TRANSITIONS=283} [2024-06-27 19:47:57,656 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 178 predicate places. [2024-06-27 19:47:57,656 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 283 transitions, 2584 flow [2024-06-27 19:47:57,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:57,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:57,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:57,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 19:47:57,656 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:57,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:57,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1851376314, now seen corresponding path program 13 times [2024-06-27 19:47:57,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:57,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055765348] [2024-06-27 19:47:57,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:57,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:57,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:58,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:58,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:58,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055765348] [2024-06-27 19:47:58,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055765348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:58,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:58,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:47:58,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957253934] [2024-06-27 19:47:58,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:58,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:47:58,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:58,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:47:58,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:47:58,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:47:58,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 283 transitions, 2584 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:58,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:58,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:47:58,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:59,905 INFO L124 PetriNetUnfolderBase]: 3671/5580 cut-off events. [2024-06-27 19:47:59,906 INFO L125 PetriNetUnfolderBase]: For 1031872/1031872 co-relation queries the response was YES. [2024-06-27 19:47:59,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56491 conditions, 5580 events. 3671/5580 cut-off events. For 1031872/1031872 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 29831 event pairs, 909 based on Foata normal form. 4/5579 useless extension candidates. Maximal degree in co-relation 56386. Up to 4865 conditions per place. [2024-06-27 19:47:59,968 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 240 selfloop transitions, 65 changer transitions 0/321 dead transitions. [2024-06-27 19:47:59,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 321 transitions, 3566 flow [2024-06-27 19:47:59,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:47:59,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:47:59,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-27 19:47:59,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44545454545454544 [2024-06-27 19:47:59,969 INFO L175 Difference]: Start difference. First operand has 223 places, 283 transitions, 2584 flow. Second operand 10 states and 196 transitions. [2024-06-27 19:47:59,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 321 transitions, 3566 flow [2024-06-27 19:48:00,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 321 transitions, 3401 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-27 19:48:00,782 INFO L231 Difference]: Finished difference. Result has 227 places, 283 transitions, 2557 flow [2024-06-27 19:48:00,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2419, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2557, PETRI_PLACES=227, PETRI_TRANSITIONS=283} [2024-06-27 19:48:00,782 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 182 predicate places. [2024-06-27 19:48:00,782 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 283 transitions, 2557 flow [2024-06-27 19:48:00,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:00,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:00,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:00,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 19:48:00,782 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:48:00,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:00,783 INFO L85 PathProgramCache]: Analyzing trace with hash 289017216, now seen corresponding path program 14 times [2024-06-27 19:48:00,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:00,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263967924] [2024-06-27 19:48:00,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:00,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:00,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:01,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:48:01,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:01,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263967924] [2024-06-27 19:48:01,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263967924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:01,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:01,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:48:01,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928339814] [2024-06-27 19:48:01,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:01,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:48:01,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:01,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:48:01,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:48:01,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:48:01,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 283 transitions, 2557 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:01,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:01,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:48:01,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:03,021 INFO L124 PetriNetUnfolderBase]: 3683/5597 cut-off events. [2024-06-27 19:48:03,021 INFO L125 PetriNetUnfolderBase]: For 1058732/1058732 co-relation queries the response was YES. [2024-06-27 19:48:03,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56985 conditions, 5597 events. 3683/5597 cut-off events. For 1058732/1058732 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 30022 event pairs, 946 based on Foata normal form. 4/5591 useless extension candidates. Maximal degree in co-relation 56879. Up to 4880 conditions per place. [2024-06-27 19:48:03,085 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 245 selfloop transitions, 63 changer transitions 0/324 dead transitions. [2024-06-27 19:48:03,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 324 transitions, 3612 flow [2024-06-27 19:48:03,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:48:03,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:48:03,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-27 19:48:03,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 19:48:03,086 INFO L175 Difference]: Start difference. First operand has 227 places, 283 transitions, 2557 flow. Second operand 10 states and 198 transitions. [2024-06-27 19:48:03,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 324 transitions, 3612 flow [2024-06-27 19:48:04,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 324 transitions, 3491 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 19:48:04,046 INFO L231 Difference]: Finished difference. Result has 229 places, 286 transitions, 2633 flow [2024-06-27 19:48:04,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2439, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2633, PETRI_PLACES=229, PETRI_TRANSITIONS=286} [2024-06-27 19:48:04,047 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 184 predicate places. [2024-06-27 19:48:04,047 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 286 transitions, 2633 flow [2024-06-27 19:48:04,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:04,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:04,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:04,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 19:48:04,047 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:48:04,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:04,048 INFO L85 PathProgramCache]: Analyzing trace with hash 281659831, now seen corresponding path program 5 times [2024-06-27 19:48:04,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:04,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942523150] [2024-06-27 19:48:04,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:04,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:04,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:05,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:48:05,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:05,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942523150] [2024-06-27 19:48:05,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942523150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:05,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:05,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:48:05,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205127134] [2024-06-27 19:48:05,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:05,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:48:05,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:05,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:48:05,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:48:05,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:48:05,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 286 transitions, 2633 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:05,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:05,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:48:05,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:06,467 INFO L124 PetriNetUnfolderBase]: 3678/5590 cut-off events. [2024-06-27 19:48:06,467 INFO L125 PetriNetUnfolderBase]: For 1077401/1077401 co-relation queries the response was YES. [2024-06-27 19:48:06,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57170 conditions, 5590 events. 3678/5590 cut-off events. For 1077401/1077401 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 29971 event pairs, 956 based on Foata normal form. 2/5587 useless extension candidates. Maximal degree in co-relation 57063. Up to 5259 conditions per place. [2024-06-27 19:48:06,528 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 281 selfloop transitions, 23 changer transitions 0/320 dead transitions. [2024-06-27 19:48:06,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 320 transitions, 3413 flow [2024-06-27 19:48:06,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:48:06,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:48:06,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-27 19:48:06,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4159090909090909 [2024-06-27 19:48:06,530 INFO L175 Difference]: Start difference. First operand has 229 places, 286 transitions, 2633 flow. Second operand 10 states and 183 transitions. [2024-06-27 19:48:06,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 320 transitions, 3413 flow [2024-06-27 19:48:07,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 320 transitions, 3274 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-27 19:48:07,349 INFO L231 Difference]: Finished difference. Result has 232 places, 289 transitions, 2648 flow [2024-06-27 19:48:07,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2494, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2648, PETRI_PLACES=232, PETRI_TRANSITIONS=289} [2024-06-27 19:48:07,350 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 187 predicate places. [2024-06-27 19:48:07,350 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 289 transitions, 2648 flow [2024-06-27 19:48:07,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:07,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:07,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:07,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 19:48:07,350 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:48:07,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:07,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1270459169, now seen corresponding path program 5 times [2024-06-27 19:48:07,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:07,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477367042] [2024-06-27 19:48:07,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:07,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:07,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:08,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:48:08,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:08,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477367042] [2024-06-27 19:48:08,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477367042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:08,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:08,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:48:08,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661789065] [2024-06-27 19:48:08,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:08,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:48:08,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:08,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:48:08,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:48:08,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:48:08,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 289 transitions, 2648 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:08,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:08,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:48:08,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:09,893 INFO L124 PetriNetUnfolderBase]: 3843/5790 cut-off events. [2024-06-27 19:48:09,893 INFO L125 PetriNetUnfolderBase]: For 1142399/1142409 co-relation queries the response was YES. [2024-06-27 19:48:09,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59253 conditions, 5790 events. 3843/5790 cut-off events. For 1142399/1142409 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 30130 event pairs, 994 based on Foata normal form. 14/5764 useless extension candidates. Maximal degree in co-relation 59145. Up to 5396 conditions per place. [2024-06-27 19:48:09,953 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 272 selfloop transitions, 20 changer transitions 0/320 dead transitions. [2024-06-27 19:48:09,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 320 transitions, 3384 flow [2024-06-27 19:48:09,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:48:09,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:48:09,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-27 19:48:09,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217171717171717 [2024-06-27 19:48:09,954 INFO L175 Difference]: Start difference. First operand has 232 places, 289 transitions, 2648 flow. Second operand 9 states and 167 transitions. [2024-06-27 19:48:09,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 320 transitions, 3384 flow [2024-06-27 19:48:10,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 320 transitions, 3254 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-06-27 19:48:10,764 INFO L231 Difference]: Finished difference. Result has 233 places, 291 transitions, 2649 flow [2024-06-27 19:48:10,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2518, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2649, PETRI_PLACES=233, PETRI_TRANSITIONS=291} [2024-06-27 19:48:10,764 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 188 predicate places. [2024-06-27 19:48:10,764 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 291 transitions, 2649 flow [2024-06-27 19:48:10,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:10,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:10,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:10,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 19:48:10,765 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:48:10,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:10,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1595586239, now seen corresponding path program 6 times [2024-06-27 19:48:10,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:10,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864450183] [2024-06-27 19:48:10,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:10,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:10,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:11,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:48:11,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:11,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864450183] [2024-06-27 19:48:11,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864450183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:11,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:11,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:48:11,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735632017] [2024-06-27 19:48:11,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:11,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:48:11,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:11,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:48:11,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:48:12,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:48:12,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 291 transitions, 2649 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:12,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:12,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:48:12,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:13,334 INFO L124 PetriNetUnfolderBase]: 3835/5773 cut-off events. [2024-06-27 19:48:13,334 INFO L125 PetriNetUnfolderBase]: For 1162818/1162833 co-relation queries the response was YES. [2024-06-27 19:48:13,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59303 conditions, 5773 events. 3835/5773 cut-off events. For 1162818/1162833 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 30004 event pairs, 998 based on Foata normal form. 14/5740 useless extension candidates. Maximal degree in co-relation 59194. Up to 5371 conditions per place. [2024-06-27 19:48:13,397 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 274 selfloop transitions, 24 changer transitions 0/326 dead transitions. [2024-06-27 19:48:13,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 326 transitions, 3436 flow [2024-06-27 19:48:13,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:48:13,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:48:13,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 19:48:13,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292929292929293 [2024-06-27 19:48:13,398 INFO L175 Difference]: Start difference. First operand has 233 places, 291 transitions, 2649 flow. Second operand 9 states and 170 transitions. [2024-06-27 19:48:13,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 326 transitions, 3436 flow [2024-06-27 19:48:14,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 326 transitions, 3323 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-27 19:48:14,475 INFO L231 Difference]: Finished difference. Result has 236 places, 296 transitions, 2718 flow [2024-06-27 19:48:14,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2536, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2718, PETRI_PLACES=236, PETRI_TRANSITIONS=296} [2024-06-27 19:48:14,475 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 191 predicate places. [2024-06-27 19:48:14,476 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 296 transitions, 2718 flow [2024-06-27 19:48:14,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:14,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:14,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:14,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 19:48:14,476 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:48:14,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:14,477 INFO L85 PathProgramCache]: Analyzing trace with hash 537178594, now seen corresponding path program 15 times [2024-06-27 19:48:14,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:14,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193860280] [2024-06-27 19:48:14,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:14,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:14,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:15,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:48:15,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:15,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193860280] [2024-06-27 19:48:15,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193860280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:15,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:15,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:48:15,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860564012] [2024-06-27 19:48:15,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:15,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:48:15,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:15,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:48:15,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:48:15,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:48:15,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 296 transitions, 2718 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:15,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:15,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:48:15,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:16,671 INFO L124 PetriNetUnfolderBase]: 3675/5586 cut-off events. [2024-06-27 19:48:16,671 INFO L125 PetriNetUnfolderBase]: For 1147860/1147860 co-relation queries the response was YES. [2024-06-27 19:48:16,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57865 conditions, 5586 events. 3675/5586 cut-off events. For 1147860/1147860 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 29857 event pairs, 932 based on Foata normal form. 6/5587 useless extension candidates. Maximal degree in co-relation 57754. Up to 5120 conditions per place. [2024-06-27 19:48:16,733 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 281 selfloop transitions, 33 changer transitions 0/331 dead transitions. [2024-06-27 19:48:16,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 331 transitions, 3440 flow [2024-06-27 19:48:16,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:48:16,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:48:16,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-27 19:48:16,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-27 19:48:16,734 INFO L175 Difference]: Start difference. First operand has 236 places, 296 transitions, 2718 flow. Second operand 10 states and 187 transitions. [2024-06-27 19:48:16,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 331 transitions, 3440 flow [2024-06-27 19:48:17,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 331 transitions, 3267 flow, removed 65 selfloop flow, removed 6 redundant places. [2024-06-27 19:48:17,661 INFO L231 Difference]: Finished difference. Result has 240 places, 296 transitions, 2619 flow [2024-06-27 19:48:17,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2545, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2619, PETRI_PLACES=240, PETRI_TRANSITIONS=296} [2024-06-27 19:48:17,661 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 195 predicate places. [2024-06-27 19:48:17,661 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 296 transitions, 2619 flow [2024-06-27 19:48:17,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:17,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:17,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:17,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 19:48:17,662 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:48:17,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:17,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1148542652, now seen corresponding path program 2 times [2024-06-27 19:48:17,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:17,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626734746] [2024-06-27 19:48:17,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:17,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:17,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:18,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:48:18,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:18,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626734746] [2024-06-27 19:48:18,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626734746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:18,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:18,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:48:18,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894139034] [2024-06-27 19:48:18,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:18,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:48:18,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:18,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:48:18,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:48:18,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 19:48:18,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 296 transitions, 2619 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:18,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:18,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 19:48:18,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:19,465 INFO L124 PetriNetUnfolderBase]: 3534/5389 cut-off events. [2024-06-27 19:48:19,465 INFO L125 PetriNetUnfolderBase]: For 1199983/1200074 co-relation queries the response was YES. [2024-06-27 19:48:19,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57362 conditions, 5389 events. 3534/5389 cut-off events. For 1199983/1200074 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 28106 event pairs, 961 based on Foata normal form. 23/5282 useless extension candidates. Maximal degree in co-relation 57250. Up to 4940 conditions per place. [2024-06-27 19:48:19,524 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 239 selfloop transitions, 14 changer transitions 0/311 dead transitions. [2024-06-27 19:48:19,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 311 transitions, 3201 flow [2024-06-27 19:48:19,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:48:19,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:48:19,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 19:48:19,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42207792207792205 [2024-06-27 19:48:19,525 INFO L175 Difference]: Start difference. First operand has 240 places, 296 transitions, 2619 flow. Second operand 7 states and 130 transitions. [2024-06-27 19:48:19,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 311 transitions, 3201 flow [2024-06-27 19:48:20,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 311 transitions, 3035 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-27 19:48:20,399 INFO L231 Difference]: Finished difference. Result has 235 places, 299 transitions, 2539 flow [2024-06-27 19:48:20,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2453, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2539, PETRI_PLACES=235, PETRI_TRANSITIONS=299} [2024-06-27 19:48:20,399 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 190 predicate places. [2024-06-27 19:48:20,399 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 299 transitions, 2539 flow [2024-06-27 19:48:20,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:20,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:20,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:20,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 19:48:20,400 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:48:20,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:20,400 INFO L85 PathProgramCache]: Analyzing trace with hash 921345482, now seen corresponding path program 3 times [2024-06-27 19:48:20,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:20,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286540000] [2024-06-27 19:48:20,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:20,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:20,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:21,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:48:21,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:21,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286540000] [2024-06-27 19:48:21,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286540000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:21,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:21,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:48:21,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943802411] [2024-06-27 19:48:21,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:21,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:48:21,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:21,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:48:21,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:48:21,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 19:48:21,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 299 transitions, 2539 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:21,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:21,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 19:48:21,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:22,283 INFO L124 PetriNetUnfolderBase]: 3525/5377 cut-off events. [2024-06-27 19:48:22,283 INFO L125 PetriNetUnfolderBase]: For 1217037/1217128 co-relation queries the response was YES. [2024-06-27 19:48:22,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57119 conditions, 5377 events. 3525/5377 cut-off events. For 1217037/1217128 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 28113 event pairs, 959 based on Foata normal form. 23/5270 useless extension candidates. Maximal degree in co-relation 57006. Up to 4916 conditions per place. [2024-06-27 19:48:22,342 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 236 selfloop transitions, 19 changer transitions 0/313 dead transitions. [2024-06-27 19:48:22,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 313 transitions, 3085 flow [2024-06-27 19:48:22,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:48:22,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:48:22,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-27 19:48:22,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-06-27 19:48:22,343 INFO L175 Difference]: Start difference. First operand has 235 places, 299 transitions, 2539 flow. Second operand 7 states and 134 transitions. [2024-06-27 19:48:22,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 313 transitions, 3085 flow [2024-06-27 19:48:23,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 313 transitions, 3003 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-27 19:48:23,043 INFO L231 Difference]: Finished difference. Result has 237 places, 299 transitions, 2501 flow [2024-06-27 19:48:23,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2457, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2501, PETRI_PLACES=237, PETRI_TRANSITIONS=299} [2024-06-27 19:48:23,043 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 192 predicate places. [2024-06-27 19:48:23,043 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 299 transitions, 2501 flow [2024-06-27 19:48:23,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:23,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:23,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:23,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 19:48:23,044 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:48:23,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:23,044 INFO L85 PathProgramCache]: Analyzing trace with hash 921345017, now seen corresponding path program 3 times [2024-06-27 19:48:23,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:23,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721843680] [2024-06-27 19:48:23,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:23,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:23,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:23,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:48:23,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:23,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721843680] [2024-06-27 19:48:23,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721843680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:23,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:23,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:48:23,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081638604] [2024-06-27 19:48:23,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:23,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:48:23,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:23,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:48:23,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:48:23,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:48:23,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 299 transitions, 2501 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:23,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:23,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:48:23,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:24,795 INFO L124 PetriNetUnfolderBase]: 3738/5679 cut-off events. [2024-06-27 19:48:24,795 INFO L125 PetriNetUnfolderBase]: For 1217179/1217199 co-relation queries the response was YES. [2024-06-27 19:48:24,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58794 conditions, 5679 events. 3738/5679 cut-off events. For 1217179/1217199 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 29629 event pairs, 1014 based on Foata normal form. 9/5640 useless extension candidates. Maximal degree in co-relation 58681. Up to 5329 conditions per place. [2024-06-27 19:48:24,967 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 253 selfloop transitions, 14 changer transitions 0/309 dead transitions. [2024-06-27 19:48:24,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 309 transitions, 3059 flow [2024-06-27 19:48:24,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:48:24,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:48:24,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 19:48:24,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3961038961038961 [2024-06-27 19:48:24,968 INFO L175 Difference]: Start difference. First operand has 237 places, 299 transitions, 2501 flow. Second operand 7 states and 122 transitions. [2024-06-27 19:48:24,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 309 transitions, 3059 flow [2024-06-27 19:48:25,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 309 transitions, 2975 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 19:48:25,701 INFO L231 Difference]: Finished difference. Result has 238 places, 299 transitions, 2451 flow [2024-06-27 19:48:25,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2417, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2451, PETRI_PLACES=238, PETRI_TRANSITIONS=299} [2024-06-27 19:48:25,701 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 193 predicate places. [2024-06-27 19:48:25,701 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 299 transitions, 2451 flow [2024-06-27 19:48:25,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:25,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:25,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:25,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 19:48:25,702 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:48:25,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:25,702 INFO L85 PathProgramCache]: Analyzing trace with hash 714788111, now seen corresponding path program 1 times [2024-06-27 19:48:25,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:25,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862856526] [2024-06-27 19:48:25,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:25,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:25,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:26,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:48:26,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:26,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862856526] [2024-06-27 19:48:26,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862856526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:26,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:26,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:48:26,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366886860] [2024-06-27 19:48:26,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:26,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:48:26,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:26,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:48:26,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:48:26,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 19:48:26,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 299 transitions, 2451 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:26,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:26,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 19:48:26,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:27,639 INFO L124 PetriNetUnfolderBase]: 4047/5992 cut-off events. [2024-06-27 19:48:27,639 INFO L125 PetriNetUnfolderBase]: For 1262222/1262243 co-relation queries the response was YES. [2024-06-27 19:48:27,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61082 conditions, 5992 events. 4047/5992 cut-off events. For 1262222/1262243 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 30253 event pairs, 1085 based on Foata normal form. 13/5960 useless extension candidates. Maximal degree in co-relation 60968. Up to 5812 conditions per place. [2024-06-27 19:48:27,709 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 279 selfloop transitions, 24 changer transitions 0/322 dead transitions. [2024-06-27 19:48:27,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 322 transitions, 3333 flow [2024-06-27 19:48:27,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:48:27,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:48:27,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 19:48:27,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-27 19:48:27,710 INFO L175 Difference]: Start difference. First operand has 238 places, 299 transitions, 2451 flow. Second operand 7 states and 126 transitions. [2024-06-27 19:48:27,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 322 transitions, 3333 flow [2024-06-27 19:48:28,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 322 transitions, 3277 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 19:48:28,640 INFO L231 Difference]: Finished difference. Result has 238 places, 305 transitions, 2527 flow [2024-06-27 19:48:28,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2395, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2527, PETRI_PLACES=238, PETRI_TRANSITIONS=305} [2024-06-27 19:48:28,640 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 193 predicate places. [2024-06-27 19:48:28,640 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 305 transitions, 2527 flow [2024-06-27 19:48:28,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:28,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:28,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:28,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 19:48:28,641 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:48:28,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:28,641 INFO L85 PathProgramCache]: Analyzing trace with hash 914239631, now seen corresponding path program 2 times [2024-06-27 19:48:28,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:28,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899962720] [2024-06-27 19:48:28,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:28,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:28,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:29,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:48:29,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:29,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899962720] [2024-06-27 19:48:29,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899962720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:29,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:29,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:48:29,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701282352] [2024-06-27 19:48:29,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:29,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:48:29,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:29,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:48:29,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:48:29,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 19:48:29,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 305 transitions, 2527 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:29,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:29,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 19:48:29,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:30,616 INFO L124 PetriNetUnfolderBase]: 4052/5999 cut-off events. [2024-06-27 19:48:30,617 INFO L125 PetriNetUnfolderBase]: For 1293205/1293226 co-relation queries the response was YES. [2024-06-27 19:48:30,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62047 conditions, 5999 events. 4052/5999 cut-off events. For 1293205/1293226 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 30284 event pairs, 1085 based on Foata normal form. 13/5967 useless extension candidates. Maximal degree in co-relation 61932. Up to 5818 conditions per place. [2024-06-27 19:48:30,687 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 277 selfloop transitions, 26 changer transitions 0/322 dead transitions. [2024-06-27 19:48:30,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 322 transitions, 3373 flow [2024-06-27 19:48:30,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:48:30,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:48:30,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-27 19:48:30,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025974025974026 [2024-06-27 19:48:30,688 INFO L175 Difference]: Start difference. First operand has 238 places, 305 transitions, 2527 flow. Second operand 7 states and 124 transitions. [2024-06-27 19:48:30,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 322 transitions, 3373 flow [2024-06-27 19:48:32,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 322 transitions, 3295 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-27 19:48:32,042 INFO L231 Difference]: Finished difference. Result has 242 places, 308 transitions, 2549 flow [2024-06-27 19:48:32,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2463, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2549, PETRI_PLACES=242, PETRI_TRANSITIONS=308} [2024-06-27 19:48:32,043 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 197 predicate places. [2024-06-27 19:48:32,043 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 308 transitions, 2549 flow [2024-06-27 19:48:32,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:32,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:32,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:32,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 19:48:32,044 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:48:32,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:32,044 INFO L85 PathProgramCache]: Analyzing trace with hash 464408662, now seen corresponding path program 1 times [2024-06-27 19:48:32,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:32,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665386065] [2024-06-27 19:48:32,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:32,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:32,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:32,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:48:32,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:32,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665386065] [2024-06-27 19:48:32,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665386065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:32,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:32,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:48:32,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777301945] [2024-06-27 19:48:32,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:32,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:48:32,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:32,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:48:32,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:48:32,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 19:48:32,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 308 transitions, 2549 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:32,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:32,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 19:48:32,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:34,206 INFO L124 PetriNetUnfolderBase]: 4067/6020 cut-off events. [2024-06-27 19:48:34,206 INFO L125 PetriNetUnfolderBase]: For 1328016/1328037 co-relation queries the response was YES. [2024-06-27 19:48:34,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62286 conditions, 6020 events. 4067/6020 cut-off events. For 1328016/1328037 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 30406 event pairs, 1082 based on Foata normal form. 15/5990 useless extension candidates. Maximal degree in co-relation 62169. Up to 5820 conditions per place. [2024-06-27 19:48:34,278 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 289 selfloop transitions, 25 changer transitions 0/333 dead transitions. [2024-06-27 19:48:34,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 333 transitions, 3491 flow [2024-06-27 19:48:34,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:48:34,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:48:34,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 19:48:34,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42207792207792205 [2024-06-27 19:48:34,279 INFO L175 Difference]: Start difference. First operand has 242 places, 308 transitions, 2549 flow. Second operand 7 states and 130 transitions. [2024-06-27 19:48:34,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 333 transitions, 3491 flow [2024-06-27 19:48:35,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 333 transitions, 3439 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 19:48:35,322 INFO L231 Difference]: Finished difference. Result has 245 places, 314 transitions, 2659 flow [2024-06-27 19:48:35,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2497, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2659, PETRI_PLACES=245, PETRI_TRANSITIONS=314} [2024-06-27 19:48:35,322 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 200 predicate places. [2024-06-27 19:48:35,323 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 314 transitions, 2659 flow [2024-06-27 19:48:35,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:35,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:35,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:35,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 19:48:35,323 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:48:35,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:35,324 INFO L85 PathProgramCache]: Analyzing trace with hash 693672262, now seen corresponding path program 2 times [2024-06-27 19:48:35,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:35,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098821649] [2024-06-27 19:48:35,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:35,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:35,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:36,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:48:36,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:36,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098821649] [2024-06-27 19:48:36,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098821649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:36,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:36,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:48:36,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778427246] [2024-06-27 19:48:36,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:36,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:48:36,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:36,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:48:36,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:48:36,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 19:48:36,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 314 transitions, 2659 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:36,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:36,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 19:48:36,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:37,365 INFO L124 PetriNetUnfolderBase]: 4082/6042 cut-off events. [2024-06-27 19:48:37,365 INFO L125 PetriNetUnfolderBase]: For 1360603/1360627 co-relation queries the response was YES. [2024-06-27 19:48:37,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63256 conditions, 6042 events. 4082/6042 cut-off events. For 1360603/1360627 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 30514 event pairs, 1084 based on Foata normal form. 17/6013 useless extension candidates. Maximal degree in co-relation 63138. Up to 5834 conditions per place. [2024-06-27 19:48:37,438 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 284 selfloop transitions, 29 changer transitions 0/332 dead transitions. [2024-06-27 19:48:37,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 332 transitions, 3547 flow [2024-06-27 19:48:37,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:48:37,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:48:37,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-27 19:48:37,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025974025974026 [2024-06-27 19:48:37,439 INFO L175 Difference]: Start difference. First operand has 245 places, 314 transitions, 2659 flow. Second operand 7 states and 124 transitions. [2024-06-27 19:48:37,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 332 transitions, 3547 flow [2024-06-27 19:48:38,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 332 transitions, 3483 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-27 19:48:38,598 INFO L231 Difference]: Finished difference. Result has 249 places, 317 transitions, 2716 flow [2024-06-27 19:48:38,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2597, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2716, PETRI_PLACES=249, PETRI_TRANSITIONS=317} [2024-06-27 19:48:38,599 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 204 predicate places. [2024-06-27 19:48:38,599 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 317 transitions, 2716 flow [2024-06-27 19:48:38,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:38,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:38,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:38,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 19:48:38,600 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:48:38,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:38,600 INFO L85 PathProgramCache]: Analyzing trace with hash -802698885, now seen corresponding path program 3 times [2024-06-27 19:48:38,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:38,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531088873] [2024-06-27 19:48:38,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:38,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:38,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:39,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:48:39,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:39,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531088873] [2024-06-27 19:48:39,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531088873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:39,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:39,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:48:39,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606159582] [2024-06-27 19:48:39,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:39,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:48:39,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:39,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:48:39,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:48:39,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 19:48:39,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 317 transitions, 2716 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:39,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:39,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 19:48:39,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:40,622 INFO L124 PetriNetUnfolderBase]: 4079/6038 cut-off events. [2024-06-27 19:48:40,622 INFO L125 PetriNetUnfolderBase]: For 1379665/1379689 co-relation queries the response was YES. [2024-06-27 19:48:40,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63491 conditions, 6038 events. 4079/6038 cut-off events. For 1379665/1379689 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 30524 event pairs, 1091 based on Foata normal form. 13/6005 useless extension candidates. Maximal degree in co-relation 63371. Up to 5857 conditions per place. [2024-06-27 19:48:40,690 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 282 selfloop transitions, 26 changer transitions 0/327 dead transitions. [2024-06-27 19:48:40,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 327 transitions, 3356 flow [2024-06-27 19:48:40,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:48:40,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:48:40,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-27 19:48:40,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38961038961038963 [2024-06-27 19:48:40,691 INFO L175 Difference]: Start difference. First operand has 249 places, 317 transitions, 2716 flow. Second operand 7 states and 120 transitions. [2024-06-27 19:48:40,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 327 transitions, 3356 flow [2024-06-27 19:48:42,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 327 transitions, 3249 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-27 19:48:42,078 INFO L231 Difference]: Finished difference. Result has 252 places, 317 transitions, 2667 flow [2024-06-27 19:48:42,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2609, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2667, PETRI_PLACES=252, PETRI_TRANSITIONS=317} [2024-06-27 19:48:42,079 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 207 predicate places. [2024-06-27 19:48:42,079 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 317 transitions, 2667 flow [2024-06-27 19:48:42,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:42,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:42,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:42,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 19:48:42,079 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:48:42,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:42,080 INFO L85 PathProgramCache]: Analyzing trace with hash 921591498, now seen corresponding path program 3 times [2024-06-27 19:48:42,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:42,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571703378] [2024-06-27 19:48:42,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:42,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:42,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:42,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:48:42,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:42,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571703378] [2024-06-27 19:48:42,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571703378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:42,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:42,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:48:42,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966288142] [2024-06-27 19:48:42,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:42,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:48:42,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:42,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:48:42,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:48:42,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 19:48:42,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 317 transitions, 2667 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:42,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:42,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 19:48:42,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:44,230 INFO L124 PetriNetUnfolderBase]: 4070/6026 cut-off events. [2024-06-27 19:48:44,230 INFO L125 PetriNetUnfolderBase]: For 1404316/1404340 co-relation queries the response was YES. [2024-06-27 19:48:44,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63297 conditions, 6026 events. 4070/6026 cut-off events. For 1404316/1404340 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 30539 event pairs, 1082 based on Foata normal form. 17/5997 useless extension candidates. Maximal degree in co-relation 63176. Up to 5823 conditions per place. [2024-06-27 19:48:44,294 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 286 selfloop transitions, 28 changer transitions 0/333 dead transitions. [2024-06-27 19:48:44,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 333 transitions, 3337 flow [2024-06-27 19:48:44,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:48:44,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:48:44,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 19:48:44,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-27 19:48:44,295 INFO L175 Difference]: Start difference. First operand has 252 places, 317 transitions, 2667 flow. Second operand 7 states and 126 transitions. [2024-06-27 19:48:44,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 333 transitions, 3337 flow [2024-06-27 19:48:45,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 333 transitions, 3229 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-27 19:48:45,769 INFO L231 Difference]: Finished difference. Result has 251 places, 317 transitions, 2621 flow [2024-06-27 19:48:45,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2559, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2621, PETRI_PLACES=251, PETRI_TRANSITIONS=317} [2024-06-27 19:48:45,769 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 206 predicate places. [2024-06-27 19:48:45,769 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 317 transitions, 2621 flow [2024-06-27 19:48:45,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:45,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:45,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:45,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 19:48:45,770 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:48:45,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:45,770 INFO L85 PathProgramCache]: Analyzing trace with hash -486303227, now seen corresponding path program 1 times [2024-06-27 19:48:45,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:45,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241541889] [2024-06-27 19:48:45,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:45,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:45,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:47,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:48:47,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:47,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241541889] [2024-06-27 19:48:47,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241541889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:47,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:47,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:48:47,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6941034] [2024-06-27 19:48:47,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:47,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:48:47,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:47,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:48:47,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:48:47,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:48:47,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 317 transitions, 2621 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:47,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:47,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:48:47,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:49,093 INFO L124 PetriNetUnfolderBase]: 3746/5695 cut-off events. [2024-06-27 19:48:49,093 INFO L125 PetriNetUnfolderBase]: For 1393434/1393434 co-relation queries the response was YES. [2024-06-27 19:48:49,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61389 conditions, 5695 events. 3746/5695 cut-off events. For 1393434/1393434 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 30703 event pairs, 759 based on Foata normal form. 4/5676 useless extension candidates. Maximal degree in co-relation 61268. Up to 5190 conditions per place. [2024-06-27 19:48:49,161 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 319 selfloop transitions, 30 changer transitions 0/372 dead transitions. [2024-06-27 19:48:49,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 372 transitions, 3943 flow [2024-06-27 19:48:49,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:48:49,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:48:49,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-06-27 19:48:49,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44834710743801653 [2024-06-27 19:48:49,163 INFO L175 Difference]: Start difference. First operand has 251 places, 317 transitions, 2621 flow. Second operand 11 states and 217 transitions. [2024-06-27 19:48:49,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 372 transitions, 3943 flow [2024-06-27 19:48:50,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 372 transitions, 3862 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 19:48:50,607 INFO L231 Difference]: Finished difference. Result has 255 places, 321 transitions, 2795 flow [2024-06-27 19:48:50,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2540, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2795, PETRI_PLACES=255, PETRI_TRANSITIONS=321} [2024-06-27 19:48:50,608 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 210 predicate places. [2024-06-27 19:48:50,608 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 321 transitions, 2795 flow [2024-06-27 19:48:50,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:50,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:50,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:50,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 19:48:50,608 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:48:50,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:50,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1946813371, now seen corresponding path program 1 times [2024-06-27 19:48:50,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:50,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050632478] [2024-06-27 19:48:50,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:50,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:50,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:51,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:48:51,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:51,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050632478] [2024-06-27 19:48:51,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050632478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:51,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:51,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:48:51,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778880798] [2024-06-27 19:48:51,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:51,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:48:51,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:51,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:48:51,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:48:52,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:48:52,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 321 transitions, 2795 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:52,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:52,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:48:52,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:53,657 INFO L124 PetriNetUnfolderBase]: 3851/5844 cut-off events. [2024-06-27 19:48:53,657 INFO L125 PetriNetUnfolderBase]: For 1457251/1457251 co-relation queries the response was YES. [2024-06-27 19:48:53,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63711 conditions, 5844 events. 3851/5844 cut-off events. For 1457251/1457251 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 31527 event pairs, 873 based on Foata normal form. 4/5827 useless extension candidates. Maximal degree in co-relation 63589. Up to 5351 conditions per place. [2024-06-27 19:48:53,723 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 330 selfloop transitions, 36 changer transitions 0/389 dead transitions. [2024-06-27 19:48:53,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 389 transitions, 4211 flow [2024-06-27 19:48:53,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:48:53,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:48:53,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 240 transitions. [2024-06-27 19:48:53,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 19:48:53,725 INFO L175 Difference]: Start difference. First operand has 255 places, 321 transitions, 2795 flow. Second operand 12 states and 240 transitions. [2024-06-27 19:48:53,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 389 transitions, 4211 flow [2024-06-27 19:48:55,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 389 transitions, 4061 flow, removed 58 selfloop flow, removed 7 redundant places. [2024-06-27 19:48:55,040 INFO L231 Difference]: Finished difference. Result has 261 places, 330 transitions, 2951 flow [2024-06-27 19:48:55,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2648, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2951, PETRI_PLACES=261, PETRI_TRANSITIONS=330} [2024-06-27 19:48:55,040 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 216 predicate places. [2024-06-27 19:48:55,041 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 330 transitions, 2951 flow [2024-06-27 19:48:55,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:55,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:55,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:55,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 19:48:55,041 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:48:55,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:55,042 INFO L85 PathProgramCache]: Analyzing trace with hash 188854161, now seen corresponding path program 2 times [2024-06-27 19:48:55,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:55,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399548793] [2024-06-27 19:48:55,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:55,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:55,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:56,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:48:56,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:56,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399548793] [2024-06-27 19:48:56,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399548793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:56,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:56,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:48:56,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072603871] [2024-06-27 19:48:56,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:56,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:48:56,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:56,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:48:56,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:48:56,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:48:56,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 330 transitions, 2951 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:56,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:56,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:48:56,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:58,059 INFO L124 PetriNetUnfolderBase]: 3854/5849 cut-off events. [2024-06-27 19:48:58,059 INFO L125 PetriNetUnfolderBase]: For 1494300/1494300 co-relation queries the response was YES. [2024-06-27 19:48:58,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64361 conditions, 5849 events. 3854/5849 cut-off events. For 1494300/1494300 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 31660 event pairs, 888 based on Foata normal form. 4/5828 useless extension candidates. Maximal degree in co-relation 64236. Up to 5404 conditions per place. [2024-06-27 19:48:58,128 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 333 selfloop transitions, 31 changer transitions 0/387 dead transitions. [2024-06-27 19:48:58,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 387 transitions, 3887 flow [2024-06-27 19:48:58,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:48:58,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:48:58,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 233 transitions. [2024-06-27 19:48:58,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4412878787878788 [2024-06-27 19:48:58,129 INFO L175 Difference]: Start difference. First operand has 261 places, 330 transitions, 2951 flow. Second operand 12 states and 233 transitions. [2024-06-27 19:48:58,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 387 transitions, 3887 flow [2024-06-27 19:48:59,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 387 transitions, 3743 flow, removed 58 selfloop flow, removed 7 redundant places. [2024-06-27 19:48:59,655 INFO L231 Difference]: Finished difference. Result has 266 places, 332 transitions, 2948 flow [2024-06-27 19:48:59,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2807, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2948, PETRI_PLACES=266, PETRI_TRANSITIONS=332} [2024-06-27 19:48:59,655 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 221 predicate places. [2024-06-27 19:48:59,655 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 332 transitions, 2948 flow [2024-06-27 19:48:59,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:59,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:59,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:59,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 19:48:59,655 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:48:59,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:59,656 INFO L85 PathProgramCache]: Analyzing trace with hash 188974255, now seen corresponding path program 2 times [2024-06-27 19:48:59,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:59,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636272768] [2024-06-27 19:48:59,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:59,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:59,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:49:01,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:49:01,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:49:01,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636272768] [2024-06-27 19:49:01,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636272768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:49:01,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:49:01,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:49:01,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289793926] [2024-06-27 19:49:01,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:49:01,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:49:01,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:49:01,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:49:01,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:49:01,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:49:01,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 332 transitions, 2948 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:49:01,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:49:01,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:49:01,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:49:02,707 INFO L124 PetriNetUnfolderBase]: 3893/5911 cut-off events. [2024-06-27 19:49:02,708 INFO L125 PetriNetUnfolderBase]: For 1538524/1538524 co-relation queries the response was YES. [2024-06-27 19:49:02,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65163 conditions, 5911 events. 3893/5911 cut-off events. For 1538524/1538524 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 32031 event pairs, 881 based on Foata normal form. 4/5892 useless extension candidates. Maximal degree in co-relation 65036. Up to 5473 conditions per place. [2024-06-27 19:49:02,779 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 335 selfloop transitions, 26 changer transitions 0/384 dead transitions. [2024-06-27 19:49:02,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 384 transitions, 3878 flow [2024-06-27 19:49:02,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:49:02,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:49:02,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-27 19:49:02,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44214876033057854 [2024-06-27 19:49:02,780 INFO L175 Difference]: Start difference. First operand has 266 places, 332 transitions, 2948 flow. Second operand 11 states and 214 transitions. [2024-06-27 19:49:02,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 384 transitions, 3878 flow [2024-06-27 19:49:04,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 384 transitions, 3761 flow, removed 31 selfloop flow, removed 10 redundant places. [2024-06-27 19:49:04,145 INFO L231 Difference]: Finished difference. Result has 267 places, 335 transitions, 2977 flow [2024-06-27 19:49:04,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2831, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2977, PETRI_PLACES=267, PETRI_TRANSITIONS=335} [2024-06-27 19:49:04,145 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 222 predicate places. [2024-06-27 19:49:04,145 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 335 transitions, 2977 flow [2024-06-27 19:49:04,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:49:04,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:49:04,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:49:04,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 19:49:04,146 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:49:04,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:49:04,146 INFO L85 PathProgramCache]: Analyzing trace with hash -483446267, now seen corresponding path program 3 times [2024-06-27 19:49:04,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:49:04,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665248693] [2024-06-27 19:49:04,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:49:04,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:49:04,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:49:05,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:49:05,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:49:05,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665248693] [2024-06-27 19:49:05,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665248693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:49:05,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:49:05,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:49:05,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022640441] [2024-06-27 19:49:05,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:49:05,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:49:05,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:49:05,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:49:05,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:49:05,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:49:05,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 335 transitions, 2977 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:49:05,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:49:05,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:49:05,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:49:07,266 INFO L124 PetriNetUnfolderBase]: 3868/5874 cut-off events. [2024-06-27 19:49:07,266 INFO L125 PetriNetUnfolderBase]: For 1548784/1548784 co-relation queries the response was YES. [2024-06-27 19:49:07,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64665 conditions, 5874 events. 3868/5874 cut-off events. For 1548784/1548784 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 31863 event pairs, 886 based on Foata normal form. 4/5853 useless extension candidates. Maximal degree in co-relation 64538. Up to 5448 conditions per place. [2024-06-27 19:49:07,339 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 335 selfloop transitions, 25 changer transitions 0/383 dead transitions. [2024-06-27 19:49:07,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 383 transitions, 3819 flow [2024-06-27 19:49:07,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:49:07,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:49:07,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 212 transitions. [2024-06-27 19:49:07,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380165289256198 [2024-06-27 19:49:07,340 INFO L175 Difference]: Start difference. First operand has 267 places, 335 transitions, 2977 flow. Second operand 11 states and 212 transitions. [2024-06-27 19:49:07,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 383 transitions, 3819 flow [2024-06-27 19:49:09,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 383 transitions, 3645 flow, removed 63 selfloop flow, removed 9 redundant places. [2024-06-27 19:49:09,147 INFO L231 Difference]: Finished difference. Result has 269 places, 335 transitions, 2860 flow [2024-06-27 19:49:09,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2803, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2860, PETRI_PLACES=269, PETRI_TRANSITIONS=335} [2024-06-27 19:49:09,147 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 224 predicate places. [2024-06-27 19:49:09,147 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 335 transitions, 2860 flow [2024-06-27 19:49:09,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:49:09,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:49:09,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:49:09,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 19:49:09,148 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:49:09,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:49:09,148 INFO L85 PathProgramCache]: Analyzing trace with hash -483446143, now seen corresponding path program 3 times [2024-06-27 19:49:09,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:49:09,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925308883] [2024-06-27 19:49:09,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:49:09,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:49:09,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:49:10,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:49:10,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:49:10,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925308883] [2024-06-27 19:49:10,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925308883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:49:10,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:49:10,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:49:10,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493361554] [2024-06-27 19:49:10,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:49:10,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:49:10,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:49:10,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:49:10,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:49:10,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:49:10,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 335 transitions, 2860 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:49:10,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:49:10,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:49:10,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:49:12,041 INFO L124 PetriNetUnfolderBase]: 3875/5885 cut-off events. [2024-06-27 19:49:12,041 INFO L125 PetriNetUnfolderBase]: For 1573867/1573867 co-relation queries the response was YES. [2024-06-27 19:49:12,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64560 conditions, 5885 events. 3875/5885 cut-off events. For 1573867/1573867 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 31928 event pairs, 877 based on Foata normal form. 4/5866 useless extension candidates. Maximal degree in co-relation 64432. Up to 5420 conditions per place. [2024-06-27 19:49:12,115 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 331 selfloop transitions, 31 changer transitions 0/385 dead transitions. [2024-06-27 19:49:12,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 385 transitions, 3716 flow [2024-06-27 19:49:12,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:49:12,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:49:12,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-06-27 19:49:12,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44834710743801653 [2024-06-27 19:49:12,117 INFO L175 Difference]: Start difference. First operand has 269 places, 335 transitions, 2860 flow. Second operand 11 states and 217 transitions. [2024-06-27 19:49:12,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 385 transitions, 3716 flow [2024-06-27 19:49:13,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 385 transitions, 3584 flow, removed 32 selfloop flow, removed 11 redundant places. [2024-06-27 19:49:13,486 INFO L231 Difference]: Finished difference. Result has 269 places, 335 transitions, 2798 flow [2024-06-27 19:49:13,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2728, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2798, PETRI_PLACES=269, PETRI_TRANSITIONS=335} [2024-06-27 19:49:13,487 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 224 predicate places. [2024-06-27 19:49:13,487 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 335 transitions, 2798 flow [2024-06-27 19:49:13,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:49:13,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:49:13,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:49:13,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 19:49:13,487 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:49:13,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:49:13,487 INFO L85 PathProgramCache]: Analyzing trace with hash -367977343, now seen corresponding path program 4 times [2024-06-27 19:49:13,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:49:13,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503056156] [2024-06-27 19:49:13,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:49:13,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:49:13,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:49:15,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:49:15,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:49:15,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503056156] [2024-06-27 19:49:15,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503056156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:49:15,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:49:15,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:49:15,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302034037] [2024-06-27 19:49:15,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:49:15,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:49:15,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:49:15,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:49:15,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:49:15,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:49:15,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 335 transitions, 2798 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:49:15,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:49:15,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:49:15,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:49:16,389 INFO L124 PetriNetUnfolderBase]: 3860/5866 cut-off events. [2024-06-27 19:49:16,389 INFO L125 PetriNetUnfolderBase]: For 1590392/1590395 co-relation queries the response was YES. [2024-06-27 19:49:16,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64368 conditions, 5866 events. 3860/5866 cut-off events. For 1590392/1590395 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 31882 event pairs, 730 based on Foata normal form. 4/5841 useless extension candidates. Maximal degree in co-relation 64239. Up to 4508 conditions per place. [2024-06-27 19:49:16,463 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 210 selfloop transitions, 155 changer transitions 0/388 dead transitions. [2024-06-27 19:49:16,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 388 transitions, 3768 flow [2024-06-27 19:49:16,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:49:16,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:49:16,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 226 transitions. [2024-06-27 19:49:16,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4669421487603306 [2024-06-27 19:49:16,464 INFO L175 Difference]: Start difference. First operand has 269 places, 335 transitions, 2798 flow. Second operand 11 states and 226 transitions. [2024-06-27 19:49:16,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 388 transitions, 3768 flow [2024-06-27 19:49:18,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 388 transitions, 3680 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-27 19:49:18,040 INFO L231 Difference]: Finished difference. Result has 270 places, 338 transitions, 3138 flow [2024-06-27 19:49:18,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2710, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3138, PETRI_PLACES=270, PETRI_TRANSITIONS=338} [2024-06-27 19:49:18,040 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 225 predicate places. [2024-06-27 19:49:18,041 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 338 transitions, 3138 flow [2024-06-27 19:49:18,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:49:18,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:49:18,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:49:18,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 19:49:18,041 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:49:18,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:49:18,041 INFO L85 PathProgramCache]: Analyzing trace with hash -368154973, now seen corresponding path program 5 times [2024-06-27 19:49:18,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:49:18,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674681539] [2024-06-27 19:49:18,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:49:18,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:49:18,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:49:19,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:49:19,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:49:19,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674681539] [2024-06-27 19:49:19,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674681539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:49:19,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:49:19,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:49:19,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978106654] [2024-06-27 19:49:19,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:49:19,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:49:19,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:49:19,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:49:19,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:49:19,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:49:19,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 338 transitions, 3138 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:49:19,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:49:19,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:49:19,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:49:20,942 INFO L124 PetriNetUnfolderBase]: 3926/5958 cut-off events. [2024-06-27 19:49:20,943 INFO L125 PetriNetUnfolderBase]: For 1637400/1637403 co-relation queries the response was YES. [2024-06-27 19:49:20,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66672 conditions, 5958 events. 3926/5958 cut-off events. For 1637400/1637403 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 32330 event pairs, 728 based on Foata normal form. 4/5933 useless extension candidates. Maximal degree in co-relation 66542. Up to 4547 conditions per place. [2024-06-27 19:49:21,021 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 214 selfloop transitions, 160 changer transitions 0/397 dead transitions. [2024-06-27 19:49:21,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 397 transitions, 4150 flow [2024-06-27 19:49:21,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:49:21,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:49:21,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 247 transitions. [2024-06-27 19:49:21,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4678030303030303 [2024-06-27 19:49:21,022 INFO L175 Difference]: Start difference. First operand has 270 places, 338 transitions, 3138 flow. Second operand 12 states and 247 transitions. [2024-06-27 19:49:21,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 397 transitions, 4150 flow [2024-06-27 19:49:23,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 397 transitions, 3746 flow, removed 49 selfloop flow, removed 9 redundant places. [2024-06-27 19:49:23,263 INFO L231 Difference]: Finished difference. Result has 273 places, 341 transitions, 3179 flow [2024-06-27 19:49:23,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2734, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3179, PETRI_PLACES=273, PETRI_TRANSITIONS=341} [2024-06-27 19:49:23,263 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 228 predicate places. [2024-06-27 19:49:23,263 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 341 transitions, 3179 flow [2024-06-27 19:49:23,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:49:23,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:49:23,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:49:23,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 19:49:23,264 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:49:23,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:49:23,264 INFO L85 PathProgramCache]: Analyzing trace with hash -368155097, now seen corresponding path program 4 times [2024-06-27 19:49:23,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:49:23,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205298982] [2024-06-27 19:49:23,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:49:23,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:49:23,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:49:24,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:49:24,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:49:24,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205298982] [2024-06-27 19:49:24,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205298982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:49:24,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:49:24,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:49:24,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561726626] [2024-06-27 19:49:24,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:49:24,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:49:24,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:49:24,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:49:24,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:49:24,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:49:24,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 341 transitions, 3179 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:49:24,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:49:24,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:49:24,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:49:26,007 INFO L124 PetriNetUnfolderBase]: 3919/5957 cut-off events. [2024-06-27 19:49:26,007 INFO L125 PetriNetUnfolderBase]: For 1674424/1674427 co-relation queries the response was YES. [2024-06-27 19:49:26,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67413 conditions, 5957 events. 3919/5957 cut-off events. For 1674424/1674427 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 32451 event pairs, 893 based on Foata normal form. 6/5932 useless extension candidates. Maximal degree in co-relation 67282. Up to 5399 conditions per place. [2024-06-27 19:49:26,084 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 305 selfloop transitions, 60 changer transitions 0/388 dead transitions. [2024-06-27 19:49:26,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 388 transitions, 4125 flow [2024-06-27 19:49:26,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:49:26,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:49:26,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2024-06-27 19:49:26,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44421487603305787 [2024-06-27 19:49:26,085 INFO L175 Difference]: Start difference. First operand has 273 places, 341 transitions, 3179 flow. Second operand 11 states and 215 transitions. [2024-06-27 19:49:26,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 388 transitions, 4125 flow [2024-06-27 19:49:28,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 388 transitions, 3706 flow, removed 52 selfloop flow, removed 10 redundant places. [2024-06-27 19:49:28,984 INFO L231 Difference]: Finished difference. Result has 274 places, 343 transitions, 2993 flow [2024-06-27 19:49:28,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2760, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2993, PETRI_PLACES=274, PETRI_TRANSITIONS=343} [2024-06-27 19:49:28,984 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 229 predicate places. [2024-06-27 19:49:28,984 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 343 transitions, 2993 flow [2024-06-27 19:49:28,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:49:28,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:49:28,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:49:28,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 19:49:28,985 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:49:28,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:49:28,985 INFO L85 PathProgramCache]: Analyzing trace with hash -196082099, now seen corresponding path program 6 times [2024-06-27 19:49:28,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:49:28,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724865908] [2024-06-27 19:49:28,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:49:28,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:49:28,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:49:30,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:49:30,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:49:30,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724865908] [2024-06-27 19:49:30,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724865908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:49:30,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:49:30,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:49:30,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741225559] [2024-06-27 19:49:30,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:49:30,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:49:30,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:49:30,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:49:30,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:49:30,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:49:30,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 343 transitions, 2993 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:49:30,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:49:30,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:49:30,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:49:31,929 INFO L124 PetriNetUnfolderBase]: 3921/5957 cut-off events. [2024-06-27 19:49:31,929 INFO L125 PetriNetUnfolderBase]: For 1700959/1700962 co-relation queries the response was YES. [2024-06-27 19:49:31,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67027 conditions, 5957 events. 3921/5957 cut-off events. For 1700959/1700962 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 32448 event pairs, 773 based on Foata normal form. 4/5932 useless extension candidates. Maximal degree in co-relation 66895. Up to 4599 conditions per place. [2024-06-27 19:49:32,008 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 221 selfloop transitions, 149 changer transitions 0/393 dead transitions. [2024-06-27 19:49:32,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 393 transitions, 3979 flow [2024-06-27 19:49:32,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:49:32,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:49:32,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 224 transitions. [2024-06-27 19:49:32,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4628099173553719 [2024-06-27 19:49:32,009 INFO L175 Difference]: Start difference. First operand has 274 places, 343 transitions, 2993 flow. Second operand 11 states and 224 transitions. [2024-06-27 19:49:32,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 393 transitions, 3979 flow [2024-06-27 19:49:34,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 393 transitions, 3764 flow, removed 49 selfloop flow, removed 9 redundant places. [2024-06-27 19:49:34,741 INFO L231 Difference]: Finished difference. Result has 276 places, 346 transitions, 3208 flow [2024-06-27 19:49:34,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2778, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3208, PETRI_PLACES=276, PETRI_TRANSITIONS=346} [2024-06-27 19:49:34,741 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 231 predicate places. [2024-06-27 19:49:34,741 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 346 transitions, 3208 flow [2024-06-27 19:49:34,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:49:34,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:49:34,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:49:34,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 19:49:34,742 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:49:34,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:49:34,742 INFO L85 PathProgramCache]: Analyzing trace with hash -195835835, now seen corresponding path program 1 times [2024-06-27 19:49:34,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:49:34,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470393276] [2024-06-27 19:49:34,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:49:34,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:49:34,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:49:36,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:49:36,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:49:36,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470393276] [2024-06-27 19:49:36,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470393276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:49:36,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:49:36,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:49:36,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082026567] [2024-06-27 19:49:36,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:49:36,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:49:36,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:49:36,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:49:36,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:49:36,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 19:49:36,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 346 transitions, 3208 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:49:36,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:49:36,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 19:49:36,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:49:37,481 INFO L124 PetriNetUnfolderBase]: 4417/6560 cut-off events. [2024-06-27 19:49:37,481 INFO L125 PetriNetUnfolderBase]: For 1804991/1804994 co-relation queries the response was YES. [2024-06-27 19:49:37,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72929 conditions, 6560 events. 4417/6560 cut-off events. For 1804991/1804994 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 33900 event pairs, 914 based on Foata normal form. 4/6551 useless extension candidates. Maximal degree in co-relation 72796. Up to 5948 conditions per place. [2024-06-27 19:49:37,565 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 307 selfloop transitions, 71 changer transitions 0/393 dead transitions. [2024-06-27 19:49:37,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 393 transitions, 4198 flow [2024-06-27 19:49:37,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:49:37,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:49:37,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-27 19:49:37,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2024-06-27 19:49:37,566 INFO L175 Difference]: Start difference. First operand has 276 places, 346 transitions, 3208 flow. Second operand 10 states and 192 transitions. [2024-06-27 19:49:37,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 393 transitions, 4198 flow [2024-06-27 19:49:39,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 393 transitions, 3788 flow, removed 56 selfloop flow, removed 9 redundant places. [2024-06-27 19:49:39,465 INFO L231 Difference]: Finished difference. Result has 278 places, 351 transitions, 3073 flow [2024-06-27 19:49:39,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2802, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3073, PETRI_PLACES=278, PETRI_TRANSITIONS=351} [2024-06-27 19:49:39,466 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 233 predicate places. [2024-06-27 19:49:39,466 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 351 transitions, 3073 flow [2024-06-27 19:49:39,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:49:39,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:49:39,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:49:39,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 19:49:39,467 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:49:39,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:49:39,467 INFO L85 PathProgramCache]: Analyzing trace with hash 302016931, now seen corresponding path program 7 times [2024-06-27 19:49:39,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:49:39,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124391074] [2024-06-27 19:49:39,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:49:39,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:49:39,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:49:40,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:49:40,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:49:40,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124391074] [2024-06-27 19:49:40,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124391074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:49:40,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:49:40,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:49:40,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990009856] [2024-06-27 19:49:40,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:49:40,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:49:40,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:49:40,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:49:40,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:49:41,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:49:41,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 351 transitions, 3073 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:49:41,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:49:41,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:49:41,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:49:42,280 INFO L124 PetriNetUnfolderBase]: 3977/6057 cut-off events. [2024-06-27 19:49:42,280 INFO L125 PetriNetUnfolderBase]: For 1779894/1779897 co-relation queries the response was YES. [2024-06-27 19:49:42,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68985 conditions, 6057 events. 3977/6057 cut-off events. For 1779894/1779897 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 33076 event pairs, 753 based on Foata normal form. 4/6032 useless extension candidates. Maximal degree in co-relation 68850. Up to 4615 conditions per place. [2024-06-27 19:49:42,358 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 225 selfloop transitions, 159 changer transitions 0/408 dead transitions. [2024-06-27 19:49:42,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 408 transitions, 4581 flow [2024-06-27 19:49:42,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:49:42,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:49:42,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 229 transitions. [2024-06-27 19:49:42,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4731404958677686 [2024-06-27 19:49:42,359 INFO L175 Difference]: Start difference. First operand has 278 places, 351 transitions, 3073 flow. Second operand 11 states and 229 transitions. [2024-06-27 19:49:42,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 408 transitions, 4581 flow [2024-06-27 19:49:45,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 408 transitions, 4352 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-27 19:49:45,040 INFO L231 Difference]: Finished difference. Result has 283 places, 357 transitions, 3504 flow [2024-06-27 19:49:45,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2844, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3504, PETRI_PLACES=283, PETRI_TRANSITIONS=357} [2024-06-27 19:49:45,041 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 238 predicate places. [2024-06-27 19:49:45,041 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 357 transitions, 3504 flow [2024-06-27 19:49:45,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:49:45,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:49:45,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:49:45,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 19:49:45,042 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:49:45,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:49:45,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1775995621, now seen corresponding path program 8 times [2024-06-27 19:49:45,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:49:45,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617282061] [2024-06-27 19:49:45,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:49:45,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:49:45,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:49:46,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:49:46,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:49:46,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617282061] [2024-06-27 19:49:46,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617282061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:49:46,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:49:46,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:49:46,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841708644] [2024-06-27 19:49:46,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:49:46,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:49:46,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:49:46,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:49:46,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:49:46,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:49:46,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 357 transitions, 3504 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:49:46,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:49:46,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:49:46,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:49:48,126 INFO L124 PetriNetUnfolderBase]: 4051/6166 cut-off events. [2024-06-27 19:49:48,126 INFO L125 PetriNetUnfolderBase]: For 1857115/1857118 co-relation queries the response was YES. [2024-06-27 19:49:48,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72348 conditions, 6166 events. 4051/6166 cut-off events. For 1857115/1857118 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 33834 event pairs, 747 based on Foata normal form. 4/6141 useless extension candidates. Maximal degree in co-relation 72211. Up to 4687 conditions per place. [2024-06-27 19:49:48,213 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 233 selfloop transitions, 161 changer transitions 0/418 dead transitions. [2024-06-27 19:49:48,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 418 transitions, 5066 flow [2024-06-27 19:49:48,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:49:48,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:49:48,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 247 transitions. [2024-06-27 19:49:48,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4678030303030303 [2024-06-27 19:49:48,215 INFO L175 Difference]: Start difference. First operand has 283 places, 357 transitions, 3504 flow. Second operand 12 states and 247 transitions. [2024-06-27 19:49:48,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 418 transitions, 5066 flow [2024-06-27 19:49:51,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 418 transitions, 4841 flow, removed 63 selfloop flow, removed 7 redundant places. [2024-06-27 19:49:51,254 INFO L231 Difference]: Finished difference. Result has 288 places, 363 transitions, 3883 flow [2024-06-27 19:49:51,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3279, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3883, PETRI_PLACES=288, PETRI_TRANSITIONS=363} [2024-06-27 19:49:51,255 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 243 predicate places. [2024-06-27 19:49:51,255 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 363 transitions, 3883 flow [2024-06-27 19:49:51,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:49:51,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:49:51,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:49:51,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 19:49:51,255 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:49:51,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:49:51,255 INFO L85 PathProgramCache]: Analyzing trace with hash 302012157, now seen corresponding path program 5 times [2024-06-27 19:49:51,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:49:51,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901734568] [2024-06-27 19:49:51,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:49:51,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:49:51,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:49:52,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:49:52,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:49:52,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901734568] [2024-06-27 19:49:52,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901734568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:49:52,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:49:52,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:49:52,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138904009] [2024-06-27 19:49:52,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:49:52,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:49:52,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:49:52,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:49:52,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:49:52,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:49:52,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 363 transitions, 3883 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:49:52,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:49:52,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:49:52,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:49:54,110 INFO L124 PetriNetUnfolderBase]: 4068/6194 cut-off events. [2024-06-27 19:49:54,110 INFO L125 PetriNetUnfolderBase]: For 1898401/1898404 co-relation queries the response was YES. [2024-06-27 19:49:54,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73902 conditions, 6194 events. 4068/6194 cut-off events. For 1898401/1898404 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 33981 event pairs, 883 based on Foata normal form. 6/6174 useless extension candidates. Maximal degree in co-relation 73763. Up to 5621 conditions per place. [2024-06-27 19:49:54,194 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 325 selfloop transitions, 58 changer transitions 0/407 dead transitions. [2024-06-27 19:49:54,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 407 transitions, 4869 flow [2024-06-27 19:49:54,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:49:54,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:49:54,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 213 transitions. [2024-06-27 19:49:54,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44008264462809915 [2024-06-27 19:49:54,195 INFO L175 Difference]: Start difference. First operand has 288 places, 363 transitions, 3883 flow. Second operand 11 states and 213 transitions. [2024-06-27 19:49:54,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 407 transitions, 4869 flow [2024-06-27 19:49:57,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 407 transitions, 4542 flow, removed 78 selfloop flow, removed 8 redundant places. [2024-06-27 19:49:57,217 INFO L231 Difference]: Finished difference. Result has 291 places, 365 transitions, 3797 flow [2024-06-27 19:49:57,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3556, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3797, PETRI_PLACES=291, PETRI_TRANSITIONS=365} [2024-06-27 19:49:57,218 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 246 predicate places. [2024-06-27 19:49:57,218 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 365 transitions, 3797 flow [2024-06-27 19:49:57,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:49:57,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:49:57,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:49:57,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 19:49:57,218 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:49:57,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:49:57,219 INFO L85 PathProgramCache]: Analyzing trace with hash 302189911, now seen corresponding path program 9 times [2024-06-27 19:49:57,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:49:57,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718347465] [2024-06-27 19:49:57,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:49:57,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:49:57,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:49:58,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:49:58,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:49:58,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718347465] [2024-06-27 19:49:58,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718347465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:49:58,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:49:58,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:49:58,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626484343] [2024-06-27 19:49:58,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:49:58,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:49:58,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:49:58,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:49:58,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:49:58,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:49:58,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 365 transitions, 3797 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:49:58,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:49:58,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:49:58,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:00,079 INFO L124 PetriNetUnfolderBase]: 4082/6213 cut-off events. [2024-06-27 19:50:00,079 INFO L125 PetriNetUnfolderBase]: For 1913774/1913777 co-relation queries the response was YES. [2024-06-27 19:50:00,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73801 conditions, 6213 events. 4082/6213 cut-off events. For 1913774/1913777 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 34019 event pairs, 741 based on Foata normal form. 4/6188 useless extension candidates. Maximal degree in co-relation 73660. Up to 4750 conditions per place. [2024-06-27 19:50:00,164 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 234 selfloop transitions, 158 changer transitions 0/416 dead transitions. [2024-06-27 19:50:00,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 416 transitions, 5091 flow [2024-06-27 19:50:00,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:50:00,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:50:00,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 230 transitions. [2024-06-27 19:50:00,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47520661157024796 [2024-06-27 19:50:00,166 INFO L175 Difference]: Start difference. First operand has 291 places, 365 transitions, 3797 flow. Second operand 11 states and 230 transitions. [2024-06-27 19:50:00,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 416 transitions, 5091 flow [2024-06-27 19:50:02,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 416 transitions, 4788 flow, removed 95 selfloop flow, removed 9 redundant places. [2024-06-27 19:50:02,601 INFO L231 Difference]: Finished difference. Result has 293 places, 365 transitions, 3818 flow [2024-06-27 19:50:02,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3494, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3818, PETRI_PLACES=293, PETRI_TRANSITIONS=365} [2024-06-27 19:50:02,602 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 248 predicate places. [2024-06-27 19:50:02,602 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 365 transitions, 3818 flow [2024-06-27 19:50:02,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:02,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:02,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:02,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 19:50:02,602 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:50:02,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:02,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1936721272, now seen corresponding path program 1 times [2024-06-27 19:50:02,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:02,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321256782] [2024-06-27 19:50:02,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:02,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:02,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:03,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:03,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:03,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321256782] [2024-06-27 19:50:03,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321256782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:03,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:03,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:50:03,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247524623] [2024-06-27 19:50:03,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:03,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:50:03,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:03,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:50:03,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:50:03,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:50:03,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 365 transitions, 3818 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:03,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:03,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:50:03,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:04,754 INFO L124 PetriNetUnfolderBase]: 4163/6319 cut-off events. [2024-06-27 19:50:04,754 INFO L125 PetriNetUnfolderBase]: For 1987560/1987572 co-relation queries the response was YES. [2024-06-27 19:50:04,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76063 conditions, 6319 events. 4163/6319 cut-off events. For 1987560/1987572 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 33927 event pairs, 1000 based on Foata normal form. 12/6290 useless extension candidates. Maximal degree in co-relation 75921. Up to 5837 conditions per place. [2024-06-27 19:50:04,847 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 313 selfloop transitions, 37 changer transitions 0/401 dead transitions. [2024-06-27 19:50:04,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 401 transitions, 4898 flow [2024-06-27 19:50:04,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:50:04,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:50:04,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 19:50:04,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-27 19:50:04,848 INFO L175 Difference]: Start difference. First operand has 293 places, 365 transitions, 3818 flow. Second operand 8 states and 159 transitions. [2024-06-27 19:50:04,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 401 transitions, 4898 flow [2024-06-27 19:50:07,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 401 transitions, 4564 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-27 19:50:07,582 INFO L231 Difference]: Finished difference. Result has 291 places, 371 transitions, 3671 flow [2024-06-27 19:50:07,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3484, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3671, PETRI_PLACES=291, PETRI_TRANSITIONS=371} [2024-06-27 19:50:07,582 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 246 predicate places. [2024-06-27 19:50:07,582 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 371 transitions, 3671 flow [2024-06-27 19:50:07,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:07,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:07,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:07,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 19:50:07,583 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:50:07,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:07,583 INFO L85 PathProgramCache]: Analyzing trace with hash 831302296, now seen corresponding path program 1 times [2024-06-27 19:50:07,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:07,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776034281] [2024-06-27 19:50:07,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:07,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:07,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:08,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:08,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:08,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776034281] [2024-06-27 19:50:08,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776034281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:08,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:08,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:50:08,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334008347] [2024-06-27 19:50:08,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:08,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:50:08,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:08,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:50:08,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:50:08,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:50:08,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 371 transitions, 3671 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:08,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:08,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:50:08,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:09,814 INFO L124 PetriNetUnfolderBase]: 4194/6362 cut-off events. [2024-06-27 19:50:09,815 INFO L125 PetriNetUnfolderBase]: For 2038441/2038453 co-relation queries the response was YES. [2024-06-27 19:50:09,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76472 conditions, 6362 events. 4194/6362 cut-off events. For 2038441/2038453 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 34098 event pairs, 1010 based on Foata normal form. 13/6334 useless extension candidates. Maximal degree in co-relation 76329. Up to 5836 conditions per place. [2024-06-27 19:50:09,904 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 316 selfloop transitions, 40 changer transitions 0/407 dead transitions. [2024-06-27 19:50:09,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 407 transitions, 4763 flow [2024-06-27 19:50:09,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:50:09,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:50:09,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-27 19:50:09,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45738636363636365 [2024-06-27 19:50:09,905 INFO L175 Difference]: Start difference. First operand has 291 places, 371 transitions, 3671 flow. Second operand 8 states and 161 transitions. [2024-06-27 19:50:09,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 407 transitions, 4763 flow [2024-06-27 19:50:13,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 407 transitions, 4673 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-27 19:50:13,253 INFO L231 Difference]: Finished difference. Result has 295 places, 377 transitions, 3769 flow [2024-06-27 19:50:13,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3581, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3769, PETRI_PLACES=295, PETRI_TRANSITIONS=377} [2024-06-27 19:50:13,253 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 250 predicate places. [2024-06-27 19:50:13,254 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 377 transitions, 3769 flow [2024-06-27 19:50:13,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:13,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:13,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:13,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 19:50:13,254 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:50:13,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:13,254 INFO L85 PathProgramCache]: Analyzing trace with hash 831301862, now seen corresponding path program 2 times [2024-06-27 19:50:13,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:13,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738957758] [2024-06-27 19:50:13,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:13,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:13,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:14,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:14,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:14,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738957758] [2024-06-27 19:50:14,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738957758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:14,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:14,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:50:14,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235152469] [2024-06-27 19:50:14,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:14,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:50:14,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:14,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:50:14,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:50:14,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:50:14,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 377 transitions, 3769 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:14,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:14,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:50:14,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:15,482 INFO L124 PetriNetUnfolderBase]: 4197/6369 cut-off events. [2024-06-27 19:50:15,482 INFO L125 PetriNetUnfolderBase]: For 2065848/2065860 co-relation queries the response was YES. [2024-06-27 19:50:15,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77328 conditions, 6369 events. 4197/6369 cut-off events. For 2065848/2065860 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 34206 event pairs, 1007 based on Foata normal form. 11/6339 useless extension candidates. Maximal degree in co-relation 77183. Up to 5886 conditions per place. [2024-06-27 19:50:15,575 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 315 selfloop transitions, 38 changer transitions 0/404 dead transitions. [2024-06-27 19:50:15,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 404 transitions, 4785 flow [2024-06-27 19:50:15,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:50:15,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:50:15,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 19:50:15,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 19:50:15,576 INFO L175 Difference]: Start difference. First operand has 295 places, 377 transitions, 3769 flow. Second operand 8 states and 154 transitions. [2024-06-27 19:50:15,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 404 transitions, 4785 flow [2024-06-27 19:50:18,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 404 transitions, 4703 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-27 19:50:18,837 INFO L231 Difference]: Finished difference. Result has 299 places, 380 transitions, 3811 flow [2024-06-27 19:50:18,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3687, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3811, PETRI_PLACES=299, PETRI_TRANSITIONS=380} [2024-06-27 19:50:18,837 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 254 predicate places. [2024-06-27 19:50:18,837 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 380 transitions, 3811 flow [2024-06-27 19:50:18,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:18,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:18,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:18,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 19:50:18,838 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:50:18,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:18,838 INFO L85 PathProgramCache]: Analyzing trace with hash 836663684, now seen corresponding path program 1 times [2024-06-27 19:50:18,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:18,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751297319] [2024-06-27 19:50:18,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:18,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:18,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:19,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:19,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:19,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751297319] [2024-06-27 19:50:19,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751297319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:19,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:19,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:50:19,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228299722] [2024-06-27 19:50:19,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:19,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:50:19,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:19,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:50:19,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:50:19,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 19:50:19,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 380 transitions, 3811 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:19,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:19,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 19:50:19,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:21,014 INFO L124 PetriNetUnfolderBase]: 4559/6755 cut-off events. [2024-06-27 19:50:21,014 INFO L125 PetriNetUnfolderBase]: For 2127985/2128001 co-relation queries the response was YES. [2024-06-27 19:50:21,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80336 conditions, 6755 events. 4559/6755 cut-off events. For 2127985/2128001 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 34968 event pairs, 1066 based on Foata normal form. 11/6741 useless extension candidates. Maximal degree in co-relation 80189. Up to 6468 conditions per place. [2024-06-27 19:50:21,109 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 352 selfloop transitions, 35 changer transitions 0/410 dead transitions. [2024-06-27 19:50:21,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 410 transitions, 5273 flow [2024-06-27 19:50:21,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:50:21,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:50:21,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-27 19:50:21,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 19:50:21,110 INFO L175 Difference]: Start difference. First operand has 299 places, 380 transitions, 3811 flow. Second operand 7 states and 132 transitions. [2024-06-27 19:50:21,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 410 transitions, 5273 flow [2024-06-27 19:50:24,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 410 transitions, 5188 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 19:50:24,020 INFO L231 Difference]: Finished difference. Result has 301 places, 389 transitions, 4024 flow [2024-06-27 19:50:24,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3726, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4024, PETRI_PLACES=301, PETRI_TRANSITIONS=389} [2024-06-27 19:50:24,020 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 256 predicate places. [2024-06-27 19:50:24,020 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 389 transitions, 4024 flow [2024-06-27 19:50:24,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:24,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:24,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:24,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 19:50:24,021 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:50:24,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:24,021 INFO L85 PathProgramCache]: Analyzing trace with hash 174285116, now seen corresponding path program 2 times [2024-06-27 19:50:24,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:24,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731591581] [2024-06-27 19:50:24,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:24,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:24,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:24,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:24,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:24,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731591581] [2024-06-27 19:50:24,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731591581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:24,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:24,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:50:24,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157053019] [2024-06-27 19:50:24,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:24,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:50:24,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:24,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:50:24,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:50:24,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 19:50:24,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 389 transitions, 4024 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:24,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:24,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 19:50:24,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:26,199 INFO L124 PetriNetUnfolderBase]: 4568/6769 cut-off events. [2024-06-27 19:50:26,200 INFO L125 PetriNetUnfolderBase]: For 2175077/2175093 co-relation queries the response was YES. [2024-06-27 19:50:26,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81338 conditions, 6769 events. 4568/6769 cut-off events. For 2175077/2175093 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 35081 event pairs, 1062 based on Foata normal form. 11/6755 useless extension candidates. Maximal degree in co-relation 81190. Up to 6483 conditions per place. [2024-06-27 19:50:26,295 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 349 selfloop transitions, 41 changer transitions 0/413 dead transitions. [2024-06-27 19:50:26,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 413 transitions, 5428 flow [2024-06-27 19:50:26,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:50:26,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:50:26,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-27 19:50:26,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41883116883116883 [2024-06-27 19:50:26,296 INFO L175 Difference]: Start difference. First operand has 301 places, 389 transitions, 4024 flow. Second operand 7 states and 129 transitions. [2024-06-27 19:50:26,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 413 transitions, 5428 flow [2024-06-27 19:50:28,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 413 transitions, 5292 flow, removed 61 selfloop flow, removed 2 redundant places. [2024-06-27 19:50:28,831 INFO L231 Difference]: Finished difference. Result has 306 places, 395 transitions, 4132 flow [2024-06-27 19:50:28,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3916, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4132, PETRI_PLACES=306, PETRI_TRANSITIONS=395} [2024-06-27 19:50:28,831 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 261 predicate places. [2024-06-27 19:50:28,831 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 395 transitions, 4132 flow [2024-06-27 19:50:28,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:28,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:28,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:28,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 19:50:28,831 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:50:28,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:28,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1210849193, now seen corresponding path program 10 times [2024-06-27 19:50:28,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:28,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280888133] [2024-06-27 19:50:28,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:28,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:28,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:30,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:30,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:30,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280888133] [2024-06-27 19:50:30,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280888133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:30,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:30,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:50:30,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027225856] [2024-06-27 19:50:30,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:30,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:50:30,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:30,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:50:30,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:50:30,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:50:30,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 395 transitions, 4132 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:30,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:30,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:50:30,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:31,835 INFO L124 PetriNetUnfolderBase]: 4181/6350 cut-off events. [2024-06-27 19:50:31,835 INFO L125 PetriNetUnfolderBase]: For 2153893/2153896 co-relation queries the response was YES. [2024-06-27 19:50:31,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78045 conditions, 6350 events. 4181/6350 cut-off events. For 2153893/2153896 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 34684 event pairs, 785 based on Foata normal form. 4/6325 useless extension candidates. Maximal degree in co-relation 77895. Up to 4868 conditions per place. [2024-06-27 19:50:31,928 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 257 selfloop transitions, 156 changer transitions 0/445 dead transitions. [2024-06-27 19:50:31,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 445 transitions, 5610 flow [2024-06-27 19:50:31,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:50:31,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:50:31,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 225 transitions. [2024-06-27 19:50:31,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46487603305785125 [2024-06-27 19:50:31,929 INFO L175 Difference]: Start difference. First operand has 306 places, 395 transitions, 4132 flow. Second operand 11 states and 225 transitions. [2024-06-27 19:50:31,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 445 transitions, 5610 flow [2024-06-27 19:50:34,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 445 transitions, 5505 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-27 19:50:34,825 INFO L231 Difference]: Finished difference. Result has 314 places, 398 transitions, 4493 flow [2024-06-27 19:50:34,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4027, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4493, PETRI_PLACES=314, PETRI_TRANSITIONS=398} [2024-06-27 19:50:34,825 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 269 predicate places. [2024-06-27 19:50:34,825 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 398 transitions, 4493 flow [2024-06-27 19:50:34,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:34,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:34,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:34,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 19:50:34,825 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:50:34,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:34,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1943456093, now seen corresponding path program 11 times [2024-06-27 19:50:34,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:34,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426654720] [2024-06-27 19:50:34,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:34,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:34,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:36,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:36,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:36,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426654720] [2024-06-27 19:50:36,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426654720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:36,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:36,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:50:36,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252581249] [2024-06-27 19:50:36,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:36,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:50:36,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:36,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:50:36,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:50:36,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:50:36,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 398 transitions, 4493 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:36,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:36,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:50:36,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:37,962 INFO L124 PetriNetUnfolderBase]: 4248/6447 cut-off events. [2024-06-27 19:50:37,962 INFO L125 PetriNetUnfolderBase]: For 2236845/2236848 co-relation queries the response was YES. [2024-06-27 19:50:38,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81409 conditions, 6447 events. 4248/6447 cut-off events. For 2236845/2236848 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 35311 event pairs, 766 based on Foata normal form. 4/6427 useless extension candidates. Maximal degree in co-relation 81258. Up to 4945 conditions per place. [2024-06-27 19:50:38,057 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 271 selfloop transitions, 153 changer transitions 0/456 dead transitions. [2024-06-27 19:50:38,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 456 transitions, 6161 flow [2024-06-27 19:50:38,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:50:38,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:50:38,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 245 transitions. [2024-06-27 19:50:38,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4640151515151515 [2024-06-27 19:50:38,058 INFO L175 Difference]: Start difference. First operand has 314 places, 398 transitions, 4493 flow. Second operand 12 states and 245 transitions. [2024-06-27 19:50:38,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 456 transitions, 6161 flow [2024-06-27 19:50:40,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 456 transitions, 5784 flow, removed 67 selfloop flow, removed 8 redundant places. [2024-06-27 19:50:40,915 INFO L231 Difference]: Finished difference. Result has 318 places, 404 transitions, 4729 flow [2024-06-27 19:50:40,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4116, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4729, PETRI_PLACES=318, PETRI_TRANSITIONS=404} [2024-06-27 19:50:40,915 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 273 predicate places. [2024-06-27 19:50:40,915 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 404 transitions, 4729 flow [2024-06-27 19:50:40,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:40,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:40,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:40,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 19:50:40,915 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:50:40,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:40,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1438750343, now seen corresponding path program 12 times [2024-06-27 19:50:40,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:40,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808636223] [2024-06-27 19:50:40,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:40,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:40,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:42,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:42,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:42,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808636223] [2024-06-27 19:50:42,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808636223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:42,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:42,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:50:42,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176280579] [2024-06-27 19:50:42,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:42,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:50:42,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:42,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:50:42,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:50:42,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:50:42,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 404 transitions, 4729 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:42,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:42,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:50:42,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:43,945 INFO L124 PetriNetUnfolderBase]: 4270/6479 cut-off events. [2024-06-27 19:50:43,945 INFO L125 PetriNetUnfolderBase]: For 2282660/2282663 co-relation queries the response was YES. [2024-06-27 19:50:44,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82325 conditions, 6479 events. 4270/6479 cut-off events. For 2282660/2282663 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 35482 event pairs, 780 based on Foata normal form. 4/6459 useless extension candidates. Maximal degree in co-relation 82173. Up to 5002 conditions per place. [2024-06-27 19:50:44,043 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 272 selfloop transitions, 151 changer transitions 0/455 dead transitions. [2024-06-27 19:50:44,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 455 transitions, 6251 flow [2024-06-27 19:50:44,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:50:44,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:50:44,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 228 transitions. [2024-06-27 19:50:44,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47107438016528924 [2024-06-27 19:50:44,044 INFO L175 Difference]: Start difference. First operand has 318 places, 404 transitions, 4729 flow. Second operand 11 states and 228 transitions. [2024-06-27 19:50:44,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 455 transitions, 6251 flow [2024-06-27 19:50:47,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 455 transitions, 5866 flow, removed 112 selfloop flow, removed 8 redundant places. [2024-06-27 19:50:47,549 INFO L231 Difference]: Finished difference. Result has 321 places, 407 transitions, 4812 flow [2024-06-27 19:50:47,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4386, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4812, PETRI_PLACES=321, PETRI_TRANSITIONS=407} [2024-06-27 19:50:47,549 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 276 predicate places. [2024-06-27 19:50:47,549 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 407 transitions, 4812 flow [2024-06-27 19:50:47,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:47,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:47,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:47,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 19:50:47,550 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:50:47,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:47,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1432494233, now seen corresponding path program 13 times [2024-06-27 19:50:47,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:47,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257054643] [2024-06-27 19:50:47,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:47,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:47,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:48,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:48,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:48,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257054643] [2024-06-27 19:50:48,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257054643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:48,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:48,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:50:48,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801931506] [2024-06-27 19:50:48,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:48,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:50:48,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:48,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:50:48,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:50:49,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:50:49,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 407 transitions, 4812 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:49,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:49,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:50:49,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:50,766 INFO L124 PetriNetUnfolderBase]: 4289/6509 cut-off events. [2024-06-27 19:50:50,766 INFO L125 PetriNetUnfolderBase]: For 2295648/2295651 co-relation queries the response was YES. [2024-06-27 19:50:50,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82438 conditions, 6509 events. 4289/6509 cut-off events. For 2295648/2295651 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 35640 event pairs, 775 based on Foata normal form. 4/6489 useless extension candidates. Maximal degree in co-relation 82284. Up to 5010 conditions per place. [2024-06-27 19:50:50,853 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 273 selfloop transitions, 150 changer transitions 0/455 dead transitions. [2024-06-27 19:50:50,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 455 transitions, 6186 flow [2024-06-27 19:50:50,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:50:50,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:50:50,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 229 transitions. [2024-06-27 19:50:50,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4731404958677686 [2024-06-27 19:50:50,854 INFO L175 Difference]: Start difference. First operand has 321 places, 407 transitions, 4812 flow. Second operand 11 states and 229 transitions. [2024-06-27 19:50:50,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 455 transitions, 6186 flow [2024-06-27 19:50:54,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 455 transitions, 5702 flow, removed 93 selfloop flow, removed 9 redundant places. [2024-06-27 19:50:54,170 INFO L231 Difference]: Finished difference. Result has 323 places, 407 transitions, 4636 flow [2024-06-27 19:50:54,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4328, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4636, PETRI_PLACES=323, PETRI_TRANSITIONS=407} [2024-06-27 19:50:54,170 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 278 predicate places. [2024-06-27 19:50:54,170 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 407 transitions, 4636 flow [2024-06-27 19:50:54,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:54,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:54,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:54,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 19:50:54,170 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:50:54,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:54,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1432247969, now seen corresponding path program 2 times [2024-06-27 19:50:54,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:54,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191771183] [2024-06-27 19:50:54,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:54,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:54,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:55,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:55,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:55,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191771183] [2024-06-27 19:50:55,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191771183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:55,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:55,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:50:55,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063530845] [2024-06-27 19:50:55,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:55,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:50:55,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:55,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:50:55,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:50:55,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 19:50:55,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 407 transitions, 4636 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:55,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:55,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 19:50:55,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:57,233 INFO L124 PetriNetUnfolderBase]: 4771/7077 cut-off events. [2024-06-27 19:50:57,233 INFO L125 PetriNetUnfolderBase]: For 2394294/2394297 co-relation queries the response was YES. [2024-06-27 19:50:57,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87166 conditions, 7077 events. 4771/7077 cut-off events. For 2394294/2394297 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 36930 event pairs, 948 based on Foata normal form. 4/7075 useless extension candidates. Maximal degree in co-relation 87011. Up to 6447 conditions per place. [2024-06-27 19:50:57,331 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 363 selfloop transitions, 67 changer transitions 0/453 dead transitions. [2024-06-27 19:50:57,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 453 transitions, 5763 flow [2024-06-27 19:50:57,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:50:57,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:50:57,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-27 19:50:57,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43863636363636366 [2024-06-27 19:50:57,332 INFO L175 Difference]: Start difference. First operand has 323 places, 407 transitions, 4636 flow. Second operand 10 states and 193 transitions. [2024-06-27 19:50:57,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 453 transitions, 5763 flow [2024-06-27 19:51:00,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 453 transitions, 5496 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-27 19:51:00,583 INFO L231 Difference]: Finished difference. Result has 325 places, 412 transitions, 4659 flow [2024-06-27 19:51:00,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4373, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4659, PETRI_PLACES=325, PETRI_TRANSITIONS=412} [2024-06-27 19:51:00,584 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 280 predicate places. [2024-06-27 19:51:00,584 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 412 transitions, 4659 flow [2024-06-27 19:51:00,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:00,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:00,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:51:00,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 19:51:00,585 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:51:00,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:00,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1438928097, now seen corresponding path program 6 times [2024-06-27 19:51:00,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:00,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335874517] [2024-06-27 19:51:00,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:00,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:00,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:01,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:51:01,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:01,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335874517] [2024-06-27 19:51:01,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335874517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:01,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:01,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:51:01,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679370615] [2024-06-27 19:51:01,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:01,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:51:01,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:01,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:51:01,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:51:02,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:51:02,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 412 transitions, 4659 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:02,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:51:02,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:51:02,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:03,637 INFO L124 PetriNetUnfolderBase]: 4301/6537 cut-off events. [2024-06-27 19:51:03,637 INFO L125 PetriNetUnfolderBase]: For 2382920/2382923 co-relation queries the response was YES. [2024-06-27 19:51:03,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83153 conditions, 6537 events. 4301/6537 cut-off events. For 2382920/2382923 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 35989 event pairs, 905 based on Foata normal form. 6/6517 useless extension candidates. Maximal degree in co-relation 82996. Up to 5940 conditions per place. [2024-06-27 19:51:03,741 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 363 selfloop transitions, 57 changer transitions 0/453 dead transitions. [2024-06-27 19:51:03,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 453 transitions, 5723 flow [2024-06-27 19:51:03,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:51:03,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:51:03,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 211 transitions. [2024-06-27 19:51:03,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4359504132231405 [2024-06-27 19:51:03,742 INFO L175 Difference]: Start difference. First operand has 325 places, 412 transitions, 4659 flow. Second operand 11 states and 211 transitions. [2024-06-27 19:51:03,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 453 transitions, 5723 flow [2024-06-27 19:51:07,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 453 transitions, 5484 flow, removed 55 selfloop flow, removed 7 redundant places. [2024-06-27 19:51:07,685 INFO L231 Difference]: Finished difference. Result has 329 places, 414 transitions, 4671 flow [2024-06-27 19:51:07,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4420, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4671, PETRI_PLACES=329, PETRI_TRANSITIONS=414} [2024-06-27 19:51:07,685 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 284 predicate places. [2024-06-27 19:51:07,685 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 414 transitions, 4671 flow [2024-06-27 19:51:07,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:07,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:07,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:51:07,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 19:51:07,686 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:51:07,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:07,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1210602929, now seen corresponding path program 3 times [2024-06-27 19:51:07,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:07,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549064984] [2024-06-27 19:51:07,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:07,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:07,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:09,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:51:09,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:09,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549064984] [2024-06-27 19:51:09,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549064984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:09,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:09,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:51:09,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067578142] [2024-06-27 19:51:09,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:09,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:51:09,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:09,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:51:09,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:51:09,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 19:51:09,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 414 transitions, 4671 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:09,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:51:09,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 19:51:09,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:10,823 INFO L124 PetriNetUnfolderBase]: 4827/7163 cut-off events. [2024-06-27 19:51:10,823 INFO L125 PetriNetUnfolderBase]: For 2489918/2489921 co-relation queries the response was YES. [2024-06-27 19:51:10,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88657 conditions, 7163 events. 4827/7163 cut-off events. For 2489918/2489921 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 37504 event pairs, 948 based on Foata normal form. 4/7161 useless extension candidates. Maximal degree in co-relation 88499. Up to 6520 conditions per place. [2024-06-27 19:51:10,936 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 366 selfloop transitions, 71 changer transitions 0/460 dead transitions. [2024-06-27 19:51:10,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 460 transitions, 5818 flow [2024-06-27 19:51:10,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:51:10,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:51:10,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-27 19:51:10,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2024-06-27 19:51:10,937 INFO L175 Difference]: Start difference. First operand has 329 places, 414 transitions, 4671 flow. Second operand 10 states and 192 transitions. [2024-06-27 19:51:10,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 460 transitions, 5818 flow [2024-06-27 19:51:15,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 460 transitions, 5585 flow, removed 61 selfloop flow, removed 9 redundant places. [2024-06-27 19:51:15,167 INFO L231 Difference]: Finished difference. Result has 331 places, 420 transitions, 4754 flow [2024-06-27 19:51:15,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4438, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4754, PETRI_PLACES=331, PETRI_TRANSITIONS=420} [2024-06-27 19:51:15,167 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 286 predicate places. [2024-06-27 19:51:15,167 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 420 transitions, 4754 flow [2024-06-27 19:51:15,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:15,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:15,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:51:15,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 19:51:15,168 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:51:15,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:15,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1706799179, now seen corresponding path program 4 times [2024-06-27 19:51:15,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:15,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402184001] [2024-06-27 19:51:15,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:15,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:15,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:16,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:51:16,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:16,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402184001] [2024-06-27 19:51:16,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402184001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:16,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:16,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:51:16,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93289969] [2024-06-27 19:51:16,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:16,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:51:16,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:16,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:51:16,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:51:16,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 19:51:16,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 420 transitions, 4754 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:16,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:51:16,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 19:51:16,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:18,367 INFO L124 PetriNetUnfolderBase]: 4844/7190 cut-off events. [2024-06-27 19:51:18,367 INFO L125 PetriNetUnfolderBase]: For 2536116/2536119 co-relation queries the response was YES. [2024-06-27 19:51:18,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89791 conditions, 7190 events. 4844/7190 cut-off events. For 2536116/2536119 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 37634 event pairs, 933 based on Foata normal form. 4/7188 useless extension candidates. Maximal degree in co-relation 89631. Up to 6547 conditions per place. [2024-06-27 19:51:18,462 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 365 selfloop transitions, 75 changer transitions 0/463 dead transitions. [2024-06-27 19:51:18,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 463 transitions, 5889 flow [2024-06-27 19:51:18,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:51:18,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:51:18,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-27 19:51:18,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-27 19:51:18,463 INFO L175 Difference]: Start difference. First operand has 331 places, 420 transitions, 4754 flow. Second operand 10 states and 190 transitions. [2024-06-27 19:51:18,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 463 transitions, 5889 flow [2024-06-27 19:51:23,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 463 transitions, 5630 flow, removed 59 selfloop flow, removed 7 redundant places. [2024-06-27 19:51:23,282 INFO L231 Difference]: Finished difference. Result has 334 places, 424 transitions, 4795 flow [2024-06-27 19:51:23,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4499, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4795, PETRI_PLACES=334, PETRI_TRANSITIONS=424} [2024-06-27 19:51:23,282 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 289 predicate places. [2024-06-27 19:51:23,282 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 424 transitions, 4795 flow [2024-06-27 19:51:23,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:23,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:23,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:51:23,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 19:51:23,283 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:51:23,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:23,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1706788949, now seen corresponding path program 5 times [2024-06-27 19:51:23,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:23,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89515981] [2024-06-27 19:51:23,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:23,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:23,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:24,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:51:24,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:24,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89515981] [2024-06-27 19:51:24,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89515981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:24,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:24,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:51:24,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100879230] [2024-06-27 19:51:24,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:24,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:51:24,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:24,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:51:24,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:51:24,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 19:51:24,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 424 transitions, 4795 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:24,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:51:24,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 19:51:24,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:26,450 INFO L124 PetriNetUnfolderBase]: 4869/7225 cut-off events. [2024-06-27 19:51:26,450 INFO L125 PetriNetUnfolderBase]: For 2594094/2594097 co-relation queries the response was YES. [2024-06-27 19:51:26,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90735 conditions, 7225 events. 4869/7225 cut-off events. For 2594094/2594097 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 37878 event pairs, 929 based on Foata normal form. 4/7213 useless extension candidates. Maximal degree in co-relation 90574. Up to 6491 conditions per place. [2024-06-27 19:51:26,557 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 358 selfloop transitions, 84 changer transitions 0/465 dead transitions. [2024-06-27 19:51:26,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 465 transitions, 5911 flow [2024-06-27 19:51:26,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:51:26,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:51:26,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-27 19:51:26,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-27 19:51:26,558 INFO L175 Difference]: Start difference. First operand has 334 places, 424 transitions, 4795 flow. Second operand 10 states and 190 transitions. [2024-06-27 19:51:26,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 465 transitions, 5911 flow [2024-06-27 19:51:30,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 465 transitions, 5672 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-27 19:51:30,835 INFO L231 Difference]: Finished difference. Result has 338 places, 426 transitions, 4853 flow [2024-06-27 19:51:30,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4556, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4853, PETRI_PLACES=338, PETRI_TRANSITIONS=426} [2024-06-27 19:51:30,836 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 293 predicate places. [2024-06-27 19:51:30,836 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 426 transitions, 4853 flow [2024-06-27 19:51:30,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:30,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:30,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:51:30,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 19:51:30,837 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:51:30,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:30,837 INFO L85 PathProgramCache]: Analyzing trace with hash 843323972, now seen corresponding path program 3 times [2024-06-27 19:51:30,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:30,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317388796] [2024-06-27 19:51:30,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:30,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:30,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:31,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:51:31,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:31,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317388796] [2024-06-27 19:51:31,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317388796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:31,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:31,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:51:31,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548114783] [2024-06-27 19:51:31,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:31,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:51:31,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:31,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:51:31,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:51:31,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:51:31,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 426 transitions, 4853 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:31,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:51:31,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:51:31,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:33,197 INFO L124 PetriNetUnfolderBase]: 4460/6766 cut-off events. [2024-06-27 19:51:33,197 INFO L125 PetriNetUnfolderBase]: For 2596821/2596833 co-relation queries the response was YES. [2024-06-27 19:51:33,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87742 conditions, 6766 events. 4460/6766 cut-off events. For 2596821/2596833 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 36833 event pairs, 1021 based on Foata normal form. 11/6736 useless extension candidates. Maximal degree in co-relation 87580. Up to 6263 conditions per place. [2024-06-27 19:51:33,299 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 350 selfloop transitions, 40 changer transitions 0/447 dead transitions. [2024-06-27 19:51:33,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 447 transitions, 5954 flow [2024-06-27 19:51:33,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:51:33,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:51:33,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 19:51:33,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42329545454545453 [2024-06-27 19:51:33,301 INFO L175 Difference]: Start difference. First operand has 338 places, 426 transitions, 4853 flow. Second operand 8 states and 149 transitions. [2024-06-27 19:51:33,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 447 transitions, 5954 flow [2024-06-27 19:51:37,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 447 transitions, 5675 flow, removed 57 selfloop flow, removed 8 redundant places. [2024-06-27 19:51:37,868 INFO L231 Difference]: Finished difference. Result has 338 places, 429 transitions, 4705 flow [2024-06-27 19:51:37,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4574, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4705, PETRI_PLACES=338, PETRI_TRANSITIONS=429} [2024-06-27 19:51:37,868 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 293 predicate places. [2024-06-27 19:51:37,868 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 429 transitions, 4705 flow [2024-06-27 19:51:37,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:37,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:37,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:51:37,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 19:51:37,868 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:51:37,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:37,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1949101866, now seen corresponding path program 2 times [2024-06-27 19:51:37,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:37,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352677592] [2024-06-27 19:51:37,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:37,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:37,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:38,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:51:38,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:38,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352677592] [2024-06-27 19:51:38,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352677592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:38,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:38,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:51:38,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339049128] [2024-06-27 19:51:38,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:38,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:51:38,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:38,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:51:38,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:51:38,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:51:38,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 429 transitions, 4705 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:38,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:51:38,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:51:38,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:40,360 INFO L124 PetriNetUnfolderBase]: 4499/6810 cut-off events. [2024-06-27 19:51:40,360 INFO L125 PetriNetUnfolderBase]: For 2669178/2669192 co-relation queries the response was YES. [2024-06-27 19:51:40,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88198 conditions, 6810 events. 4499/6810 cut-off events. For 2669178/2669192 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 37058 event pairs, 1026 based on Foata normal form. 15/6777 useless extension candidates. Maximal degree in co-relation 88035. Up to 6256 conditions per place. [2024-06-27 19:51:40,467 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 362 selfloop transitions, 43 changer transitions 0/462 dead transitions. [2024-06-27 19:51:40,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 462 transitions, 6145 flow [2024-06-27 19:51:40,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:51:40,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:51:40,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 19:51:40,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 19:51:40,468 INFO L175 Difference]: Start difference. First operand has 338 places, 429 transitions, 4705 flow. Second operand 8 states and 160 transitions. [2024-06-27 19:51:40,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 462 transitions, 6145 flow [2024-06-27 19:51:43,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 462 transitions, 6057 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 19:51:43,146 INFO L231 Difference]: Finished difference. Result has 341 places, 435 transitions, 4801 flow [2024-06-27 19:51:43,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4617, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4801, PETRI_PLACES=341, PETRI_TRANSITIONS=435} [2024-06-27 19:51:43,146 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 296 predicate places. [2024-06-27 19:51:43,146 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 435 transitions, 4801 flow [2024-06-27 19:51:43,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:43,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:43,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:51:43,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 19:51:43,147 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:51:43,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:43,147 INFO L85 PathProgramCache]: Analyzing trace with hash 843338356, now seen corresponding path program 3 times [2024-06-27 19:51:43,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:43,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502073763] [2024-06-27 19:51:43,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:43,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:43,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:43,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:51:43,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:43,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502073763] [2024-06-27 19:51:43,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502073763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:43,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:43,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:51:43,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993167995] [2024-06-27 19:51:43,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:43,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:51:43,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:43,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:51:43,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:51:44,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:51:44,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 435 transitions, 4801 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:44,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:51:44,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:51:44,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:45,653 INFO L124 PetriNetUnfolderBase]: 4490/6798 cut-off events. [2024-06-27 19:51:45,653 INFO L125 PetriNetUnfolderBase]: For 2690214/2690228 co-relation queries the response was YES. [2024-06-27 19:51:45,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88162 conditions, 6798 events. 4490/6798 cut-off events. For 2690214/2690228 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 36999 event pairs, 1026 based on Foata normal form. 15/6765 useless extension candidates. Maximal degree in co-relation 87998. Up to 6249 conditions per place. [2024-06-27 19:51:45,753 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 358 selfloop transitions, 44 changer transitions 0/459 dead transitions. [2024-06-27 19:51:45,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 459 transitions, 5903 flow [2024-06-27 19:51:45,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:51:45,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:51:45,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 19:51:45,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-27 19:51:45,754 INFO L175 Difference]: Start difference. First operand has 341 places, 435 transitions, 4801 flow. Second operand 8 states and 156 transitions. [2024-06-27 19:51:45,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 459 transitions, 5903 flow [2024-06-27 19:51:49,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 459 transitions, 5785 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-27 19:51:49,192 INFO L231 Difference]: Finished difference. Result has 345 places, 435 transitions, 4777 flow [2024-06-27 19:51:49,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4683, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4777, PETRI_PLACES=345, PETRI_TRANSITIONS=435} [2024-06-27 19:51:49,193 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 300 predicate places. [2024-06-27 19:51:49,193 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 435 transitions, 4777 flow [2024-06-27 19:51:49,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:49,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:49,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:51:49,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 19:51:49,193 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:51:49,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:49,194 INFO L85 PathProgramCache]: Analyzing trace with hash 673942712, now seen corresponding path program 3 times [2024-06-27 19:51:49,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:49,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447838548] [2024-06-27 19:51:49,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:49,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:49,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:49,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:51:49,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:49,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447838548] [2024-06-27 19:51:49,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447838548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:49,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:49,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:51:49,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234627102] [2024-06-27 19:51:49,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:49,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:51:49,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:49,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:51:49,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:51:49,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 19:51:49,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 435 transitions, 4777 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:49,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:51:49,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 19:51:49,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:51,591 INFO L124 PetriNetUnfolderBase]: 4845/7200 cut-off events. [2024-06-27 19:51:51,591 INFO L125 PetriNetUnfolderBase]: For 2703108/2703115 co-relation queries the response was YES. [2024-06-27 19:51:51,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90716 conditions, 7200 events. 4845/7200 cut-off events. For 2703108/2703115 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 37937 event pairs, 1095 based on Foata normal form. 3/7186 useless extension candidates. Maximal degree in co-relation 90551. Up to 6908 conditions per place. [2024-06-27 19:51:51,693 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 396 selfloop transitions, 24 changer transitions 0/452 dead transitions. [2024-06-27 19:51:51,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 452 transitions, 5897 flow [2024-06-27 19:51:51,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:51:51,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:51:51,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 19:51:51,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-27 19:51:51,694 INFO L175 Difference]: Start difference. First operand has 345 places, 435 transitions, 4777 flow. Second operand 7 states and 126 transitions. [2024-06-27 19:51:51,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 452 transitions, 5897 flow [2024-06-27 19:51:56,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 452 transitions, 5783 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-27 19:51:56,261 INFO L231 Difference]: Finished difference. Result has 346 places, 435 transitions, 4717 flow [2024-06-27 19:51:56,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4663, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4717, PETRI_PLACES=346, PETRI_TRANSITIONS=435} [2024-06-27 19:51:56,261 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 301 predicate places. [2024-06-27 19:51:56,262 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 435 transitions, 4717 flow [2024-06-27 19:51:56,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:56,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:56,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:51:56,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 19:51:56,262 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:51:56,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:56,262 INFO L85 PathProgramCache]: Analyzing trace with hash 688227512, now seen corresponding path program 4 times [2024-06-27 19:51:56,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:56,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118422689] [2024-06-27 19:51:56,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:56,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:56,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:56,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:51:56,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:56,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118422689] [2024-06-27 19:51:56,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118422689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:56,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:56,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:51:56,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60287741] [2024-06-27 19:51:56,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:56,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:51:56,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:56,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:51:56,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:51:57,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 19:51:57,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 435 transitions, 4717 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:57,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:51:57,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 19:51:57,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:58,676 INFO L124 PetriNetUnfolderBase]: 4854/7211 cut-off events. [2024-06-27 19:51:58,676 INFO L125 PetriNetUnfolderBase]: For 2745571/2745578 co-relation queries the response was YES. [2024-06-27 19:51:58,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91053 conditions, 7211 events. 4854/7211 cut-off events. For 2745571/2745578 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 37975 event pairs, 1092 based on Foata normal form. 3/7197 useless extension candidates. Maximal degree in co-relation 90887. Up to 6930 conditions per place. [2024-06-27 19:51:58,780 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 400 selfloop transitions, 19 changer transitions 0/451 dead transitions. [2024-06-27 19:51:58,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 451 transitions, 5666 flow [2024-06-27 19:51:58,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:51:58,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:51:58,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-27 19:51:58,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-27 19:51:58,781 INFO L175 Difference]: Start difference. First operand has 346 places, 435 transitions, 4717 flow. Second operand 7 states and 121 transitions. [2024-06-27 19:51:58,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 451 transitions, 5666 flow [2024-06-27 19:52:02,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 451 transitions, 5558 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 19:52:02,895 INFO L231 Difference]: Finished difference. Result has 347 places, 438 transitions, 4738 flow [2024-06-27 19:52:02,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4627, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4738, PETRI_PLACES=347, PETRI_TRANSITIONS=438} [2024-06-27 19:52:02,896 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 302 predicate places. [2024-06-27 19:52:02,896 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 438 transitions, 4738 flow [2024-06-27 19:52:02,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:02,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:52:02,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:52:02,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 19:52:02,896 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:52:02,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:52:02,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1750709820, now seen corresponding path program 5 times [2024-06-27 19:52:02,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:52:02,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989975264] [2024-06-27 19:52:02,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:52:02,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:52:02,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:52:03,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:52:03,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:52:03,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989975264] [2024-06-27 19:52:03,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989975264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:52:03,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:52:03,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:52:03,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462398284] [2024-06-27 19:52:03,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:52:03,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:52:03,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:52:03,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:52:03,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:52:03,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 19:52:03,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 438 transitions, 4738 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:03,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:52:03,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 19:52:03,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:52:05,318 INFO L124 PetriNetUnfolderBase]: 4851/7208 cut-off events. [2024-06-27 19:52:05,319 INFO L125 PetriNetUnfolderBase]: For 2779461/2779471 co-relation queries the response was YES. [2024-06-27 19:52:05,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91185 conditions, 7208 events. 4851/7208 cut-off events. For 2779461/2779471 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 37984 event pairs, 1100 based on Foata normal form. 5/7195 useless extension candidates. Maximal degree in co-relation 91018. Up to 6926 conditions per place. [2024-06-27 19:52:05,424 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 397 selfloop transitions, 19 changer transitions 0/448 dead transitions. [2024-06-27 19:52:05,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 448 transitions, 5594 flow [2024-06-27 19:52:05,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:52:05,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:52:05,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-27 19:52:05,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38311688311688313 [2024-06-27 19:52:05,425 INFO L175 Difference]: Start difference. First operand has 347 places, 438 transitions, 4738 flow. Second operand 7 states and 118 transitions. [2024-06-27 19:52:05,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 448 transitions, 5594 flow [2024-06-27 19:52:09,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 448 transitions, 5480 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-27 19:52:09,599 INFO L231 Difference]: Finished difference. Result has 349 places, 438 transitions, 4668 flow [2024-06-27 19:52:09,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4624, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4668, PETRI_PLACES=349, PETRI_TRANSITIONS=438} [2024-06-27 19:52:09,599 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 304 predicate places. [2024-06-27 19:52:09,600 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 438 transitions, 4668 flow [2024-06-27 19:52:09,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:09,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:52:09,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:52:09,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 19:52:09,600 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:52:09,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:52:09,600 INFO L85 PathProgramCache]: Analyzing trace with hash -479675472, now seen corresponding path program 6 times [2024-06-27 19:52:09,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:52:09,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012470221] [2024-06-27 19:52:09,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:52:09,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:52:09,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:52:10,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:52:10,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:52:10,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012470221] [2024-06-27 19:52:10,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012470221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:52:10,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:52:10,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:52:10,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592761409] [2024-06-27 19:52:10,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:52:10,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:52:10,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:52:10,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:52:10,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:52:10,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 19:52:10,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 438 transitions, 4668 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:10,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:52:10,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 19:52:10,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:52:12,022 INFO L124 PetriNetUnfolderBase]: 4848/7204 cut-off events. [2024-06-27 19:52:12,023 INFO L125 PetriNetUnfolderBase]: For 2814452/2814462 co-relation queries the response was YES. [2024-06-27 19:52:12,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91306 conditions, 7204 events. 4848/7204 cut-off events. For 2814452/2814462 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 37966 event pairs, 1095 based on Foata normal form. 5/7191 useless extension candidates. Maximal degree in co-relation 91138. Up to 6913 conditions per place. [2024-06-27 19:52:12,131 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 389 selfloop transitions, 27 changer transitions 0/448 dead transitions. [2024-06-27 19:52:12,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 448 transitions, 5524 flow [2024-06-27 19:52:12,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:52:12,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:52:12,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-27 19:52:12,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-06-27 19:52:12,132 INFO L175 Difference]: Start difference. First operand has 349 places, 438 transitions, 4668 flow. Second operand 7 states and 119 transitions. [2024-06-27 19:52:12,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 448 transitions, 5524 flow [2024-06-27 19:52:16,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 448 transitions, 5426 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 19:52:16,718 INFO L231 Difference]: Finished difference. Result has 350 places, 438 transitions, 4630 flow [2024-06-27 19:52:16,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4570, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4630, PETRI_PLACES=350, PETRI_TRANSITIONS=438} [2024-06-27 19:52:16,718 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 305 predicate places. [2024-06-27 19:52:16,718 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 438 transitions, 4630 flow [2024-06-27 19:52:16,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:16,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:52:16,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:52:16,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 19:52:16,719 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:52:16,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:52:16,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1263603085, now seen corresponding path program 1 times [2024-06-27 19:52:16,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:52:16,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601329853] [2024-06-27 19:52:16,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:52:16,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:52:16,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:52:17,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:52:17,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:52:17,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601329853] [2024-06-27 19:52:17,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601329853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:52:17,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:52:17,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:52:17,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634991690] [2024-06-27 19:52:17,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:52:17,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:52:17,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:52:17,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:52:17,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:52:18,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 19:52:18,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 438 transitions, 4630 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:18,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:52:18,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 19:52:18,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:52:19,888 INFO L124 PetriNetUnfolderBase]: 4912/7290 cut-off events. [2024-06-27 19:52:19,888 INFO L125 PetriNetUnfolderBase]: For 2865360/2865360 co-relation queries the response was YES. [2024-06-27 19:52:19,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92228 conditions, 7290 events. 4912/7290 cut-off events. For 2865360/2865360 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 38343 event pairs, 1053 based on Foata normal form. 2/7287 useless extension candidates. Maximal degree in co-relation 92059. Up to 6967 conditions per place. [2024-06-27 19:52:19,995 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 419 selfloop transitions, 34 changer transitions 0/478 dead transitions. [2024-06-27 19:52:19,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 478 transitions, 5773 flow [2024-06-27 19:52:19,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:52:19,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:52:19,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-27 19:52:19,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40454545454545454 [2024-06-27 19:52:19,996 INFO L175 Difference]: Start difference. First operand has 350 places, 438 transitions, 4630 flow. Second operand 10 states and 178 transitions. [2024-06-27 19:52:19,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 478 transitions, 5773 flow [2024-06-27 19:52:25,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 478 transitions, 5675 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 19:52:25,467 INFO L231 Difference]: Finished difference. Result has 353 places, 444 transitions, 4771 flow [2024-06-27 19:52:25,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4532, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4771, PETRI_PLACES=353, PETRI_TRANSITIONS=444} [2024-06-27 19:52:25,468 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 308 predicate places. [2024-06-27 19:52:25,468 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 444 transitions, 4771 flow [2024-06-27 19:52:25,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:25,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:52:25,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:52:25,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 19:52:25,468 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:52:25,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:52:25,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1551587017, now seen corresponding path program 6 times [2024-06-27 19:52:25,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:52:25,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144855726] [2024-06-27 19:52:25,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:52:25,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:52:25,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:52:26,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:52:26,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:52:26,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144855726] [2024-06-27 19:52:26,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144855726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:52:26,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:52:26,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:52:26,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301530399] [2024-06-27 19:52:26,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:52:26,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:52:26,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:52:26,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:52:26,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:52:26,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 19:52:26,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 444 transitions, 4771 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:26,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:52:26,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 19:52:26,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:52:28,433 INFO L124 PetriNetUnfolderBase]: 4929/7317 cut-off events. [2024-06-27 19:52:28,433 INFO L125 PetriNetUnfolderBase]: For 2928551/2928551 co-relation queries the response was YES. [2024-06-27 19:52:28,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93212 conditions, 7317 events. 4929/7317 cut-off events. For 2928551/2928551 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 38548 event pairs, 1021 based on Foata normal form. 4/7316 useless extension candidates. Maximal degree in co-relation 93042. Up to 6862 conditions per place. [2024-06-27 19:52:28,550 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 413 selfloop transitions, 47 changer transitions 0/485 dead transitions. [2024-06-27 19:52:28,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 485 transitions, 5958 flow [2024-06-27 19:52:28,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:52:28,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:52:28,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-27 19:52:28,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4159090909090909 [2024-06-27 19:52:28,551 INFO L175 Difference]: Start difference. First operand has 353 places, 444 transitions, 4771 flow. Second operand 10 states and 183 transitions. [2024-06-27 19:52:28,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 485 transitions, 5958 flow [2024-06-27 19:52:34,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 485 transitions, 5810 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-06-27 19:52:34,218 INFO L231 Difference]: Finished difference. Result has 356 places, 449 transitions, 4893 flow [2024-06-27 19:52:34,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4623, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4893, PETRI_PLACES=356, PETRI_TRANSITIONS=449} [2024-06-27 19:52:34,218 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 311 predicate places. [2024-06-27 19:52:34,218 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 449 transitions, 4893 flow [2024-06-27 19:52:34,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:34,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:52:34,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:52:34,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 19:52:34,219 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:52:34,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:52:34,219 INFO L85 PathProgramCache]: Analyzing trace with hash 958297217, now seen corresponding path program 7 times [2024-06-27 19:52:34,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:52:34,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870043990] [2024-06-27 19:52:34,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:52:34,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:52:34,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:52:35,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:52:35,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:52:35,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870043990] [2024-06-27 19:52:35,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870043990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:52:35,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:52:35,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:52:35,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826442955] [2024-06-27 19:52:35,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:52:35,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:52:35,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:52:35,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:52:35,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:52:35,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 19:52:35,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 449 transitions, 4893 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:35,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:52:35,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 19:52:35,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:52:37,467 INFO L124 PetriNetUnfolderBase]: 4971/7383 cut-off events. [2024-06-27 19:52:37,467 INFO L125 PetriNetUnfolderBase]: For 3012427/3012427 co-relation queries the response was YES. [2024-06-27 19:52:37,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95531 conditions, 7383 events. 4971/7383 cut-off events. For 3012427/3012427 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 38979 event pairs, 1060 based on Foata normal form. 4/7382 useless extension candidates. Maximal degree in co-relation 95359. Up to 6994 conditions per place. [2024-06-27 19:52:37,588 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 430 selfloop transitions, 34 changer transitions 0/489 dead transitions. [2024-06-27 19:52:37,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 489 transitions, 6603 flow [2024-06-27 19:52:37,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:52:37,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:52:37,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-27 19:52:37,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-27 19:52:37,589 INFO L175 Difference]: Start difference. First operand has 356 places, 449 transitions, 4893 flow. Second operand 10 states and 180 transitions. [2024-06-27 19:52:37,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 489 transitions, 6603 flow [2024-06-27 19:52:43,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 489 transitions, 6382 flow, removed 66 selfloop flow, removed 7 redundant places. [2024-06-27 19:52:43,037 INFO L231 Difference]: Finished difference. Result has 359 places, 453 transitions, 5004 flow [2024-06-27 19:52:43,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4672, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5004, PETRI_PLACES=359, PETRI_TRANSITIONS=453} [2024-06-27 19:52:43,038 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 314 predicate places. [2024-06-27 19:52:43,038 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 453 transitions, 5004 flow [2024-06-27 19:52:43,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:43,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:52:43,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:52:43,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 19:52:43,038 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:52:43,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:52:43,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1329941977, now seen corresponding path program 8 times [2024-06-27 19:52:43,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:52:43,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008919578] [2024-06-27 19:52:43,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:52:43,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:52:43,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:52:44,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:52:44,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:52:44,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008919578] [2024-06-27 19:52:44,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008919578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:52:44,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:52:44,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:52:44,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481035554] [2024-06-27 19:52:44,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:52:44,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:52:44,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:52:44,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:52:44,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:52:44,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 19:52:44,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 453 transitions, 5004 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:44,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:52:44,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 19:52:44,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:52:45,929 INFO L124 PetriNetUnfolderBase]: 5010/7442 cut-off events. [2024-06-27 19:52:45,929 INFO L125 PetriNetUnfolderBase]: For 3064226/3064226 co-relation queries the response was YES. [2024-06-27 19:52:46,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96284 conditions, 7442 events. 5010/7442 cut-off events. For 3064226/3064226 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 39390 event pairs, 1038 based on Foata normal form. 4/7441 useless extension candidates. Maximal degree in co-relation 96111. Up to 6974 conditions per place. [2024-06-27 19:52:46,054 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 424 selfloop transitions, 47 changer transitions 0/496 dead transitions. [2024-06-27 19:52:46,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 496 transitions, 6243 flow [2024-06-27 19:52:46,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:52:46,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:52:46,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-27 19:52:46,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42272727272727273 [2024-06-27 19:52:46,056 INFO L175 Difference]: Start difference. First operand has 359 places, 453 transitions, 5004 flow. Second operand 10 states and 186 transitions. [2024-06-27 19:52:46,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 496 transitions, 6243 flow [2024-06-27 19:52:51,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 496 transitions, 6055 flow, removed 78 selfloop flow, removed 6 redundant places. [2024-06-27 19:52:51,224 INFO L231 Difference]: Finished difference. Result has 364 places, 459 transitions, 5112 flow [2024-06-27 19:52:51,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4816, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5112, PETRI_PLACES=364, PETRI_TRANSITIONS=459} [2024-06-27 19:52:51,224 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 319 predicate places. [2024-06-27 19:52:51,224 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 459 transitions, 5112 flow [2024-06-27 19:52:51,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:51,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:52:51,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:52:51,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 19:52:51,225 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:52:51,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:52:51,225 INFO L85 PathProgramCache]: Analyzing trace with hash 378178733, now seen corresponding path program 9 times [2024-06-27 19:52:51,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:52:51,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666556430] [2024-06-27 19:52:51,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:52:51,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:52:51,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:52:52,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:52:52,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:52:52,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666556430] [2024-06-27 19:52:52,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666556430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:52:52,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:52:52,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:52:52,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830955256] [2024-06-27 19:52:52,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:52:52,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:52:52,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:52:52,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:52:52,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:52:52,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 19:52:52,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 459 transitions, 5112 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:52,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:52:52,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 19:52:52,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:52:54,564 INFO L124 PetriNetUnfolderBase]: 5027/7469 cut-off events. [2024-06-27 19:52:54,564 INFO L125 PetriNetUnfolderBase]: For 3115103/3115103 co-relation queries the response was YES. [2024-06-27 19:52:54,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97439 conditions, 7469 events. 5027/7469 cut-off events. For 3115103/3115103 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 39594 event pairs, 1050 based on Foata normal form. 4/7468 useless extension candidates. Maximal degree in co-relation 97263. Up to 7001 conditions per place. [2024-06-27 19:52:54,688 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 423 selfloop transitions, 52 changer transitions 0/500 dead transitions. [2024-06-27 19:52:54,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 500 transitions, 6354 flow [2024-06-27 19:52:54,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:52:54,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:52:54,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 194 transitions. [2024-06-27 19:52:54,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40082644628099173 [2024-06-27 19:52:54,689 INFO L175 Difference]: Start difference. First operand has 364 places, 459 transitions, 5112 flow. Second operand 11 states and 194 transitions. [2024-06-27 19:52:54,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 500 transitions, 6354 flow [2024-06-27 19:52:59,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 500 transitions, 6117 flow, removed 71 selfloop flow, removed 7 redundant places. [2024-06-27 19:52:59,110 INFO L231 Difference]: Finished difference. Result has 369 places, 465 transitions, 5177 flow [2024-06-27 19:52:59,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4881, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5177, PETRI_PLACES=369, PETRI_TRANSITIONS=465} [2024-06-27 19:52:59,110 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 324 predicate places. [2024-06-27 19:52:59,110 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 465 transitions, 5177 flow [2024-06-27 19:52:59,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:59,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:52:59,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:52:59,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 19:52:59,111 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:52:59,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:52:59,111 INFO L85 PathProgramCache]: Analyzing trace with hash 147955559, now seen corresponding path program 14 times [2024-06-27 19:52:59,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:52:59,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22652790] [2024-06-27 19:52:59,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:52:59,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:52:59,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:53:00,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:53:00,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:53:00,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22652790] [2024-06-27 19:53:00,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22652790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:53:00,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:53:00,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:53:00,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742199090] [2024-06-27 19:53:00,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:53:00,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:53:00,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:53:00,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:53:00,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:53:00,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:53:00,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 465 transitions, 5177 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:53:00,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:53:00,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:53:00,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:53:02,346 INFO L124 PetriNetUnfolderBase]: 4573/6955 cut-off events. [2024-06-27 19:53:02,346 INFO L125 PetriNetUnfolderBase]: For 3081191/3081191 co-relation queries the response was YES. [2024-06-27 19:53:02,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92749 conditions, 6955 events. 4573/6955 cut-off events. For 3081191/3081191 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 38852 event pairs, 877 based on Foata normal form. 4/6939 useless extension candidates. Maximal degree in co-relation 92571. Up to 6043 conditions per place. [2024-06-27 19:53:02,467 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 392 selfloop transitions, 78 changer transitions 0/508 dead transitions. [2024-06-27 19:53:02,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 508 transitions, 6397 flow [2024-06-27 19:53:02,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:53:02,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:53:02,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 213 transitions. [2024-06-27 19:53:02,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44008264462809915 [2024-06-27 19:53:02,468 INFO L175 Difference]: Start difference. First operand has 369 places, 465 transitions, 5177 flow. Second operand 11 states and 213 transitions. [2024-06-27 19:53:02,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 508 transitions, 6397 flow [2024-06-27 19:53:07,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 508 transitions, 6182 flow, removed 65 selfloop flow, removed 6 redundant places. [2024-06-27 19:53:07,659 INFO L231 Difference]: Finished difference. Result has 374 places, 468 transitions, 5302 flow [2024-06-27 19:53:07,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4962, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5302, PETRI_PLACES=374, PETRI_TRANSITIONS=468} [2024-06-27 19:53:07,659 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 329 predicate places. [2024-06-27 19:53:07,660 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 468 transitions, 5302 flow [2024-06-27 19:53:07,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:53:07,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:53:07,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:53:07,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 19:53:07,660 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:53:07,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:53:07,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1680157545, now seen corresponding path program 10 times [2024-06-27 19:53:07,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:53:07,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361310849] [2024-06-27 19:53:07,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:53:07,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:53:07,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:53:08,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:53:08,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:53:08,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361310849] [2024-06-27 19:53:08,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361310849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:53:08,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:53:08,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:53:08,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176464873] [2024-06-27 19:53:08,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:53:08,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:53:08,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:53:08,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:53:08,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:53:09,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 19:53:09,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 468 transitions, 5302 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:53:09,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:53:09,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 19:53:09,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:53:11,124 INFO L124 PetriNetUnfolderBase]: 5077/7544 cut-off events. [2024-06-27 19:53:11,124 INFO L125 PetriNetUnfolderBase]: For 3217099/3217099 co-relation queries the response was YES. [2024-06-27 19:53:11,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99386 conditions, 7544 events. 5077/7544 cut-off events. For 3217099/3217099 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 40067 event pairs, 1070 based on Foata normal form. 4/7543 useless extension candidates. Maximal degree in co-relation 99207. Up to 7262 conditions per place. [2024-06-27 19:53:11,233 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 455 selfloop transitions, 23 changer transitions 0/503 dead transitions. [2024-06-27 19:53:11,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 503 transitions, 6440 flow [2024-06-27 19:53:11,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:53:11,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:53:11,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-27 19:53:11,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 19:53:11,234 INFO L175 Difference]: Start difference. First operand has 374 places, 468 transitions, 5302 flow. Second operand 10 states and 176 transitions. [2024-06-27 19:53:11,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 503 transitions, 6440 flow [2024-06-27 19:53:16,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 503 transitions, 6124 flow, removed 82 selfloop flow, removed 9 redundant places. [2024-06-27 19:53:16,423 INFO L231 Difference]: Finished difference. Result has 375 places, 470 transitions, 5139 flow [2024-06-27 19:53:16,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4986, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5139, PETRI_PLACES=375, PETRI_TRANSITIONS=470} [2024-06-27 19:53:16,424 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 330 predicate places. [2024-06-27 19:53:16,424 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 470 transitions, 5139 flow [2024-06-27 19:53:16,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:53:16,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:53:16,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:53:16,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 19:53:16,425 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:53:16,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:53:16,425 INFO L85 PathProgramCache]: Analyzing trace with hash 369600599, now seen corresponding path program 15 times [2024-06-27 19:53:16,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:53:16,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824783828] [2024-06-27 19:53:16,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:53:16,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:53:16,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:53:17,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:53:17,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:53:17,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824783828] [2024-06-27 19:53:17,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824783828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:53:17,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:53:17,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:53:17,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111430708] [2024-06-27 19:53:17,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:53:17,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:53:17,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:53:17,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:53:17,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:53:17,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:53:17,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 470 transitions, 5139 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:53:17,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:53:17,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:53:17,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:53:19,792 INFO L124 PetriNetUnfolderBase]: 4628/7039 cut-off events. [2024-06-27 19:53:19,793 INFO L125 PetriNetUnfolderBase]: For 3173803/3173803 co-relation queries the response was YES. [2024-06-27 19:53:19,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93598 conditions, 7039 events. 4628/7039 cut-off events. For 3173803/3173803 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 39410 event pairs, 912 based on Foata normal form. 6/7025 useless extension candidates. Maximal degree in co-relation 93418. Up to 6100 conditions per place. [2024-06-27 19:53:19,910 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 399 selfloop transitions, 76 changer transitions 0/513 dead transitions. [2024-06-27 19:53:19,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 513 transitions, 6375 flow [2024-06-27 19:53:19,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:53:19,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:53:19,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-27 19:53:19,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44214876033057854 [2024-06-27 19:53:19,911 INFO L175 Difference]: Start difference. First operand has 375 places, 470 transitions, 5139 flow. Second operand 11 states and 214 transitions. [2024-06-27 19:53:19,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 513 transitions, 6375 flow [2024-06-27 19:53:26,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 513 transitions, 6248 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-27 19:53:26,834 INFO L231 Difference]: Finished difference. Result has 379 places, 473 transitions, 5354 flow [2024-06-27 19:53:26,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5012, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5354, PETRI_PLACES=379, PETRI_TRANSITIONS=473} [2024-06-27 19:53:26,835 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 334 predicate places. [2024-06-27 19:53:26,835 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 473 transitions, 5354 flow [2024-06-27 19:53:26,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:53:26,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:53:26,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:53:26,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 19:53:26,836 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:53:26,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:53:26,836 INFO L85 PathProgramCache]: Analyzing trace with hash 378188963, now seen corresponding path program 11 times [2024-06-27 19:53:26,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:53:26,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660669604] [2024-06-27 19:53:26,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:53:26,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:53:26,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:53:28,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:53:28,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:53:28,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660669604] [2024-06-27 19:53:28,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660669604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:53:28,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:53:28,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:53:28,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282647433] [2024-06-27 19:53:28,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:53:28,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:53:28,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:53:28,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:53:28,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:53:28,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 19:53:28,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 473 transitions, 5354 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:53:28,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:53:28,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 19:53:28,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:53:30,112 INFO L124 PetriNetUnfolderBase]: 5127/7619 cut-off events. [2024-06-27 19:53:30,112 INFO L125 PetriNetUnfolderBase]: For 3323401/3323401 co-relation queries the response was YES. [2024-06-27 19:53:30,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100966 conditions, 7619 events. 5127/7619 cut-off events. For 3323401/3323401 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 40579 event pairs, 1058 based on Foata normal form. 4/7618 useless extension candidates. Maximal degree in co-relation 100785. Up to 7074 conditions per place. [2024-06-27 19:53:30,249 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 426 selfloop transitions, 59 changer transitions 0/510 dead transitions. [2024-06-27 19:53:30,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 510 transitions, 6574 flow [2024-06-27 19:53:30,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:53:30,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:53:30,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 194 transitions. [2024-06-27 19:53:30,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40082644628099173 [2024-06-27 19:53:30,250 INFO L175 Difference]: Start difference. First operand has 379 places, 473 transitions, 5354 flow. Second operand 11 states and 194 transitions. [2024-06-27 19:53:30,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 510 transitions, 6574 flow [2024-06-27 19:53:36,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 510 transitions, 6256 flow, removed 85 selfloop flow, removed 9 redundant places. [2024-06-27 19:53:36,496 INFO L231 Difference]: Finished difference. Result has 381 places, 475 transitions, 5307 flow [2024-06-27 19:53:36,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5036, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5307, PETRI_PLACES=381, PETRI_TRANSITIONS=475} [2024-06-27 19:53:36,497 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 336 predicate places. [2024-06-27 19:53:36,497 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 475 transitions, 5307 flow [2024-06-27 19:53:36,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:53:36,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:53:36,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:53:36,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 19:53:36,497 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:53:36,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:53:36,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1185816645, now seen corresponding path program 12 times [2024-06-27 19:53:36,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:53:36,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536393433] [2024-06-27 19:53:36,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:53:36,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:53:36,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:53:37,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:53:37,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:53:37,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536393433] [2024-06-27 19:53:37,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536393433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:53:37,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:53:37,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:53:37,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821768630] [2024-06-27 19:53:37,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:53:37,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:53:37,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:53:37,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:53:37,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:53:37,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 19:53:37,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 475 transitions, 5307 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:53:37,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:53:37,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 19:53:37,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:53:39,909 INFO L124 PetriNetUnfolderBase]: 5144/7646 cut-off events. [2024-06-27 19:53:39,910 INFO L125 PetriNetUnfolderBase]: For 3370753/3370753 co-relation queries the response was YES. [2024-06-27 19:53:39,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101261 conditions, 7646 events. 5144/7646 cut-off events. For 3370753/3370753 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 40789 event pairs, 1057 based on Foata normal form. 4/7645 useless extension candidates. Maximal degree in co-relation 101079. Up to 7350 conditions per place. [2024-06-27 19:53:40,045 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 462 selfloop transitions, 23 changer transitions 0/510 dead transitions. [2024-06-27 19:53:40,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 510 transitions, 6505 flow [2024-06-27 19:53:40,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:53:40,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:53:40,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-27 19:53:40,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2024-06-27 19:53:40,046 INFO L175 Difference]: Start difference. First operand has 381 places, 475 transitions, 5307 flow. Second operand 10 states and 175 transitions. [2024-06-27 19:53:40,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 510 transitions, 6505 flow [2024-06-27 19:53:45,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 510 transitions, 6252 flow, removed 69 selfloop flow, removed 9 redundant places. [2024-06-27 19:53:45,873 INFO L231 Difference]: Finished difference. Result has 382 places, 477 transitions, 5257 flow [2024-06-27 19:53:45,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5054, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5257, PETRI_PLACES=382, PETRI_TRANSITIONS=477} [2024-06-27 19:53:45,874 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 337 predicate places. [2024-06-27 19:53:45,874 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 477 transitions, 5257 flow [2024-06-27 19:53:45,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:53:45,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:53:45,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:53:45,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 19:53:45,874 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:53:45,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:53:45,875 INFO L85 PathProgramCache]: Analyzing trace with hash 958286987, now seen corresponding path program 13 times [2024-06-27 19:53:45,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:53:45,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958870784] [2024-06-27 19:53:45,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:53:45,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:53:45,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:53:47,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:53:47,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:53:47,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958870784] [2024-06-27 19:53:47,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958870784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:53:47,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:53:47,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:53:47,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465557107] [2024-06-27 19:53:47,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:53:47,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:53:47,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:53:47,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:53:47,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:53:47,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 19:53:47,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 477 transitions, 5257 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:53:47,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:53:47,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 19:53:47,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:53:49,401 INFO L124 PetriNetUnfolderBase]: 5136/7634 cut-off events. [2024-06-27 19:53:49,401 INFO L125 PetriNetUnfolderBase]: For 3387836/3387836 co-relation queries the response was YES. [2024-06-27 19:53:49,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100697 conditions, 7634 events. 5136/7634 cut-off events. For 3387836/3387836 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 40725 event pairs, 1071 based on Foata normal form. 4/7633 useless extension candidates. Maximal degree in co-relation 100514. Up to 7307 conditions per place. [2024-06-27 19:53:49,533 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 452 selfloop transitions, 33 changer transitions 0/510 dead transitions. [2024-06-27 19:53:49,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 510 transitions, 6313 flow [2024-06-27 19:53:49,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:53:49,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:53:49,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-27 19:53:49,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4022727272727273 [2024-06-27 19:53:49,534 INFO L175 Difference]: Start difference. First operand has 382 places, 477 transitions, 5257 flow. Second operand 10 states and 177 transitions. [2024-06-27 19:53:49,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 510 transitions, 6313 flow [2024-06-27 19:53:54,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 510 transitions, 6042 flow, removed 114 selfloop flow, removed 8 redundant places. [2024-06-27 19:53:54,657 INFO L231 Difference]: Finished difference. Result has 384 places, 477 transitions, 5062 flow [2024-06-27 19:53:54,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4986, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5062, PETRI_PLACES=384, PETRI_TRANSITIONS=477} [2024-06-27 19:53:54,658 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 339 predicate places. [2024-06-27 19:53:54,658 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 477 transitions, 5062 flow [2024-06-27 19:53:54,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:53:54,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:53:54,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:53:54,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 19:53:54,658 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:53:54,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:53:54,659 INFO L85 PathProgramCache]: Analyzing trace with hash -518753141, now seen corresponding path program 14 times [2024-06-27 19:53:54,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:53:54,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918749992] [2024-06-27 19:53:54,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:53:54,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:53:54,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:53:55,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:53:55,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:53:55,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918749992] [2024-06-27 19:53:55,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918749992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:53:55,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:53:55,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:53:55,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334385372] [2024-06-27 19:53:55,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:53:55,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:53:55,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:53:55,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:53:55,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:53:56,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 19:53:56,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 477 transitions, 5062 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:53:56,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:53:56,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 19:53:56,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:53:58,165 INFO L124 PetriNetUnfolderBase]: 5175/7693 cut-off events. [2024-06-27 19:53:58,165 INFO L125 PetriNetUnfolderBase]: For 3435624/3435624 co-relation queries the response was YES. [2024-06-27 19:53:58,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101205 conditions, 7693 events. 5175/7693 cut-off events. For 3435624/3435624 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 41078 event pairs, 1061 based on Foata normal form. 4/7692 useless extension candidates. Maximal degree in co-relation 101021. Up to 7334 conditions per place. [2024-06-27 19:53:58,298 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 459 selfloop transitions, 35 changer transitions 0/519 dead transitions. [2024-06-27 19:53:58,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 519 transitions, 6376 flow [2024-06-27 19:53:58,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:53:58,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:53:58,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-27 19:53:58,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4113636363636364 [2024-06-27 19:53:58,299 INFO L175 Difference]: Start difference. First operand has 384 places, 477 transitions, 5062 flow. Second operand 10 states and 181 transitions. [2024-06-27 19:53:58,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 519 transitions, 6376 flow [2024-06-27 19:54:05,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 519 transitions, 6298 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-27 19:54:05,254 INFO L231 Difference]: Finished difference. Result has 386 places, 485 transitions, 5315 flow [2024-06-27 19:54:05,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4984, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5315, PETRI_PLACES=386, PETRI_TRANSITIONS=485} [2024-06-27 19:54:05,254 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 341 predicate places. [2024-06-27 19:54:05,254 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 485 transitions, 5315 flow [2024-06-27 19:54:05,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:05,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:05,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:05,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 19:54:05,255 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:54:05,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:05,256 INFO L85 PathProgramCache]: Analyzing trace with hash -518742911, now seen corresponding path program 15 times [2024-06-27 19:54:05,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:05,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150343896] [2024-06-27 19:54:05,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:05,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:05,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:06,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:06,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:06,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150343896] [2024-06-27 19:54:06,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150343896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:06,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:06,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:54:06,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207438266] [2024-06-27 19:54:06,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:06,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:54:06,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:06,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:54:06,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:54:06,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 19:54:06,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 485 transitions, 5315 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:06,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:06,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 19:54:06,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:08,687 INFO L124 PetriNetUnfolderBase]: 5192/7720 cut-off events. [2024-06-27 19:54:08,687 INFO L125 PetriNetUnfolderBase]: For 3448951/3448951 co-relation queries the response was YES. [2024-06-27 19:54:08,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102301 conditions, 7720 events. 5192/7720 cut-off events. For 3448951/3448951 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 41286 event pairs, 1066 based on Foata normal form. 4/7719 useless extension candidates. Maximal degree in co-relation 102115. Up to 7296 conditions per place. [2024-06-27 19:54:08,820 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 460 selfloop transitions, 40 changer transitions 0/525 dead transitions. [2024-06-27 19:54:08,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 525 transitions, 7191 flow [2024-06-27 19:54:08,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:54:08,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:54:08,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-27 19:54:08,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4159090909090909 [2024-06-27 19:54:08,821 INFO L175 Difference]: Start difference. First operand has 386 places, 485 transitions, 5315 flow. Second operand 10 states and 183 transitions. [2024-06-27 19:54:08,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 525 transitions, 7191 flow [2024-06-27 19:54:14,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 525 transitions, 6972 flow, removed 88 selfloop flow, removed 5 redundant places. [2024-06-27 19:54:14,593 INFO L231 Difference]: Finished difference. Result has 391 places, 489 transitions, 5495 flow [2024-06-27 19:54:14,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5096, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5495, PETRI_PLACES=391, PETRI_TRANSITIONS=489} [2024-06-27 19:54:14,593 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 346 predicate places. [2024-06-27 19:54:14,593 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 489 transitions, 5495 flow [2024-06-27 19:54:14,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:14,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:14,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:14,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 19:54:14,594 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:54:14,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:14,594 INFO L85 PathProgramCache]: Analyzing trace with hash -527085011, now seen corresponding path program 16 times [2024-06-27 19:54:14,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:14,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213081601] [2024-06-27 19:54:14,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:14,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:14,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:15,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:15,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:15,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213081601] [2024-06-27 19:54:15,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213081601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:15,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:15,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:54:15,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531277947] [2024-06-27 19:54:15,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:15,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:54:15,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:15,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:54:15,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:54:16,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 19:54:16,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 489 transitions, 5495 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:16,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:16,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 19:54:16,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:18,043 INFO L124 PetriNetUnfolderBase]: 5184/7708 cut-off events. [2024-06-27 19:54:18,044 INFO L125 PetriNetUnfolderBase]: For 3463413/3463413 co-relation queries the response was YES. [2024-06-27 19:54:18,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101417 conditions, 7708 events. 5184/7708 cut-off events. For 3463413/3463413 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 41152 event pairs, 1059 based on Foata normal form. 4/7707 useless extension candidates. Maximal degree in co-relation 101230. Up to 7349 conditions per place. [2024-06-27 19:54:18,185 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 462 selfloop transitions, 36 changer transitions 0/523 dead transitions. [2024-06-27 19:54:18,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 523 transitions, 6581 flow [2024-06-27 19:54:18,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:54:18,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:54:18,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-27 19:54:18,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-27 19:54:18,186 INFO L175 Difference]: Start difference. First operand has 391 places, 489 transitions, 5495 flow. Second operand 10 states and 180 transitions. [2024-06-27 19:54:18,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 523 transitions, 6581 flow [2024-06-27 19:54:23,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 523 transitions, 6248 flow, removed 147 selfloop flow, removed 6 redundant places. [2024-06-27 19:54:23,548 INFO L231 Difference]: Finished difference. Result has 395 places, 489 transitions, 5241 flow [2024-06-27 19:54:23,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5162, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5241, PETRI_PLACES=395, PETRI_TRANSITIONS=489} [2024-06-27 19:54:23,549 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 350 predicate places. [2024-06-27 19:54:23,549 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 489 transitions, 5241 flow [2024-06-27 19:54:23,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:23,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:23,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:23,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-27 19:54:23,549 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:54:23,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:23,550 INFO L85 PathProgramCache]: Analyzing trace with hash -527331275, now seen corresponding path program 16 times [2024-06-27 19:54:23,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:23,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053247315] [2024-06-27 19:54:23,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:23,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:23,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:24,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:24,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:24,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053247315] [2024-06-27 19:54:24,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053247315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:24,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:24,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:54:24,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171246308] [2024-06-27 19:54:24,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:24,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:54:24,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:24,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:54:24,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:54:25,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:54:25,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 489 transitions, 5241 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:25,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:25,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:54:25,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:26,865 INFO L124 PetriNetUnfolderBase]: 4734/7204 cut-off events. [2024-06-27 19:54:26,865 INFO L125 PetriNetUnfolderBase]: For 3408778/3408778 co-relation queries the response was YES. [2024-06-27 19:54:26,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95919 conditions, 7204 events. 4734/7204 cut-off events. For 3408778/3408778 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 40559 event pairs, 918 based on Foata normal form. 6/7190 useless extension candidates. Maximal degree in co-relation 95730. Up to 6497 conditions per place. [2024-06-27 19:54:27,002 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 435 selfloop transitions, 59 changer transitions 0/533 dead transitions. [2024-06-27 19:54:27,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 533 transitions, 7013 flow [2024-06-27 19:54:27,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:54:27,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:54:27,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 208 transitions. [2024-06-27 19:54:27,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4297520661157025 [2024-06-27 19:54:27,003 INFO L175 Difference]: Start difference. First operand has 395 places, 489 transitions, 5241 flow. Second operand 11 states and 208 transitions. [2024-06-27 19:54:27,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 533 transitions, 7013 flow [2024-06-27 19:54:33,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 533 transitions, 6913 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-27 19:54:33,450 INFO L231 Difference]: Finished difference. Result has 396 places, 492 transitions, 5464 flow [2024-06-27 19:54:33,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5141, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5464, PETRI_PLACES=396, PETRI_TRANSITIONS=492} [2024-06-27 19:54:33,450 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 351 predicate places. [2024-06-27 19:54:33,450 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 492 transitions, 5464 flow [2024-06-27 19:54:33,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:33,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:33,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:33,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-27 19:54:33,450 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:54:33,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:33,451 INFO L85 PathProgramCache]: Analyzing trace with hash 141521819, now seen corresponding path program 17 times [2024-06-27 19:54:33,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:33,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709945109] [2024-06-27 19:54:33,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:33,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:33,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:34,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:34,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:34,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709945109] [2024-06-27 19:54:34,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709945109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:34,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:34,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:54:34,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745179879] [2024-06-27 19:54:34,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:34,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:54:34,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:34,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:54:34,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:54:35,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:54:35,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 492 transitions, 5464 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:35,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:35,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:54:35,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:37,326 INFO L124 PetriNetUnfolderBase]: 4767/7252 cut-off events. [2024-06-27 19:54:37,327 INFO L125 PetriNetUnfolderBase]: For 3456843/3456843 co-relation queries the response was YES. [2024-06-27 19:54:37,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97646 conditions, 7252 events. 4767/7252 cut-off events. For 3456843/3456843 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 40824 event pairs, 876 based on Foata normal form. 4/7236 useless extension candidates. Maximal degree in co-relation 97457. Up to 6159 conditions per place. [2024-06-27 19:54:37,439 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 402 selfloop transitions, 107 changer transitions 0/548 dead transitions. [2024-06-27 19:54:37,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 548 transitions, 7689 flow [2024-06-27 19:54:37,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:54:37,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:54:37,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 232 transitions. [2024-06-27 19:54:37,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-27 19:54:37,440 INFO L175 Difference]: Start difference. First operand has 396 places, 492 transitions, 5464 flow. Second operand 12 states and 232 transitions. [2024-06-27 19:54:37,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 548 transitions, 7689 flow [2024-06-27 19:54:44,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 548 transitions, 6939 flow, removed 195 selfloop flow, removed 11 redundant places. [2024-06-27 19:54:44,015 INFO L231 Difference]: Finished difference. Result has 398 places, 501 transitions, 5560 flow [2024-06-27 19:54:44,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4901, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5560, PETRI_PLACES=398, PETRI_TRANSITIONS=501} [2024-06-27 19:54:44,016 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 353 predicate places. [2024-06-27 19:54:44,016 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 501 transitions, 5560 flow [2024-06-27 19:54:44,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:44,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:44,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:44,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-27 19:54:44,016 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:54:44,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:44,016 INFO L85 PathProgramCache]: Analyzing trace with hash 141521695, now seen corresponding path program 7 times [2024-06-27 19:54:44,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:44,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877846597] [2024-06-27 19:54:44,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:44,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:44,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:45,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:45,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:45,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877846597] [2024-06-27 19:54:45,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877846597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:45,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:45,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:54:45,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880576727] [2024-06-27 19:54:45,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:45,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:54:45,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:45,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:54:45,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:54:45,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:54:45,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 501 transitions, 5560 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:45,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:45,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:54:45,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:47,672 INFO L124 PetriNetUnfolderBase]: 4759/7240 cut-off events. [2024-06-27 19:54:47,672 INFO L125 PetriNetUnfolderBase]: For 3460662/3460662 co-relation queries the response was YES. [2024-06-27 19:54:47,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96868 conditions, 7240 events. 4759/7240 cut-off events. For 3460662/3460662 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 40753 event pairs, 951 based on Foata normal form. 4/7224 useless extension candidates. Maximal degree in co-relation 96677. Up to 6772 conditions per place. [2024-06-27 19:54:47,791 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 473 selfloop transitions, 26 changer transitions 0/538 dead transitions. [2024-06-27 19:54:47,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 538 transitions, 6806 flow [2024-06-27 19:54:47,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:54:47,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:54:47,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 200 transitions. [2024-06-27 19:54:47,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4132231404958678 [2024-06-27 19:54:47,792 INFO L175 Difference]: Start difference. First operand has 398 places, 501 transitions, 5560 flow. Second operand 11 states and 200 transitions. [2024-06-27 19:54:47,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 538 transitions, 6806 flow [2024-06-27 19:54:55,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 538 transitions, 6447 flow, removed 121 selfloop flow, removed 8 redundant places. [2024-06-27 19:54:55,629 INFO L231 Difference]: Finished difference. Result has 401 places, 503 transitions, 5424 flow [2024-06-27 19:54:55,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5201, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5424, PETRI_PLACES=401, PETRI_TRANSITIONS=503} [2024-06-27 19:54:55,630 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 356 predicate places. [2024-06-27 19:54:55,630 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 503 transitions, 5424 flow [2024-06-27 19:54:55,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:55,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:55,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:55,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-27 19:54:55,630 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:54:55,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:55,631 INFO L85 PathProgramCache]: Analyzing trace with hash 141699449, now seen corresponding path program 18 times [2024-06-27 19:54:55,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:55,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141258387] [2024-06-27 19:54:55,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:55,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:55,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:56,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:56,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:56,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141258387] [2024-06-27 19:54:56,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141258387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:56,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:56,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:54:56,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455574032] [2024-06-27 19:54:56,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:56,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:54:56,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:56,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:54:56,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:54:57,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:54:57,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 503 transitions, 5424 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:57,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:57,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:54:57,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:59,349 INFO L124 PetriNetUnfolderBase]: 4749/7226 cut-off events. [2024-06-27 19:54:59,350 INFO L125 PetriNetUnfolderBase]: For 3467775/3467775 co-relation queries the response was YES. [2024-06-27 19:54:59,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95895 conditions, 7226 events. 4749/7226 cut-off events. For 3467775/3467775 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 40721 event pairs, 874 based on Foata normal form. 4/7210 useless extension candidates. Maximal degree in co-relation 95702. Up to 6272 conditions per place. [2024-06-27 19:54:59,544 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 416 selfloop transitions, 88 changer transitions 0/543 dead transitions. [2024-06-27 19:54:59,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 543 transitions, 6542 flow [2024-06-27 19:54:59,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:54:59,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:54:59,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 212 transitions. [2024-06-27 19:54:59,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380165289256198 [2024-06-27 19:54:59,545 INFO L175 Difference]: Start difference. First operand has 401 places, 503 transitions, 5424 flow. Second operand 11 states and 212 transitions. [2024-06-27 19:54:59,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 543 transitions, 6542 flow [2024-06-27 19:55:07,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 543 transitions, 6221 flow, removed 136 selfloop flow, removed 9 redundant places. [2024-06-27 19:55:07,936 INFO L231 Difference]: Finished difference. Result has 403 places, 503 transitions, 5287 flow [2024-06-27 19:55:07,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5103, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5287, PETRI_PLACES=403, PETRI_TRANSITIONS=503} [2024-06-27 19:55:07,936 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 358 predicate places. [2024-06-27 19:55:07,936 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 503 transitions, 5287 flow [2024-06-27 19:55:07,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:07,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:07,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:07,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-27 19:55:07,937 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:55:07,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:07,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1487405878, now seen corresponding path program 4 times [2024-06-27 19:55:07,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:07,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566449423] [2024-06-27 19:55:07,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:07,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:07,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:08,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:08,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:08,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566449423] [2024-06-27 19:55:08,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566449423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:08,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:08,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:55:08,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368739565] [2024-06-27 19:55:08,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:08,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:55:08,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:08,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:55:08,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:55:08,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:55:08,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 503 transitions, 5287 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:08,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:08,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:55:08,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:10,861 INFO L124 PetriNetUnfolderBase]: 4871/7368 cut-off events. [2024-06-27 19:55:10,861 INFO L125 PetriNetUnfolderBase]: For 3622089/3622101 co-relation queries the response was YES. [2024-06-27 19:55:10,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99038 conditions, 7368 events. 4871/7368 cut-off events. For 3622089/3622101 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 40643 event pairs, 1063 based on Foata normal form. 15/7338 useless extension candidates. Maximal degree in co-relation 98844. Up to 6897 conditions per place. [2024-06-27 19:55:10,999 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 441 selfloop transitions, 18 changer transitions 0/520 dead transitions. [2024-06-27 19:55:10,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 520 transitions, 6293 flow [2024-06-27 19:55:11,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:55:11,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:55:11,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 19:55:11,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2024-06-27 19:55:11,000 INFO L175 Difference]: Start difference. First operand has 403 places, 503 transitions, 5287 flow. Second operand 8 states and 140 transitions. [2024-06-27 19:55:11,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 520 transitions, 6293 flow [2024-06-27 19:55:18,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 520 transitions, 6099 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-27 19:55:18,738 INFO L231 Difference]: Finished difference. Result has 402 places, 506 transitions, 5193 flow [2024-06-27 19:55:18,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5093, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5193, PETRI_PLACES=402, PETRI_TRANSITIONS=506} [2024-06-27 19:55:18,739 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 357 predicate places. [2024-06-27 19:55:18,739 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 506 transitions, 5193 flow [2024-06-27 19:55:18,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:18,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:18,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:18,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-27 19:55:18,739 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:55:18,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:18,740 INFO L85 PathProgramCache]: Analyzing trace with hash 894709070, now seen corresponding path program 1 times [2024-06-27 19:55:18,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:18,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132069126] [2024-06-27 19:55:18,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:18,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:18,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:19,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:19,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:19,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132069126] [2024-06-27 19:55:19,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132069126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:19,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:19,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:55:19,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442185877] [2024-06-27 19:55:19,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:19,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:55:19,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:19,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:55:19,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:55:19,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 19:55:19,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 506 transitions, 5193 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:19,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:19,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 19:55:19,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:21,818 INFO L124 PetriNetUnfolderBase]: 4610/7085 cut-off events. [2024-06-27 19:55:21,818 INFO L125 PetriNetUnfolderBase]: For 3635219/3635251 co-relation queries the response was YES. [2024-06-27 19:55:21,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96480 conditions, 7085 events. 4610/7085 cut-off events. For 3635219/3635251 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 40019 event pairs, 1032 based on Foata normal form. 14/7036 useless extension candidates. Maximal degree in co-relation 96285. Up to 6305 conditions per place. [2024-06-27 19:55:21,932 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 396 selfloop transitions, 18 changer transitions 0/521 dead transitions. [2024-06-27 19:55:21,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 521 transitions, 6113 flow [2024-06-27 19:55:21,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:55:21,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:55:21,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 19:55:21,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119318181818182 [2024-06-27 19:55:21,933 INFO L175 Difference]: Start difference. First operand has 402 places, 506 transitions, 5193 flow. Second operand 8 states and 145 transitions. [2024-06-27 19:55:21,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 521 transitions, 6113 flow [2024-06-27 19:55:27,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 521 transitions, 6047 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 19:55:27,802 INFO L231 Difference]: Finished difference. Result has 404 places, 509 transitions, 5239 flow [2024-06-27 19:55:27,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5127, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5239, PETRI_PLACES=404, PETRI_TRANSITIONS=509} [2024-06-27 19:55:27,802 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 359 predicate places. [2024-06-27 19:55:27,802 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 509 transitions, 5239 flow [2024-06-27 19:55:27,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:27,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:27,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:27,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-27 19:55:27,803 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:55:27,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:27,803 INFO L85 PathProgramCache]: Analyzing trace with hash 878519134, now seen corresponding path program 5 times [2024-06-27 19:55:27,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:27,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735354573] [2024-06-27 19:55:27,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:27,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:27,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:28,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:28,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:28,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735354573] [2024-06-27 19:55:28,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735354573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:28,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:28,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:55:28,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482046047] [2024-06-27 19:55:28,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:28,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:55:28,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:28,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:55:28,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:55:28,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:55:28,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 509 transitions, 5239 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:28,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:28,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:55:28,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:30,780 INFO L124 PetriNetUnfolderBase]: 4882/7383 cut-off events. [2024-06-27 19:55:30,780 INFO L125 PetriNetUnfolderBase]: For 3696607/3696619 co-relation queries the response was YES. [2024-06-27 19:55:30,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99346 conditions, 7383 events. 4882/7383 cut-off events. For 3696607/3696619 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 40662 event pairs, 1060 based on Foata normal form. 15/7353 useless extension candidates. Maximal degree in co-relation 99150. Up to 6868 conditions per place. [2024-06-27 19:55:31,011 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 438 selfloop transitions, 30 changer transitions 0/529 dead transitions. [2024-06-27 19:55:31,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 529 transitions, 6561 flow [2024-06-27 19:55:31,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:55:31,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:55:31,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 19:55:31,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41761363636363635 [2024-06-27 19:55:31,012 INFO L175 Difference]: Start difference. First operand has 404 places, 509 transitions, 5239 flow. Second operand 8 states and 147 transitions. [2024-06-27 19:55:31,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 529 transitions, 6561 flow [2024-06-27 19:55:38,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 529 transitions, 6465 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-27 19:55:38,682 INFO L231 Difference]: Finished difference. Result has 406 places, 512 transitions, 5267 flow [2024-06-27 19:55:38,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5143, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5267, PETRI_PLACES=406, PETRI_TRANSITIONS=512} [2024-06-27 19:55:38,682 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 361 predicate places. [2024-06-27 19:55:38,682 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 512 transitions, 5267 flow [2024-06-27 19:55:38,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:38,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:38,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:38,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-27 19:55:38,683 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:55:38,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:38,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1503074518, now seen corresponding path program 6 times [2024-06-27 19:55:38,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:38,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823823289] [2024-06-27 19:55:38,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:38,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:38,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:39,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:39,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:39,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823823289] [2024-06-27 19:55:39,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823823289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:39,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:39,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:55:39,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131559660] [2024-06-27 19:55:39,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:39,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:55:39,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:39,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:55:39,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:55:39,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:55:39,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 512 transitions, 5267 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:39,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:39,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:55:39,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:41,604 INFO L124 PetriNetUnfolderBase]: 4869/7367 cut-off events. [2024-06-27 19:55:41,604 INFO L125 PetriNetUnfolderBase]: For 3716217/3716229 co-relation queries the response was YES. [2024-06-27 19:55:41,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99112 conditions, 7367 events. 4869/7367 cut-off events. For 3716217/3716229 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 40631 event pairs, 1052 based on Foata normal form. 15/7337 useless extension candidates. Maximal degree in co-relation 98915. Up to 6861 conditions per place. [2024-06-27 19:55:41,718 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 436 selfloop transitions, 31 changer transitions 0/528 dead transitions. [2024-06-27 19:55:41,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 528 transitions, 6243 flow [2024-06-27 19:55:41,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:55:41,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:55:41,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 19:55:41,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119318181818182 [2024-06-27 19:55:41,719 INFO L175 Difference]: Start difference. First operand has 406 places, 512 transitions, 5267 flow. Second operand 8 states and 145 transitions. [2024-06-27 19:55:41,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 528 transitions, 6243 flow [2024-06-27 19:55:50,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 528 transitions, 6065 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-27 19:55:50,511 INFO L231 Difference]: Finished difference. Result has 407 places, 512 transitions, 5157 flow [2024-06-27 19:55:50,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5089, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5157, PETRI_PLACES=407, PETRI_TRANSITIONS=512} [2024-06-27 19:55:50,511 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 362 predicate places. [2024-06-27 19:55:50,511 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 512 transitions, 5157 flow [2024-06-27 19:55:50,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:50,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:50,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:50,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-27 19:55:50,512 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:55:50,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:50,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1503074952, now seen corresponding path program 4 times [2024-06-27 19:55:50,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:50,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34195300] [2024-06-27 19:55:50,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:50,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:50,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:51,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:51,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:51,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34195300] [2024-06-27 19:55:51,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34195300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:51,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:51,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:55:51,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326183824] [2024-06-27 19:55:51,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:51,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:55:51,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:51,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:55:51,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:55:51,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:55:51,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 512 transitions, 5157 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:51,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:51,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:55:51,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:53,524 INFO L124 PetriNetUnfolderBase]: 4867/7363 cut-off events. [2024-06-27 19:55:53,525 INFO L125 PetriNetUnfolderBase]: For 3731641/3731653 co-relation queries the response was YES. [2024-06-27 19:55:53,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98909 conditions, 7363 events. 4867/7363 cut-off events. For 3731641/3731653 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 40592 event pairs, 1061 based on Foata normal form. 14/7332 useless extension candidates. Maximal degree in co-relation 98711. Up to 6907 conditions per place. [2024-06-27 19:55:53,645 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 443 selfloop transitions, 18 changer transitions 0/522 dead transitions. [2024-06-27 19:55:53,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 522 transitions, 6103 flow [2024-06-27 19:55:53,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:55:53,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:55:53,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 19:55:53,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-06-27 19:55:53,646 INFO L175 Difference]: Start difference. First operand has 407 places, 512 transitions, 5157 flow. Second operand 8 states and 136 transitions. [2024-06-27 19:55:53,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 522 transitions, 6103 flow [2024-06-27 19:56:00,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 522 transitions, 5989 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-27 19:56:00,605 INFO L231 Difference]: Finished difference. Result has 407 places, 512 transitions, 5085 flow [2024-06-27 19:56:00,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5043, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5085, PETRI_PLACES=407, PETRI_TRANSITIONS=512} [2024-06-27 19:56:00,606 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 362 predicate places. [2024-06-27 19:56:00,606 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 512 transitions, 5085 flow [2024-06-27 19:56:00,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:00,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:00,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:00,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-27 19:56:00,606 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:00,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:00,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1699765244, now seen corresponding path program 1 times [2024-06-27 19:56:00,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:00,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104800291] [2024-06-27 19:56:00,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:00,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:00,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:01,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:01,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:01,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104800291] [2024-06-27 19:56:01,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104800291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:01,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:01,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:56:01,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018367848] [2024-06-27 19:56:01,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:01,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:56:01,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:01,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:56:01,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:56:01,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 19:56:01,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 512 transitions, 5085 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:01,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:01,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 19:56:01,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:03,817 INFO L124 PetriNetUnfolderBase]: 5171/7721 cut-off events. [2024-06-27 19:56:03,817 INFO L125 PetriNetUnfolderBase]: For 3732919/3732929 co-relation queries the response was YES. [2024-06-27 19:56:04,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101064 conditions, 7721 events. 5171/7721 cut-off events. For 3732919/3732929 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 41598 event pairs, 1120 based on Foata normal form. 2/7706 useless extension candidates. Maximal degree in co-relation 100865. Up to 7331 conditions per place. [2024-06-27 19:56:04,057 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 465 selfloop transitions, 20 changer transitions 0/535 dead transitions. [2024-06-27 19:56:04,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 535 transitions, 6185 flow [2024-06-27 19:56:04,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:56:04,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:56:04,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 19:56:04,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2024-06-27 19:56:04,058 INFO L175 Difference]: Start difference. First operand has 407 places, 512 transitions, 5085 flow. Second operand 8 states and 140 transitions. [2024-06-27 19:56:04,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 535 transitions, 6185 flow [2024-06-27 19:56:12,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 535 transitions, 6086 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-27 19:56:12,991 INFO L231 Difference]: Finished difference. Result has 406 places, 515 transitions, 5117 flow [2024-06-27 19:56:12,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4986, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5117, PETRI_PLACES=406, PETRI_TRANSITIONS=515} [2024-06-27 19:56:12,992 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 361 predicate places. [2024-06-27 19:56:12,992 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 515 transitions, 5117 flow [2024-06-27 19:56:12,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:12,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:12,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:12,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-27 19:56:12,992 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:12,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:12,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1699645274, now seen corresponding path program 2 times [2024-06-27 19:56:12,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:12,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284599650] [2024-06-27 19:56:12,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:12,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:12,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:13,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:13,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:13,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284599650] [2024-06-27 19:56:13,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284599650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:13,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:13,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:56:13,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790752380] [2024-06-27 19:56:13,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:13,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:56:13,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:13,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:56:13,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:56:13,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 19:56:13,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 515 transitions, 5117 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:13,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:13,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 19:56:13,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:16,132 INFO L124 PetriNetUnfolderBase]: 5181/7735 cut-off events. [2024-06-27 19:56:16,132 INFO L125 PetriNetUnfolderBase]: For 3773562/3773572 co-relation queries the response was YES. [2024-06-27 19:56:16,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101934 conditions, 7735 events. 5181/7735 cut-off events. For 3773562/3773572 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 41687 event pairs, 1109 based on Foata normal form. 2/7720 useless extension candidates. Maximal degree in co-relation 101734. Up to 7310 conditions per place. [2024-06-27 19:56:16,256 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 452 selfloop transitions, 39 changer transitions 0/541 dead transitions. [2024-06-27 19:56:16,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 541 transitions, 6613 flow [2024-06-27 19:56:16,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:56:16,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:56:16,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 19:56:16,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-27 19:56:16,257 INFO L175 Difference]: Start difference. First operand has 406 places, 515 transitions, 5117 flow. Second operand 8 states and 144 transitions. [2024-06-27 19:56:16,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 541 transitions, 6613 flow [2024-06-27 19:56:24,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 541 transitions, 6506 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-27 19:56:24,398 INFO L231 Difference]: Finished difference. Result has 408 places, 521 transitions, 5268 flow [2024-06-27 19:56:24,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5010, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5268, PETRI_PLACES=408, PETRI_TRANSITIONS=521} [2024-06-27 19:56:24,399 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 363 predicate places. [2024-06-27 19:56:24,399 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 521 transitions, 5268 flow [2024-06-27 19:56:24,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:24,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:24,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:24,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-27 19:56:24,399 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:24,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:24,400 INFO L85 PathProgramCache]: Analyzing trace with hash 683595988, now seen corresponding path program 1 times [2024-06-27 19:56:24,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:24,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474052130] [2024-06-27 19:56:24,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:24,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:24,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:25,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:25,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:25,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474052130] [2024-06-27 19:56:25,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474052130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:25,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:25,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:56:25,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121084475] [2024-06-27 19:56:25,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:25,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:56:25,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:25,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:56:25,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:56:25,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 19:56:25,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 521 transitions, 5268 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:25,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:25,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 19:56:25,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:27,716 INFO L124 PetriNetUnfolderBase]: 5190/7750 cut-off events. [2024-06-27 19:56:27,716 INFO L125 PetriNetUnfolderBase]: For 3837990/3838000 co-relation queries the response was YES. [2024-06-27 19:56:27,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102770 conditions, 7750 events. 5190/7750 cut-off events. For 3837990/3838000 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 41812 event pairs, 1104 based on Foata normal form. 3/7736 useless extension candidates. Maximal degree in co-relation 102569. Up to 7291 conditions per place. [2024-06-27 19:56:27,838 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 458 selfloop transitions, 43 changer transitions 0/551 dead transitions. [2024-06-27 19:56:27,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 551 transitions, 6738 flow [2024-06-27 19:56:27,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:56:27,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:56:27,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 19:56:27,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-27 19:56:27,839 INFO L175 Difference]: Start difference. First operand has 408 places, 521 transitions, 5268 flow. Second operand 8 states and 150 transitions. [2024-06-27 19:56:27,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 551 transitions, 6738 flow [2024-06-27 19:56:35,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 551 transitions, 6616 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-27 19:56:35,448 INFO L231 Difference]: Finished difference. Result has 412 places, 527 transitions, 5356 flow [2024-06-27 19:56:35,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5146, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5356, PETRI_PLACES=412, PETRI_TRANSITIONS=527} [2024-06-27 19:56:35,448 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 367 predicate places. [2024-06-27 19:56:35,448 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 527 transitions, 5356 flow [2024-06-27 19:56:35,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:35,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:35,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:35,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-27 19:56:35,448 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:35,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:35,448 INFO L85 PathProgramCache]: Analyzing trace with hash 688237618, now seen corresponding path program 2 times [2024-06-27 19:56:35,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:35,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644620122] [2024-06-27 19:56:35,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:35,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:35,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:36,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:36,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:36,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644620122] [2024-06-27 19:56:36,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644620122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:36,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:36,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:56:36,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384111717] [2024-06-27 19:56:36,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:36,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:56:36,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:36,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:56:36,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:56:36,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 19:56:36,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 527 transitions, 5356 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:36,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:36,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 19:56:36,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:38,688 INFO L124 PetriNetUnfolderBase]: 5229/7804 cut-off events. [2024-06-27 19:56:38,688 INFO L125 PetriNetUnfolderBase]: For 3924619/3924629 co-relation queries the response was YES. [2024-06-27 19:56:38,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104619 conditions, 7804 events. 5229/7804 cut-off events. For 3924619/3924629 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 42166 event pairs, 1108 based on Foata normal form. 3/7790 useless extension candidates. Maximal degree in co-relation 104416. Up to 7326 conditions per place. [2024-06-27 19:56:38,944 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 461 selfloop transitions, 46 changer transitions 0/557 dead transitions. [2024-06-27 19:56:38,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 557 transitions, 7148 flow [2024-06-27 19:56:38,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:56:38,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:56:38,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 19:56:38,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-27 19:56:38,945 INFO L175 Difference]: Start difference. First operand has 412 places, 527 transitions, 5356 flow. Second operand 8 states and 152 transitions. [2024-06-27 19:56:38,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 557 transitions, 7148 flow [2024-06-27 19:56:48,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 557 transitions, 6984 flow, removed 64 selfloop flow, removed 4 redundant places. [2024-06-27 19:56:48,249 INFO L231 Difference]: Finished difference. Result has 416 places, 533 transitions, 5414 flow [2024-06-27 19:56:48,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5244, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5414, PETRI_PLACES=416, PETRI_TRANSITIONS=533} [2024-06-27 19:56:48,249 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 371 predicate places. [2024-06-27 19:56:48,250 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 533 transitions, 5414 flow [2024-06-27 19:56:48,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:48,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:48,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:48,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-27 19:56:48,250 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:48,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:48,251 INFO L85 PathProgramCache]: Analyzing trace with hash 688244128, now seen corresponding path program 3 times [2024-06-27 19:56:48,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:48,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407766887] [2024-06-27 19:56:48,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:48,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:48,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:49,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:49,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:49,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407766887] [2024-06-27 19:56:49,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407766887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:49,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:49,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:56:49,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303278973] [2024-06-27 19:56:49,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:49,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:56:49,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:49,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:56:49,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:56:49,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 19:56:49,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 533 transitions, 5414 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:49,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:49,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 19:56:49,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:51,526 INFO L124 PetriNetUnfolderBase]: 5220/7792 cut-off events. [2024-06-27 19:56:51,526 INFO L125 PetriNetUnfolderBase]: For 3939349/3939359 co-relation queries the response was YES. [2024-06-27 19:56:51,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104216 conditions, 7792 events. 5220/7792 cut-off events. For 3939349/3939359 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 42062 event pairs, 1108 based on Foata normal form. 3/7778 useless extension candidates. Maximal degree in co-relation 104011. Up to 7319 conditions per place. [2024-06-27 19:56:51,653 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 457 selfloop transitions, 47 changer transitions 0/554 dead transitions. [2024-06-27 19:56:51,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 554 transitions, 6774 flow [2024-06-27 19:56:51,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:56:51,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:56:51,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 19:56:51,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-27 19:56:51,654 INFO L175 Difference]: Start difference. First operand has 416 places, 533 transitions, 5414 flow. Second operand 8 states and 148 transitions. [2024-06-27 19:56:51,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 554 transitions, 6774 flow [2024-06-27 19:57:01,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 554 transitions, 6671 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-27 19:57:01,461 INFO L231 Difference]: Finished difference. Result has 420 places, 533 transitions, 5411 flow [2024-06-27 19:57:01,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5311, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5411, PETRI_PLACES=420, PETRI_TRANSITIONS=533} [2024-06-27 19:57:01,462 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 375 predicate places. [2024-06-27 19:57:01,462 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 533 transitions, 5411 flow [2024-06-27 19:57:01,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:01,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:01,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:01,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-27 19:57:01,462 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:01,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:01,462 INFO L85 PathProgramCache]: Analyzing trace with hash 688237432, now seen corresponding path program 3 times [2024-06-27 19:57:01,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:01,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557959274] [2024-06-27 19:57:01,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:01,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:01,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:02,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:02,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:02,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557959274] [2024-06-27 19:57:02,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557959274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:02,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:02,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:57:02,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763050826] [2024-06-27 19:57:02,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:02,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:57:02,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:02,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:57:02,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:57:02,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 19:57:02,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 533 transitions, 5411 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:02,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:02,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 19:57:02,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:04,734 INFO L124 PetriNetUnfolderBase]: 5236/7812 cut-off events. [2024-06-27 19:57:04,735 INFO L125 PetriNetUnfolderBase]: For 3978071/3978081 co-relation queries the response was YES. [2024-06-27 19:57:04,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104623 conditions, 7812 events. 5236/7812 cut-off events. For 3978071/3978081 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 42174 event pairs, 1113 based on Foata normal form. 2/7797 useless extension candidates. Maximal degree in co-relation 104417. Up to 7383 conditions per place. [2024-06-27 19:57:04,863 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 462 selfloop transitions, 41 changer transitions 0/553 dead transitions. [2024-06-27 19:57:04,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 553 transitions, 6837 flow [2024-06-27 19:57:05,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:57:05,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:57:05,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 19:57:05,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4034090909090909 [2024-06-27 19:57:05,006 INFO L175 Difference]: Start difference. First operand has 420 places, 533 transitions, 5411 flow. Second operand 8 states and 142 transitions. [2024-06-27 19:57:05,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 553 transitions, 6837 flow [2024-06-27 19:57:15,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 553 transitions, 6733 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 19:57:15,646 INFO L231 Difference]: Finished difference. Result has 421 places, 536 transitions, 5469 flow [2024-06-27 19:57:15,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5307, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5469, PETRI_PLACES=421, PETRI_TRANSITIONS=536} [2024-06-27 19:57:15,646 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 376 predicate places. [2024-06-27 19:57:15,646 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 536 transitions, 5469 flow [2024-06-27 19:57:15,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:15,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:15,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:15,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-27 19:57:15,647 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:15,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:15,647 INFO L85 PathProgramCache]: Analyzing trace with hash 29004452, now seen corresponding path program 4 times [2024-06-27 19:57:15,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:15,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094725315] [2024-06-27 19:57:15,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:15,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:15,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:16,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:16,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:16,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094725315] [2024-06-27 19:57:16,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094725315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:16,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:16,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:57:16,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957725690] [2024-06-27 19:57:16,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:16,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:57:16,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:16,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:57:16,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:57:16,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 19:57:16,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 536 transitions, 5469 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:16,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:16,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 19:57:16,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:18,946 INFO L124 PetriNetUnfolderBase]: 5245/7828 cut-off events. [2024-06-27 19:57:18,946 INFO L125 PetriNetUnfolderBase]: For 4039983/4039996 co-relation queries the response was YES. [2024-06-27 19:57:19,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105010 conditions, 7828 events. 5245/7828 cut-off events. For 4039983/4039996 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 42289 event pairs, 1112 based on Foata normal form. 3/7813 useless extension candidates. Maximal degree in co-relation 104803. Up to 7347 conditions per place. [2024-06-27 19:57:19,073 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 454 selfloop transitions, 52 changer transitions 0/556 dead transitions. [2024-06-27 19:57:19,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 556 transitions, 6866 flow [2024-06-27 19:57:19,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:57:19,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:57:19,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 19:57:19,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4034090909090909 [2024-06-27 19:57:19,074 INFO L175 Difference]: Start difference. First operand has 421 places, 536 transitions, 5469 flow. Second operand 8 states and 142 transitions. [2024-06-27 19:57:19,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 556 transitions, 6866 flow [2024-06-27 19:57:30,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 556 transitions, 6744 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-27 19:57:30,422 INFO L231 Difference]: Finished difference. Result has 424 places, 539 transitions, 5496 flow [2024-06-27 19:57:30,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5347, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5496, PETRI_PLACES=424, PETRI_TRANSITIONS=539} [2024-06-27 19:57:30,422 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 379 predicate places. [2024-06-27 19:57:30,423 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 539 transitions, 5496 flow [2024-06-27 19:57:30,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:30,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:30,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:30,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-27 19:57:30,423 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:30,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:30,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1048163562, now seen corresponding path program 5 times [2024-06-27 19:57:30,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:30,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037001841] [2024-06-27 19:57:30,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:30,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:30,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:31,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:31,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:31,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037001841] [2024-06-27 19:57:31,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037001841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:31,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:31,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:57:31,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632868343] [2024-06-27 19:57:31,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:31,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:57:31,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:31,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:57:31,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:57:31,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 19:57:31,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 539 transitions, 5496 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:31,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:31,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 19:57:31,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:33,776 INFO L124 PetriNetUnfolderBase]: 5260/7849 cut-off events. [2024-06-27 19:57:33,776 INFO L125 PetriNetUnfolderBase]: For 4090497/4090510 co-relation queries the response was YES. [2024-06-27 19:57:33,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105480 conditions, 7849 events. 5260/7849 cut-off events. For 4090497/4090510 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 42383 event pairs, 1110 based on Foata normal form. 3/7834 useless extension candidates. Maximal degree in co-relation 105272. Up to 7361 conditions per place. [2024-06-27 19:57:33,902 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 458 selfloop transitions, 53 changer transitions 0/561 dead transitions. [2024-06-27 19:57:33,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 561 transitions, 6917 flow [2024-06-27 19:57:33,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:57:33,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:57:33,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 19:57:33,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119318181818182 [2024-06-27 19:57:33,903 INFO L175 Difference]: Start difference. First operand has 424 places, 539 transitions, 5496 flow. Second operand 8 states and 145 transitions. [2024-06-27 19:57:33,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 561 transitions, 6917 flow [2024-06-27 19:57:44,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 561 transitions, 6805 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 19:57:44,092 INFO L231 Difference]: Finished difference. Result has 427 places, 542 transitions, 5541 flow [2024-06-27 19:57:44,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5393, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5541, PETRI_PLACES=427, PETRI_TRANSITIONS=542} [2024-06-27 19:57:44,092 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 382 predicate places. [2024-06-27 19:57:44,093 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 542 transitions, 5541 flow [2024-06-27 19:57:44,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:44,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:44,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:44,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-27 19:57:44,093 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:44,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:44,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1495433824, now seen corresponding path program 6 times [2024-06-27 19:57:44,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:44,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960269786] [2024-06-27 19:57:44,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:44,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:44,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:44,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:44,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:44,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960269786] [2024-06-27 19:57:44,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960269786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:44,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:44,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:57:44,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530485551] [2024-06-27 19:57:44,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:44,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:57:44,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:44,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:57:44,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:57:45,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 19:57:45,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 542 transitions, 5541 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:45,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:45,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 19:57:45,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:47,338 INFO L124 PetriNetUnfolderBase]: 5251/7837 cut-off events. [2024-06-27 19:57:47,338 INFO L125 PetriNetUnfolderBase]: For 4105570/4105583 co-relation queries the response was YES. [2024-06-27 19:57:47,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105218 conditions, 7837 events. 5251/7837 cut-off events. For 4105570/4105583 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 42341 event pairs, 1110 based on Foata normal form. 3/7822 useless extension candidates. Maximal degree in co-relation 105009. Up to 7354 conditions per place. [2024-06-27 19:57:47,469 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 458 selfloop transitions, 52 changer transitions 0/560 dead transitions. [2024-06-27 19:57:47,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 560 transitions, 6609 flow [2024-06-27 19:57:47,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:57:47,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:57:47,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 19:57:47,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119318181818182 [2024-06-27 19:57:47,470 INFO L175 Difference]: Start difference. First operand has 427 places, 542 transitions, 5541 flow. Second operand 8 states and 145 transitions. [2024-06-27 19:57:47,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 560 transitions, 6609 flow [2024-06-27 19:57:56,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 560 transitions, 6430 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-27 19:57:56,104 INFO L231 Difference]: Finished difference. Result has 428 places, 542 transitions, 5472 flow [2024-06-27 19:57:56,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5362, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5472, PETRI_PLACES=428, PETRI_TRANSITIONS=542} [2024-06-27 19:57:56,105 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 383 predicate places. [2024-06-27 19:57:56,105 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 542 transitions, 5472 flow [2024-06-27 19:57:56,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:56,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:56,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:56,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-27 19:57:56,105 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)] === [2024-06-27 19:57:56,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:56,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1048163376, now seen corresponding path program 4 times [2024-06-27 19:57:56,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:56,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594527400] [2024-06-27 19:57:56,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:56,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:56,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:56,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:56,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:56,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594527400] [2024-06-27 19:57:56,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594527400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:56,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:56,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:57:56,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272606978] [2024-06-27 19:57:56,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:56,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:57:56,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:56,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:57:56,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:57:56,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 19:57:56,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 542 transitions, 5472 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:56,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:56,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 19:57:56,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:59,316 INFO L124 PetriNetUnfolderBase]: 5251/7835 cut-off events. [2024-06-27 19:57:59,316 INFO L125 PetriNetUnfolderBase]: For 4119879/4119892 co-relation queries the response was YES. [2024-06-27 19:57:59,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105089 conditions, 7835 events. 5251/7835 cut-off events. For 4119879/4119892 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 42304 event pairs, 1130 based on Foata normal form. 2/7819 useless extension candidates. Maximal degree in co-relation 104879. Up to 7408 conditions per place. [2024-06-27 19:57:59,446 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 463 selfloop transitions, 41 changer transitions 0/554 dead transitions. [2024-06-27 19:57:59,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 554 transitions, 6512 flow [2024-06-27 19:57:59,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:57:59,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:57:59,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 19:57:59,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39204545454545453 [2024-06-27 19:57:59,447 INFO L175 Difference]: Start difference. First operand has 428 places, 542 transitions, 5472 flow. Second operand 8 states and 138 transitions. [2024-06-27 19:57:59,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 554 transitions, 6512 flow [2024-06-27 19:58:08,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 554 transitions, 6332 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-27 19:58:08,123 INFO L231 Difference]: Finished difference. Result has 428 places, 542 transitions, 5380 flow [2024-06-27 19:58:08,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5292, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5380, PETRI_PLACES=428, PETRI_TRANSITIONS=542} [2024-06-27 19:58:08,123 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 383 predicate places. [2024-06-27 19:58:08,123 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 542 transitions, 5380 flow [2024-06-27 19:58:08,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:58:08,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:08,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:08,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-27 19:58:08,124 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)] === [2024-06-27 19:58:08,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:08,124 INFO L85 PathProgramCache]: Analyzing trace with hash 894727918, now seen corresponding path program 1 times [2024-06-27 19:58:08,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:08,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521040993] [2024-06-27 19:58:08,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:08,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:08,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:09,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:09,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:09,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521040993] [2024-06-27 19:58:09,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521040993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:09,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:09,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:58:09,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026966759] [2024-06-27 19:58:09,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:09,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:58:09,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:09,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:58:09,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:58:09,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 19:58:09,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 542 transitions, 5380 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:58:09,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:09,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 19:58:09,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:11,476 INFO L124 PetriNetUnfolderBase]: 4680/7179 cut-off events. [2024-06-27 19:58:11,476 INFO L125 PetriNetUnfolderBase]: For 4216531/4216566 co-relation queries the response was YES. [2024-06-27 19:58:11,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100914 conditions, 7179 events. 4680/7179 cut-off events. For 4216531/4216566 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 40408 event pairs, 1011 based on Foata normal form. 17/7121 useless extension candidates. Maximal degree in co-relation 100703. Up to 6405 conditions per place. [2024-06-27 19:58:11,600 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 431 selfloop transitions, 17 changer transitions 0/556 dead transitions. [2024-06-27 19:58:11,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 556 transitions, 6360 flow [2024-06-27 19:58:11,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:58:11,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:58:11,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 19:58:11,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-27 19:58:11,601 INFO L175 Difference]: Start difference. First operand has 428 places, 542 transitions, 5380 flow. Second operand 8 states and 144 transitions. [2024-06-27 19:58:11,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 556 transitions, 6360 flow [2024-06-27 19:58:21,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 556 transitions, 6220 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-27 19:58:21,325 INFO L231 Difference]: Finished difference. Result has 428 places, 544 transitions, 5339 flow [2024-06-27 19:58:21,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5240, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5339, PETRI_PLACES=428, PETRI_TRANSITIONS=544} [2024-06-27 19:58:21,325 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 383 predicate places. [2024-06-27 19:58:21,325 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 544 transitions, 5339 flow [2024-06-27 19:58:21,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:58:21,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:21,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:21,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-27 19:58:21,325 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:21,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:21,325 INFO L85 PathProgramCache]: Analyzing trace with hash 564973333, now seen corresponding path program 1 times [2024-06-27 19:58:21,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:21,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601031733] [2024-06-27 19:58:21,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:21,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:21,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:22,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:22,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:22,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601031733] [2024-06-27 19:58:22,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601031733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:22,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:22,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 19:58:22,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700616788] [2024-06-27 19:58:22,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:22,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 19:58:22,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:22,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 19:58:22,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-27 19:58:23,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:58:23,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 544 transitions, 5339 flow. Second operand has 13 states, 13 states have (on average 11.23076923076923) internal successors, (146), 13 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:58:23,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:23,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:58:23,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:25,585 INFO L124 PetriNetUnfolderBase]: 5035/7676 cut-off events. [2024-06-27 19:58:25,585 INFO L125 PetriNetUnfolderBase]: For 4455741/4455741 co-relation queries the response was YES. [2024-06-27 19:58:25,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107513 conditions, 7676 events. 5035/7676 cut-off events. For 4455741/4455741 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 43856 event pairs, 870 based on Foata normal form. 16/7659 useless extension candidates. Maximal degree in co-relation 107301. Up to 6673 conditions per place. [2024-06-27 19:58:25,714 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 522 selfloop transitions, 46 changer transitions 0/617 dead transitions. [2024-06-27 19:58:25,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 617 transitions, 7571 flow [2024-06-27 19:58:25,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 19:58:25,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 19:58:25,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 263 transitions. [2024-06-27 19:58:25,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4597902097902098 [2024-06-27 19:58:25,715 INFO L175 Difference]: Start difference. First operand has 428 places, 544 transitions, 5339 flow. Second operand 13 states and 263 transitions. [2024-06-27 19:58:25,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 617 transitions, 7571 flow [2024-06-27 19:58:34,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 617 transitions, 7488 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 19:58:34,422 INFO L231 Difference]: Finished difference. Result has 435 places, 546 transitions, 5604 flow [2024-06-27 19:58:34,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5256, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5604, PETRI_PLACES=435, PETRI_TRANSITIONS=546} [2024-06-27 19:58:34,422 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 390 predicate places. [2024-06-27 19:58:34,422 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 546 transitions, 5604 flow [2024-06-27 19:58:34,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 11.23076923076923) internal successors, (146), 13 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:58:34,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:34,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:34,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-27 19:58:34,423 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:34,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:34,423 INFO L85 PathProgramCache]: Analyzing trace with hash 566851003, now seen corresponding path program 2 times [2024-06-27 19:58:34,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:34,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354472712] [2024-06-27 19:58:34,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:34,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:34,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:35,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:35,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:35,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354472712] [2024-06-27 19:58:35,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354472712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:35,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:35,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 19:58:35,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923140351] [2024-06-27 19:58:35,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:35,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 19:58:35,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:35,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 19:58:35,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-27 19:58:36,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:58:36,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 546 transitions, 5604 flow. Second operand has 13 states, 13 states have (on average 11.23076923076923) internal successors, (146), 13 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:58:36,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:36,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:58:36,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:38,756 INFO L124 PetriNetUnfolderBase]: 5104/7805 cut-off events. [2024-06-27 19:58:38,756 INFO L125 PetriNetUnfolderBase]: For 4577080/4577080 co-relation queries the response was YES. [2024-06-27 19:58:38,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110148 conditions, 7805 events. 5104/7805 cut-off events. For 4577080/4577080 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 44942 event pairs, 1035 based on Foata normal form. 20/7792 useless extension candidates. Maximal degree in co-relation 109935. Up to 7059 conditions per place. [2024-06-27 19:58:38,891 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 522 selfloop transitions, 41 changer transitions 0/612 dead transitions. [2024-06-27 19:58:38,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 612 transitions, 7116 flow [2024-06-27 19:58:38,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 19:58:38,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 19:58:38,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 258 transitions. [2024-06-27 19:58:38,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45104895104895104 [2024-06-27 19:58:38,892 INFO L175 Difference]: Start difference. First operand has 435 places, 546 transitions, 5604 flow. Second operand 13 states and 258 transitions. [2024-06-27 19:58:38,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 612 transitions, 7116 flow