./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix011.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/mix011.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix011.opt.i ./goblint.2024-06-19_11-23-25.files/protection/mix011.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 19:55:30,863 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 19:55:30,908 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 19:55:30,925 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 19:55:30,925 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 19:55:30,957 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 19:55:30,957 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 19:55:30,957 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 19:55:30,958 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 19:55:30,962 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 19:55:30,962 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 19:55:30,963 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 19:55:30,964 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 19:55:30,965 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 19:55:30,965 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 19:55:30,965 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 19:55:30,965 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 19:55:30,966 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 19:55:30,966 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 19:55:30,966 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 19:55:30,966 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 19:55:30,966 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 19:55:30,967 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 19:55:30,967 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 19:55:30,967 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 19:55:30,967 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 19:55:30,967 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 19:55:30,968 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 19:55:30,968 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 19:55:30,968 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 19:55:30,969 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 19:55:30,969 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 19:55:30,970 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:55:30,970 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 19:55:30,970 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 19:55:30,970 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 19:55:30,970 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 19:55:30,970 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 19:55:30,971 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 19:55:30,971 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 19:55:30,971 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 19:55:30,971 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 19:55:30,972 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 19:55:30,972 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 19:55:31,195 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 19:55:31,217 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 19:55:31,219 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 19:55:31,220 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 19:55:31,220 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 19:55:31,221 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix011.opt.yml/witness.yml [2024-06-27 19:55:31,395 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 19:55:31,396 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 19:55:31,397 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix011.opt.i [2024-06-27 19:55:32,555 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 19:55:32,790 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 19:55:32,790 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix011.opt.i [2024-06-27 19:55:32,811 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19de8615a/947976d9a1e942bb877625229064a71d/FLAG217b0c720 [2024-06-27 19:55:32,822 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19de8615a/947976d9a1e942bb877625229064a71d [2024-06-27 19:55:32,822 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 19:55:32,823 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 19:55:32,824 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 19:55:32,824 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 19:55:32,829 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 19:55:32,831 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:55:31" (1/2) ... [2024-06-27 19:55:32,832 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2945e725 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:55:32, skipping insertion in model container [2024-06-27 19:55:32,832 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:55:31" (1/2) ... [2024-06-27 19:55:32,834 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1290ad31 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:55:32, skipping insertion in model container [2024-06-27 19:55:32,834 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:55:32" (2/2) ... [2024-06-27 19:55:32,835 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2945e725 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:55:32, skipping insertion in model container [2024-06-27 19:55:32,835 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:55:32" (2/2) ... [2024-06-27 19:55:32,835 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 19:55:32,908 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 19:55:32,909 INFO L97 edCorrectnessWitness]: Location invariant before [L857-L857] ((((((((((((((((((((! multithreaded || z$read_delayed_var == 0) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) [2024-06-27 19:55:32,910 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] ((((((((((((((((((((! multithreaded || z$read_delayed_var == 0) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) [2024-06-27 19:55:32,910 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] ((((((((((((((((((((! multithreaded || z$read_delayed_var == 0) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) [2024-06-27 19:55:32,910 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 19:55:32,910 INFO L106 edCorrectnessWitness]: ghost_update [L852-L852] multithreaded = 1; [2024-06-27 19:55:32,949 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 19:55:33,355 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:55:33,366 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 19:55:33,488 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:55:33,528 INFO L206 MainTranslator]: Completed translation [2024-06-27 19:55:33,529 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:55:33 WrapperNode [2024-06-27 19:55:33,529 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 19:55:33,530 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 19:55:33,530 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 19:55:33,530 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 19:55:33,536 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:55:33" (1/1) ... [2024-06-27 19:55:33,556 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:55:33" (1/1) ... [2024-06-27 19:55:33,578 INFO L138 Inliner]: procedures = 175, calls = 49, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 150 [2024-06-27 19:55:33,579 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 19:55:33,579 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 19:55:33,580 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 19:55:33,580 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 19:55:33,588 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:55:33" (1/1) ... [2024-06-27 19:55:33,588 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:55:33" (1/1) ... [2024-06-27 19:55:33,590 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:55:33" (1/1) ... [2024-06-27 19:55:33,602 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 19:55:33,602 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:55:33" (1/1) ... [2024-06-27 19:55:33,602 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:55:33" (1/1) ... [2024-06-27 19:55:33,620 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:55:33" (1/1) ... [2024-06-27 19:55:33,622 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:55:33" (1/1) ... [2024-06-27 19:55:33,635 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:55:33" (1/1) ... [2024-06-27 19:55:33,636 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:55:33" (1/1) ... [2024-06-27 19:55:33,639 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 19:55:33,639 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 19:55:33,639 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 19:55:33,640 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 19:55:33,640 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:55:33" (1/1) ... [2024-06-27 19:55:33,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:55:33,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 19:55:33,684 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 19:55:33,700 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 19:55:33,716 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 19:55:33,716 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 19:55:33,716 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 19:55:33,717 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 19:55:33,717 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 19:55:33,717 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 19:55:33,717 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 19:55:33,717 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 19:55:33,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 19:55:33,717 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 19:55:33,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 19:55:33,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 19:55:33,719 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 19:55:33,817 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 19:55:33,819 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 19:55:34,097 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 19:55:34,097 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 19:55:34,288 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 19:55:34,288 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 19:55:34,289 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:55:34 BoogieIcfgContainer [2024-06-27 19:55:34,289 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 19:55:34,291 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 19:55:34,291 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 19:55:34,293 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 19:55:34,293 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:55:31" (1/4) ... [2024-06-27 19:55:34,294 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45fdc9f8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 07:55:34, skipping insertion in model container [2024-06-27 19:55:34,294 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 07:55:32" (2/4) ... [2024-06-27 19:55:34,295 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45fdc9f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 07:55:34, skipping insertion in model container [2024-06-27 19:55:34,295 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:55:33" (3/4) ... [2024-06-27 19:55:34,295 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45fdc9f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 07:55:34, skipping insertion in model container [2024-06-27 19:55:34,295 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:55:34" (4/4) ... [2024-06-27 19:55:34,296 INFO L112 eAbstractionObserver]: Analyzing ICFG mix011.opt.i [2024-06-27 19:55:34,308 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 19:55:34,308 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 19:55:34,309 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 19:55:34,347 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 19:55:34,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-27 19:55:34,402 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-27 19:55:34,403 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:55:34,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 72 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 19:55:34,405 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-27 19:55:34,408 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-27 19:55:34,419 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 19:55:34,424 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;@10c93ec7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 19:55:34,424 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 19:55:34,428 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 19:55:34,429 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 19:55:34,429 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:55:34,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:34,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 19:55:34,430 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 19:55:34,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:34,433 INFO L85 PathProgramCache]: Analyzing trace with hash 401253807, now seen corresponding path program 1 times [2024-06-27 19:55:34,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:34,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194006315] [2024-06-27 19:55:34,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:34,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:34,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:35,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:35,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:35,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194006315] [2024-06-27 19:55:35,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194006315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:35,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:35,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 19:55:35,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606416110] [2024-06-27 19:55:35,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:35,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 19:55:35,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:35,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 19:55:35,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 19:55:35,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-06-27 19:55:35,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:35,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:35,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-06-27 19:55:35,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:35,956 INFO L124 PetriNetUnfolderBase]: 1359/2139 cut-off events. [2024-06-27 19:55:35,957 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-27 19:55:35,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4253 conditions, 2139 events. 1359/2139 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10954 event pairs, 941 based on Foata normal form. 1/2060 useless extension candidates. Maximal degree in co-relation 4241. Up to 2029 conditions per place. [2024-06-27 19:55:35,972 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 32 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-27 19:55:35,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 175 flow [2024-06-27 19:55:35,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 19:55:35,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 19:55:35,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2024-06-27 19:55:35,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627906976744186 [2024-06-27 19:55:35,984 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 81 transitions. [2024-06-27 19:55:35,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 175 flow [2024-06-27 19:55:35,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 19:55:35,989 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-27 19:55:35,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-27 19:55:35,993 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-27 19:55:35,994 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-27 19:55:35,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:35,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:35,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:35,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 19:55:35,994 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 19:55:35,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:35,996 INFO L85 PathProgramCache]: Analyzing trace with hash -942118130, now seen corresponding path program 1 times [2024-06-27 19:55:35,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:35,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681692945] [2024-06-27 19:55:35,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:35,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:36,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:36,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:36,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:36,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681692945] [2024-06-27 19:55:36,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681692945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:36,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:36,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 19:55:36,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091778156] [2024-06-27 19:55:36,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:36,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:55:36,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:36,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:55:36,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:55:36,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-27 19:55:36,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:36,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:36,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-27 19:55:36,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:37,239 INFO L124 PetriNetUnfolderBase]: 1560/2387 cut-off events. [2024-06-27 19:55:37,239 INFO L125 PetriNetUnfolderBase]: For 465/465 co-relation queries the response was YES. [2024-06-27 19:55:37,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5403 conditions, 2387 events. 1560/2387 cut-off events. For 465/465 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11952 event pairs, 930 based on Foata normal form. 3/2377 useless extension candidates. Maximal degree in co-relation 5391. Up to 2302 conditions per place. [2024-06-27 19:55:37,250 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 40 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-27 19:55:37,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 244 flow [2024-06-27 19:55:37,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:55:37,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:55:37,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-27 19:55:37,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5930232558139535 [2024-06-27 19:55:37,252 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 102 transitions. [2024-06-27 19:55:37,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 244 flow [2024-06-27 19:55:37,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 19:55:37,254 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-27 19:55:37,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-27 19:55:37,254 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-27 19:55:37,254 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-27 19:55:37,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:37,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:37,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:37,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 19:55:37,255 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 19:55:37,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:37,256 INFO L85 PathProgramCache]: Analyzing trace with hash 859110040, now seen corresponding path program 1 times [2024-06-27 19:55:37,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:37,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254228063] [2024-06-27 19:55:37,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:37,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:37,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:38,199 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 19:55:38,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:38,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254228063] [2024-06-27 19:55:38,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254228063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:38,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:38,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:55:38,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673678934] [2024-06-27 19:55:38,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:38,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:55:38,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:38,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:55:38,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:55:38,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-27 19:55:38,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:38,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:38,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-27 19:55:38,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:38,588 INFO L124 PetriNetUnfolderBase]: 1568/2455 cut-off events. [2024-06-27 19:55:38,589 INFO L125 PetriNetUnfolderBase]: For 1364/1364 co-relation queries the response was YES. [2024-06-27 19:55:38,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6088 conditions, 2455 events. 1568/2455 cut-off events. For 1364/1364 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12627 event pairs, 669 based on Foata normal form. 5/2454 useless extension candidates. Maximal degree in co-relation 6074. Up to 2248 conditions per place. [2024-06-27 19:55:38,600 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 53 selfloop transitions, 16 changer transitions 0/76 dead transitions. [2024-06-27 19:55:38,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 76 transitions, 398 flow [2024-06-27 19:55:38,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:55:38,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:55:38,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-27 19:55:38,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6186046511627907 [2024-06-27 19:55:38,603 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 5 states and 133 transitions. [2024-06-27 19:55:38,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 76 transitions, 398 flow [2024-06-27 19:55:38,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 76 transitions, 384 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 19:55:38,606 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 239 flow [2024-06-27 19:55:38,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=239, PETRI_PLACES=52, PETRI_TRANSITIONS=51} [2024-06-27 19:55:38,607 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 8 predicate places. [2024-06-27 19:55:38,607 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 239 flow [2024-06-27 19:55:38,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:38,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:38,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:38,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 19:55:38,608 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 19:55:38,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:38,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1607346961, now seen corresponding path program 1 times [2024-06-27 19:55:38,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:38,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615277695] [2024-06-27 19:55:38,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:38,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:38,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:39,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:39,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:39,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615277695] [2024-06-27 19:55:39,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615277695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:39,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:39,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:55:39,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977138797] [2024-06-27 19:55:39,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:39,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:55:39,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:39,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:55:39,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:55:39,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-27 19:55:39,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 239 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:39,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:39,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-27 19:55:39,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:40,318 INFO L124 PetriNetUnfolderBase]: 1580/2475 cut-off events. [2024-06-27 19:55:40,319 INFO L125 PetriNetUnfolderBase]: For 3227/3230 co-relation queries the response was YES. [2024-06-27 19:55:40,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7232 conditions, 2475 events. 1580/2475 cut-off events. For 3227/3230 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12769 event pairs, 481 based on Foata normal form. 12/2481 useless extension candidates. Maximal degree in co-relation 7215. Up to 2216 conditions per place. [2024-06-27 19:55:40,332 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 57 selfloop transitions, 19 changer transitions 0/83 dead transitions. [2024-06-27 19:55:40,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 83 transitions, 501 flow [2024-06-27 19:55:40,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:55:40,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:55:40,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-27 19:55:40,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5930232558139535 [2024-06-27 19:55:40,334 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 239 flow. Second operand 6 states and 153 transitions. [2024-06-27 19:55:40,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 83 transitions, 501 flow [2024-06-27 19:55:40,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 83 transitions, 493 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-27 19:55:40,338 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 295 flow [2024-06-27 19:55:40,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=295, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2024-06-27 19:55:40,338 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 13 predicate places. [2024-06-27 19:55:40,338 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 295 flow [2024-06-27 19:55:40,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:40,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:40,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:40,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 19:55:40,339 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 19:55:40,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:40,340 INFO L85 PathProgramCache]: Analyzing trace with hash 503880689, now seen corresponding path program 1 times [2024-06-27 19:55:40,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:40,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030432341] [2024-06-27 19:55:40,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:40,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:40,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:40,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:40,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:40,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030432341] [2024-06-27 19:55:40,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030432341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:40,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:40,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:55:40,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47448788] [2024-06-27 19:55:40,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:40,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:55:40,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:40,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:55:40,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:55:40,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:55:40,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 295 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:40,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:40,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:55:40,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:41,328 INFO L124 PetriNetUnfolderBase]: 1368/2206 cut-off events. [2024-06-27 19:55:41,328 INFO L125 PetriNetUnfolderBase]: For 4097/4097 co-relation queries the response was YES. [2024-06-27 19:55:41,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6977 conditions, 2206 events. 1368/2206 cut-off events. For 4097/4097 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 11678 event pairs, 562 based on Foata normal form. 2/2185 useless extension candidates. Maximal degree in co-relation 6956. Up to 2036 conditions per place. [2024-06-27 19:55:41,338 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 49 selfloop transitions, 8 changer transitions 0/64 dead transitions. [2024-06-27 19:55:41,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 64 transitions, 437 flow [2024-06-27 19:55:41,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:55:41,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:55:41,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2024-06-27 19:55:41,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-27 19:55:41,340 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 295 flow. Second operand 5 states and 105 transitions. [2024-06-27 19:55:41,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 64 transitions, 437 flow [2024-06-27 19:55:41,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 64 transitions, 387 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 19:55:41,343 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 269 flow [2024-06-27 19:55:41,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=269, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2024-06-27 19:55:41,344 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-06-27 19:55:41,344 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 269 flow [2024-06-27 19:55:41,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:41,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:41,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:41,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 19:55:41,345 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:55:41,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:41,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1599265881, now seen corresponding path program 1 times [2024-06-27 19:55:41,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:41,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171392853] [2024-06-27 19:55:41,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:41,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:41,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:41,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:41,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:41,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171392853] [2024-06-27 19:55:41,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171392853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:41,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:41,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:55:41,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577553065] [2024-06-27 19:55:41,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:41,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:55:41,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:41,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:55:41,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:55:41,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:55:41,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 269 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 19:55:41,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:41,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:55:41,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:42,434 INFO L124 PetriNetUnfolderBase]: 1606/2532 cut-off events. [2024-06-27 19:55:42,435 INFO L125 PetriNetUnfolderBase]: For 5550/5550 co-relation queries the response was YES. [2024-06-27 19:55:42,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8032 conditions, 2532 events. 1606/2532 cut-off events. For 5550/5550 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13048 event pairs, 676 based on Foata normal form. 2/2523 useless extension candidates. Maximal degree in co-relation 8009. Up to 2373 conditions per place. [2024-06-27 19:55:42,450 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 54 selfloop transitions, 11 changer transitions 0/71 dead transitions. [2024-06-27 19:55:42,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 71 transitions, 455 flow [2024-06-27 19:55:42,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:55:42,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:55:42,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-27 19:55:42,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2024-06-27 19:55:42,451 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 269 flow. Second operand 6 states and 119 transitions. [2024-06-27 19:55:42,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 71 transitions, 455 flow [2024-06-27 19:55:42,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 71 transitions, 433 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 19:55:42,455 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 301 flow [2024-06-27 19:55:42,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=301, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2024-06-27 19:55:42,456 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 16 predicate places. [2024-06-27 19:55:42,456 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 301 flow [2024-06-27 19:55:42,456 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 19:55:42,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:42,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:42,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 19:55:42,457 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 19:55:42,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:42,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1026778578, now seen corresponding path program 1 times [2024-06-27 19:55:42,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:42,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286835707] [2024-06-27 19:55:42,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:42,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:42,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:43,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:43,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:43,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286835707] [2024-06-27 19:55:43,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286835707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:43,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:43,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:55:43,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786575556] [2024-06-27 19:55:43,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:43,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:55:43,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:43,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:55:43,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:55:43,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:55:43,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 301 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 19:55:43,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:43,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:55:43,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:43,631 INFO L124 PetriNetUnfolderBase]: 1745/2695 cut-off events. [2024-06-27 19:55:43,632 INFO L125 PetriNetUnfolderBase]: For 8633/8639 co-relation queries the response was YES. [2024-06-27 19:55:43,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9313 conditions, 2695 events. 1745/2695 cut-off events. For 8633/8639 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13692 event pairs, 726 based on Foata normal form. 8/2696 useless extension candidates. Maximal degree in co-relation 9290. Up to 2505 conditions per place. [2024-06-27 19:55:43,652 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 53 selfloop transitions, 19 changer transitions 0/79 dead transitions. [2024-06-27 19:55:43,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 79 transitions, 541 flow [2024-06-27 19:55:43,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:55:43,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:55:43,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-27 19:55:43,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49612403100775193 [2024-06-27 19:55:43,654 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 301 flow. Second operand 6 states and 128 transitions. [2024-06-27 19:55:43,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 79 transitions, 541 flow [2024-06-27 19:55:43,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 79 transitions, 511 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 19:55:43,659 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 343 flow [2024-06-27 19:55:43,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=343, PETRI_PLACES=62, PETRI_TRANSITIONS=59} [2024-06-27 19:55:43,661 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 18 predicate places. [2024-06-27 19:55:43,661 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 343 flow [2024-06-27 19:55:43,661 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 19:55:43,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:43,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:43,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 19:55:43,662 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 19:55:43,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:43,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1101942896, now seen corresponding path program 2 times [2024-06-27 19:55:43,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:43,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923442950] [2024-06-27 19:55:43,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:43,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:43,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:44,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:44,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:44,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923442950] [2024-06-27 19:55:44,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923442950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:44,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:44,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:55:44,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984571789] [2024-06-27 19:55:44,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:44,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:55:44,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:44,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:55:44,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:55:44,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:55:44,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 59 transitions, 343 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 19:55:44,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:44,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:55:44,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:44,801 INFO L124 PetriNetUnfolderBase]: 1733/2668 cut-off events. [2024-06-27 19:55:44,801 INFO L125 PetriNetUnfolderBase]: For 10399/10405 co-relation queries the response was YES. [2024-06-27 19:55:44,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9549 conditions, 2668 events. 1733/2668 cut-off events. For 10399/10405 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13484 event pairs, 740 based on Foata normal form. 3/2659 useless extension candidates. Maximal degree in co-relation 9525. Up to 2489 conditions per place. [2024-06-27 19:55:44,813 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 47 selfloop transitions, 20 changer transitions 0/74 dead transitions. [2024-06-27 19:55:44,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 74 transitions, 515 flow [2024-06-27 19:55:44,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:55:44,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:55:44,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-06-27 19:55:44,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4806201550387597 [2024-06-27 19:55:44,814 INFO L175 Difference]: Start difference. First operand has 62 places, 59 transitions, 343 flow. Second operand 6 states and 124 transitions. [2024-06-27 19:55:44,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 74 transitions, 515 flow [2024-06-27 19:55:44,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 74 transitions, 486 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 19:55:44,819 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 362 flow [2024-06-27 19:55:44,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=362, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2024-06-27 19:55:44,821 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 21 predicate places. [2024-06-27 19:55:44,821 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 362 flow [2024-06-27 19:55:44,821 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 19:55:44,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:44,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:44,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 19:55:44,822 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 19:55:44,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:44,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1962366126, now seen corresponding path program 1 times [2024-06-27 19:55:44,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:44,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682086968] [2024-06-27 19:55:44,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:44,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:44,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:45,484 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 19:55:45,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:45,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682086968] [2024-06-27 19:55:45,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682086968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:45,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:45,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:55:45,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795877808] [2024-06-27 19:55:45,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:45,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:55:45,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:45,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:55:45,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:55:45,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:55:45,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 362 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 19:55:45,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:45,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:55:45,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:46,155 INFO L124 PetriNetUnfolderBase]: 1590/2516 cut-off events. [2024-06-27 19:55:46,155 INFO L125 PetriNetUnfolderBase]: For 10273/10273 co-relation queries the response was YES. [2024-06-27 19:55:46,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9018 conditions, 2516 events. 1590/2516 cut-off events. For 10273/10273 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12963 event pairs, 634 based on Foata normal form. 4/2506 useless extension candidates. Maximal degree in co-relation 8993. Up to 2330 conditions per place. [2024-06-27 19:55:46,167 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 62 selfloop transitions, 14 changer transitions 0/82 dead transitions. [2024-06-27 19:55:46,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 82 transitions, 586 flow [2024-06-27 19:55:46,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:55:46,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:55:46,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-27 19:55:46,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-27 19:55:46,168 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 362 flow. Second operand 7 states and 138 transitions. [2024-06-27 19:55:46,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 82 transitions, 586 flow [2024-06-27 19:55:46,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 82 transitions, 521 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 19:55:46,176 INFO L231 Difference]: Finished difference. Result has 66 places, 62 transitions, 361 flow [2024-06-27 19:55:46,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=361, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2024-06-27 19:55:46,177 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 22 predicate places. [2024-06-27 19:55:46,177 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 361 flow [2024-06-27 19:55:46,177 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 19:55:46,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:46,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:46,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 19:55:46,178 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:55:46,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:46,178 INFO L85 PathProgramCache]: Analyzing trace with hash 526431080, now seen corresponding path program 1 times [2024-06-27 19:55:46,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:46,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360637262] [2024-06-27 19:55:46,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:46,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:46,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:46,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:46,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:46,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360637262] [2024-06-27 19:55:46,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360637262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:46,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:46,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:55:46,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043464374] [2024-06-27 19:55:46,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:46,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:55:46,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:46,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:55:46,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:55:46,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:55:46,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 361 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 19:55:46,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:46,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:55:46,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:47,360 INFO L124 PetriNetUnfolderBase]: 1856/2802 cut-off events. [2024-06-27 19:55:47,361 INFO L125 PetriNetUnfolderBase]: For 14900/14906 co-relation queries the response was YES. [2024-06-27 19:55:47,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10783 conditions, 2802 events. 1856/2802 cut-off events. For 14900/14906 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13775 event pairs, 731 based on Foata normal form. 5/2803 useless extension candidates. Maximal degree in co-relation 10757. Up to 2601 conditions per place. [2024-06-27 19:55:47,372 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 63 selfloop transitions, 26 changer transitions 0/94 dead transitions. [2024-06-27 19:55:47,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 94 transitions, 691 flow [2024-06-27 19:55:47,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:55:47,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:55:47,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-27 19:55:47,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4750830564784053 [2024-06-27 19:55:47,374 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 361 flow. Second operand 7 states and 143 transitions. [2024-06-27 19:55:47,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 94 transitions, 691 flow [2024-06-27 19:55:47,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 94 transitions, 651 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 19:55:47,380 INFO L231 Difference]: Finished difference. Result has 68 places, 69 transitions, 440 flow [2024-06-27 19:55:47,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=440, PETRI_PLACES=68, PETRI_TRANSITIONS=69} [2024-06-27 19:55:47,381 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 24 predicate places. [2024-06-27 19:55:47,381 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 69 transitions, 440 flow [2024-06-27 19:55:47,381 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 19:55:47,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:47,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:47,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 19:55:47,382 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 19:55:47,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:47,382 INFO L85 PathProgramCache]: Analyzing trace with hash 199746596, now seen corresponding path program 2 times [2024-06-27 19:55:47,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:47,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703592006] [2024-06-27 19:55:47,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:47,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:47,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:48,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:48,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:48,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703592006] [2024-06-27 19:55:48,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703592006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:48,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:48,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:55:48,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061445055] [2024-06-27 19:55:48,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:48,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:55:48,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:48,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:55:48,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:55:48,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:55:48,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 69 transitions, 440 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 19:55:48,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:48,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:55:48,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:48,595 INFO L124 PetriNetUnfolderBase]: 1867/2815 cut-off events. [2024-06-27 19:55:48,595 INFO L125 PetriNetUnfolderBase]: For 18516/18522 co-relation queries the response was YES. [2024-06-27 19:55:48,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11653 conditions, 2815 events. 1867/2815 cut-off events. For 18516/18522 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13848 event pairs, 745 based on Foata normal form. 3/2807 useless extension candidates. Maximal degree in co-relation 11626. Up to 2608 conditions per place. [2024-06-27 19:55:48,610 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 59 selfloop transitions, 34 changer transitions 0/98 dead transitions. [2024-06-27 19:55:48,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 98 transitions, 822 flow [2024-06-27 19:55:48,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:55:48,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:55:48,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-27 19:55:48,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4750830564784053 [2024-06-27 19:55:48,612 INFO L175 Difference]: Start difference. First operand has 68 places, 69 transitions, 440 flow. Second operand 7 states and 143 transitions. [2024-06-27 19:55:48,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 98 transitions, 822 flow [2024-06-27 19:55:48,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 98 transitions, 786 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-27 19:55:48,621 INFO L231 Difference]: Finished difference. Result has 72 places, 75 transitions, 542 flow [2024-06-27 19:55:48,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=542, PETRI_PLACES=72, PETRI_TRANSITIONS=75} [2024-06-27 19:55:48,622 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 28 predicate places. [2024-06-27 19:55:48,622 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 75 transitions, 542 flow [2024-06-27 19:55:48,622 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 19:55:48,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:48,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:48,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 19:55:48,623 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 19:55:48,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:48,623 INFO L85 PathProgramCache]: Analyzing trace with hash 703562600, now seen corresponding path program 3 times [2024-06-27 19:55:48,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:48,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021738069] [2024-06-27 19:55:48,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:48,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:48,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:49,272 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 19:55:49,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:49,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021738069] [2024-06-27 19:55:49,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021738069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:49,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:49,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:55:49,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18040881] [2024-06-27 19:55:49,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:49,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:55:49,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:49,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:55:49,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:55:49,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:55:49,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 75 transitions, 542 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 19:55:49,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:49,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:55:49,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:49,887 INFO L124 PetriNetUnfolderBase]: 1862/2808 cut-off events. [2024-06-27 19:55:49,888 INFO L125 PetriNetUnfolderBase]: For 21860/21866 co-relation queries the response was YES. [2024-06-27 19:55:49,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12123 conditions, 2808 events. 1862/2808 cut-off events. For 21860/21866 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13802 event pairs, 745 based on Foata normal form. 3/2800 useless extension candidates. Maximal degree in co-relation 12094. Up to 2605 conditions per place. [2024-06-27 19:55:49,904 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 58 selfloop transitions, 33 changer transitions 0/96 dead transitions. [2024-06-27 19:55:49,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 96 transitions, 820 flow [2024-06-27 19:55:49,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:55:49,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:55:49,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-27 19:55:49,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4684385382059801 [2024-06-27 19:55:49,905 INFO L175 Difference]: Start difference. First operand has 72 places, 75 transitions, 542 flow. Second operand 7 states and 141 transitions. [2024-06-27 19:55:49,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 96 transitions, 820 flow [2024-06-27 19:55:49,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 96 transitions, 758 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 19:55:49,921 INFO L231 Difference]: Finished difference. Result has 76 places, 75 transitions, 554 flow [2024-06-27 19:55:49,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=554, PETRI_PLACES=76, PETRI_TRANSITIONS=75} [2024-06-27 19:55:49,922 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 32 predicate places. [2024-06-27 19:55:49,922 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 75 transitions, 554 flow [2024-06-27 19:55:49,922 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 19:55:49,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:49,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:49,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 19:55:49,923 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:55:49,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:49,923 INFO L85 PathProgramCache]: Analyzing trace with hash 376619089, now seen corresponding path program 1 times [2024-06-27 19:55:49,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:49,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798359716] [2024-06-27 19:55:49,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:49,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:49,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:50,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:50,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:50,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798359716] [2024-06-27 19:55:50,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798359716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:50,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:50,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:55:50,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556908037] [2024-06-27 19:55:50,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:50,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:55:50,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:50,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:55:50,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:55:50,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:55:50,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 75 transitions, 554 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:50,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:50,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:55:50,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:51,017 INFO L124 PetriNetUnfolderBase]: 1534/2473 cut-off events. [2024-06-27 19:55:51,017 INFO L125 PetriNetUnfolderBase]: For 20486/20486 co-relation queries the response was YES. [2024-06-27 19:55:51,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10554 conditions, 2473 events. 1534/2473 cut-off events. For 20486/20486 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 13040 event pairs, 581 based on Foata normal form. 1/2471 useless extension candidates. Maximal degree in co-relation 10523. Up to 2252 conditions per place. [2024-06-27 19:55:51,032 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 66 selfloop transitions, 8 changer transitions 0/86 dead transitions. [2024-06-27 19:55:51,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 86 transitions, 744 flow [2024-06-27 19:55:51,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:55:51,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:55:51,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 101 transitions. [2024-06-27 19:55:51,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697674418604651 [2024-06-27 19:55:51,034 INFO L175 Difference]: Start difference. First operand has 76 places, 75 transitions, 554 flow. Second operand 5 states and 101 transitions. [2024-06-27 19:55:51,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 86 transitions, 744 flow [2024-06-27 19:55:51,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 86 transitions, 663 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 19:55:51,047 INFO L231 Difference]: Finished difference. Result has 75 places, 78 transitions, 523 flow [2024-06-27 19:55:51,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=473, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=523, PETRI_PLACES=75, PETRI_TRANSITIONS=78} [2024-06-27 19:55:51,048 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 31 predicate places. [2024-06-27 19:55:51,048 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 78 transitions, 523 flow [2024-06-27 19:55:51,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:51,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:51,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:51,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 19:55:51,049 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 19:55:51,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:51,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1108291981, now seen corresponding path program 1 times [2024-06-27 19:55:51,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:51,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910604139] [2024-06-27 19:55:51,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:51,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:51,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:51,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:51,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:51,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910604139] [2024-06-27 19:55:51,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910604139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:51,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:51,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:55:51,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452653088] [2024-06-27 19:55:51,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:51,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:55:51,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:51,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:55:51,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:55:51,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:55:51,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 78 transitions, 523 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 19:55:51,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:51,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:55:51,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:52,641 INFO L124 PetriNetUnfolderBase]: 1903/2881 cut-off events. [2024-06-27 19:55:52,649 INFO L125 PetriNetUnfolderBase]: For 27730/27733 co-relation queries the response was YES. [2024-06-27 19:55:52,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12922 conditions, 2881 events. 1903/2881 cut-off events. For 27730/27733 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14341 event pairs, 642 based on Foata normal form. 8/2885 useless extension candidates. Maximal degree in co-relation 12890. Up to 2522 conditions per place. [2024-06-27 19:55:52,684 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 76 selfloop transitions, 36 changer transitions 0/117 dead transitions. [2024-06-27 19:55:52,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 117 transitions, 941 flow [2024-06-27 19:55:52,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:55:52,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:55:52,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-27 19:55:52,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48255813953488375 [2024-06-27 19:55:52,686 INFO L175 Difference]: Start difference. First operand has 75 places, 78 transitions, 523 flow. Second operand 8 states and 166 transitions. [2024-06-27 19:55:52,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 117 transitions, 941 flow [2024-06-27 19:55:52,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 117 transitions, 913 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 19:55:52,699 INFO L231 Difference]: Finished difference. Result has 80 places, 85 transitions, 644 flow [2024-06-27 19:55:52,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=644, PETRI_PLACES=80, PETRI_TRANSITIONS=85} [2024-06-27 19:55:52,700 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 36 predicate places. [2024-06-27 19:55:52,700 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 85 transitions, 644 flow [2024-06-27 19:55:52,700 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 19:55:52,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:52,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:52,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 19:55:52,701 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 19:55:52,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:52,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1740222124, now seen corresponding path program 1 times [2024-06-27 19:55:52,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:52,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091478909] [2024-06-27 19:55:52,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:52,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:52,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:53,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:53,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:53,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091478909] [2024-06-27 19:55:53,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091478909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:53,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:53,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:55:53,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155360955] [2024-06-27 19:55:53,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:53,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:55:53,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:53,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:55:53,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:55:53,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:55:53,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 85 transitions, 644 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:53,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:53,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:55:53,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:53,999 INFO L124 PetriNetUnfolderBase]: 1914/2902 cut-off events. [2024-06-27 19:55:53,999 INFO L125 PetriNetUnfolderBase]: For 32075/32078 co-relation queries the response was YES. [2024-06-27 19:55:54,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13939 conditions, 2902 events. 1914/2902 cut-off events. For 32075/32078 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14412 event pairs, 696 based on Foata normal form. 2/2900 useless extension candidates. Maximal degree in co-relation 13906. Up to 2677 conditions per place. [2024-06-27 19:55:54,013 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 74 selfloop transitions, 36 changer transitions 0/115 dead transitions. [2024-06-27 19:55:54,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 115 transitions, 1024 flow [2024-06-27 19:55:54,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:55:54,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:55:54,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-27 19:55:54,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4850498338870432 [2024-06-27 19:55:54,015 INFO L175 Difference]: Start difference. First operand has 80 places, 85 transitions, 644 flow. Second operand 7 states and 146 transitions. [2024-06-27 19:55:54,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 115 transitions, 1024 flow [2024-06-27 19:55:54,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 115 transitions, 975 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 19:55:54,039 INFO L231 Difference]: Finished difference. Result has 83 places, 88 transitions, 713 flow [2024-06-27 19:55:54,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=595, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=713, PETRI_PLACES=83, PETRI_TRANSITIONS=88} [2024-06-27 19:55:54,040 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 39 predicate places. [2024-06-27 19:55:54,040 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 88 transitions, 713 flow [2024-06-27 19:55:54,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:54,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:54,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:54,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 19:55:54,041 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 19:55:54,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:54,041 INFO L85 PathProgramCache]: Analyzing trace with hash -26630006, now seen corresponding path program 2 times [2024-06-27 19:55:54,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:54,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334602348] [2024-06-27 19:55:54,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:54,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:54,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:54,669 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 19:55:54,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:54,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334602348] [2024-06-27 19:55:54,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334602348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:54,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:54,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:55:54,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360492693] [2024-06-27 19:55:54,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:54,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:55:54,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:54,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:55:54,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:55:54,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:55:54,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 88 transitions, 713 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:54,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:54,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:55:54,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:55,354 INFO L124 PetriNetUnfolderBase]: 1925/2923 cut-off events. [2024-06-27 19:55:55,354 INFO L125 PetriNetUnfolderBase]: For 36178/36181 co-relation queries the response was YES. [2024-06-27 19:55:55,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14340 conditions, 2923 events. 1925/2923 cut-off events. For 36178/36181 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14551 event pairs, 696 based on Foata normal form. 2/2921 useless extension candidates. Maximal degree in co-relation 14305. Up to 2689 conditions per place. [2024-06-27 19:55:55,383 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 74 selfloop transitions, 36 changer transitions 0/115 dead transitions. [2024-06-27 19:55:55,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 115 transitions, 1095 flow [2024-06-27 19:55:55,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:55:55,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:55:55,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-27 19:55:55,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4717607973421927 [2024-06-27 19:55:55,387 INFO L175 Difference]: Start difference. First operand has 83 places, 88 transitions, 713 flow. Second operand 7 states and 142 transitions. [2024-06-27 19:55:55,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 115 transitions, 1095 flow [2024-06-27 19:55:55,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 115 transitions, 975 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 19:55:55,413 INFO L231 Difference]: Finished difference. Result has 84 places, 91 transitions, 718 flow [2024-06-27 19:55:55,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=718, PETRI_PLACES=84, PETRI_TRANSITIONS=91} [2024-06-27 19:55:55,413 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 40 predicate places. [2024-06-27 19:55:55,414 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 91 transitions, 718 flow [2024-06-27 19:55:55,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:55,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:55,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:55,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 19:55:55,415 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:55:55,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:55,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1897444975, now seen corresponding path program 2 times [2024-06-27 19:55:55,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:55,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124100246] [2024-06-27 19:55:55,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:55,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:55,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:56,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:56,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:56,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124100246] [2024-06-27 19:55:56,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124100246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:56,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:56,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:55:56,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497811172] [2024-06-27 19:55:56,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:56,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:55:56,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:56,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:55:56,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:55:56,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:55:56,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 91 transitions, 718 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 19:55:56,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:56,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:55:56,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:56,914 INFO L124 PetriNetUnfolderBase]: 1947/2944 cut-off events. [2024-06-27 19:55:56,914 INFO L125 PetriNetUnfolderBase]: For 40476/40482 co-relation queries the response was YES. [2024-06-27 19:55:56,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14696 conditions, 2944 events. 1947/2944 cut-off events. For 40476/40482 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14597 event pairs, 662 based on Foata normal form. 5/2936 useless extension candidates. Maximal degree in co-relation 14661. Up to 2545 conditions per place. [2024-06-27 19:55:56,929 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 70 selfloop transitions, 52 changer transitions 0/127 dead transitions. [2024-06-27 19:55:56,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 127 transitions, 1226 flow [2024-06-27 19:55:56,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:55:56,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:55:56,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-27 19:55:56,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48255813953488375 [2024-06-27 19:55:56,932 INFO L175 Difference]: Start difference. First operand has 84 places, 91 transitions, 718 flow. Second operand 8 states and 166 transitions. [2024-06-27 19:55:56,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 127 transitions, 1226 flow [2024-06-27 19:55:56,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 127 transitions, 1160 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 19:55:56,959 INFO L231 Difference]: Finished difference. Result has 88 places, 97 transitions, 834 flow [2024-06-27 19:55:56,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=652, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=834, PETRI_PLACES=88, PETRI_TRANSITIONS=97} [2024-06-27 19:55:56,959 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 44 predicate places. [2024-06-27 19:55:56,959 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 97 transitions, 834 flow [2024-06-27 19:55:56,960 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 19:55:56,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:56,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:56,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 19:55:56,960 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 19:55:56,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:56,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1252182511, now seen corresponding path program 3 times [2024-06-27 19:55:56,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:56,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319269699] [2024-06-27 19:55:56,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:56,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:56,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:57,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:57,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:57,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319269699] [2024-06-27 19:55:57,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319269699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:57,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:57,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:55:57,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973881295] [2024-06-27 19:55:57,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:57,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:55:57,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:57,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:55:57,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:55:57,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:55:57,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 97 transitions, 834 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 19:55:57,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:57,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:55:57,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:58,385 INFO L124 PetriNetUnfolderBase]: 1969/2978 cut-off events. [2024-06-27 19:55:58,385 INFO L125 PetriNetUnfolderBase]: For 45938/45944 co-relation queries the response was YES. [2024-06-27 19:55:58,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15413 conditions, 2978 events. 1969/2978 cut-off events. For 45938/45944 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14827 event pairs, 660 based on Foata normal form. 5/2968 useless extension candidates. Maximal degree in co-relation 15377. Up to 2554 conditions per place. [2024-06-27 19:55:58,402 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 74 selfloop transitions, 52 changer transitions 0/131 dead transitions. [2024-06-27 19:55:58,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 131 transitions, 1332 flow [2024-06-27 19:55:58,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:55:58,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:55:58,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-27 19:55:58,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48546511627906974 [2024-06-27 19:55:58,404 INFO L175 Difference]: Start difference. First operand has 88 places, 97 transitions, 834 flow. Second operand 8 states and 167 transitions. [2024-06-27 19:55:58,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 131 transitions, 1332 flow [2024-06-27 19:55:58,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 131 transitions, 1238 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-27 19:55:58,429 INFO L231 Difference]: Finished difference. Result has 92 places, 100 transitions, 892 flow [2024-06-27 19:55:58,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=746, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=892, PETRI_PLACES=92, PETRI_TRANSITIONS=100} [2024-06-27 19:55:58,430 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 48 predicate places. [2024-06-27 19:55:58,430 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 100 transitions, 892 flow [2024-06-27 19:55:58,430 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 19:55:58,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:58,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:58,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 19:55:58,431 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 19:55:58,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:58,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1116836278, now seen corresponding path program 3 times [2024-06-27 19:55:58,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:58,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327093900] [2024-06-27 19:55:58,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:58,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:58,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:59,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:59,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:59,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327093900] [2024-06-27 19:55:59,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327093900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:59,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:59,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:55:59,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477520953] [2024-06-27 19:55:59,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:59,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:55:59,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:59,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:55:59,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:55:59,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:55:59,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 100 transitions, 892 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:59,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:59,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:55:59,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:59,863 INFO L124 PetriNetUnfolderBase]: 1964/2985 cut-off events. [2024-06-27 19:55:59,863 INFO L125 PetriNetUnfolderBase]: For 49622/49631 co-relation queries the response was YES. [2024-06-27 19:55:59,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15505 conditions, 2985 events. 1964/2985 cut-off events. For 49622/49631 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14902 event pairs, 717 based on Foata normal form. 5/2981 useless extension candidates. Maximal degree in co-relation 15467. Up to 2748 conditions per place. [2024-06-27 19:55:59,879 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 80 selfloop transitions, 34 changer transitions 0/119 dead transitions. [2024-06-27 19:55:59,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 119 transitions, 1168 flow [2024-06-27 19:55:59,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:55:59,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:55:59,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-27 19:55:59,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-27 19:55:59,881 INFO L175 Difference]: Start difference. First operand has 92 places, 100 transitions, 892 flow. Second operand 7 states and 136 transitions. [2024-06-27 19:55:59,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 119 transitions, 1168 flow [2024-06-27 19:55:59,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 119 transitions, 1052 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 19:55:59,911 INFO L231 Difference]: Finished difference. Result has 94 places, 100 transitions, 852 flow [2024-06-27 19:55:59,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=776, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=852, PETRI_PLACES=94, PETRI_TRANSITIONS=100} [2024-06-27 19:55:59,912 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 50 predicate places. [2024-06-27 19:55:59,912 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 100 transitions, 852 flow [2024-06-27 19:55:59,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:59,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:59,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:59,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 19:55:59,913 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 19:55:59,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:59,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1897178065, now seen corresponding path program 4 times [2024-06-27 19:55:59,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:59,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553323576] [2024-06-27 19:55:59,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:59,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:59,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:00,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:00,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:00,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553323576] [2024-06-27 19:56:00,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553323576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:00,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:00,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:56:00,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099992670] [2024-06-27 19:56:00,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:00,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:56:00,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:00,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:56:00,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:56:00,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:00,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 100 transitions, 852 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 19:56:00,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:00,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:00,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:01,419 INFO L124 PetriNetUnfolderBase]: 1954/2960 cut-off events. [2024-06-27 19:56:01,419 INFO L125 PetriNetUnfolderBase]: For 53330/53336 co-relation queries the response was YES. [2024-06-27 19:56:01,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15443 conditions, 2960 events. 1954/2960 cut-off events. For 53330/53336 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14739 event pairs, 660 based on Foata normal form. 5/2952 useless extension candidates. Maximal degree in co-relation 15404. Up to 2547 conditions per place. [2024-06-27 19:56:01,432 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 71 selfloop transitions, 53 changer transitions 0/129 dead transitions. [2024-06-27 19:56:01,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 129 transitions, 1244 flow [2024-06-27 19:56:01,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:56:01,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:56:01,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-27 19:56:01,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796511627906977 [2024-06-27 19:56:01,434 INFO L175 Difference]: Start difference. First operand has 94 places, 100 transitions, 852 flow. Second operand 8 states and 165 transitions. [2024-06-27 19:56:01,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 129 transitions, 1244 flow [2024-06-27 19:56:01,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 129 transitions, 1125 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 19:56:01,471 INFO L231 Difference]: Finished difference. Result has 95 places, 100 transitions, 847 flow [2024-06-27 19:56:01,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=733, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=847, PETRI_PLACES=95, PETRI_TRANSITIONS=100} [2024-06-27 19:56:01,471 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 51 predicate places. [2024-06-27 19:56:01,472 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 100 transitions, 847 flow [2024-06-27 19:56:01,472 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 19:56:01,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:01,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:01,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 19:56:01,472 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:01,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:01,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1168597567, now seen corresponding path program 1 times [2024-06-27 19:56:01,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:01,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794491357] [2024-06-27 19:56:01,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:01,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:01,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:02,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:02,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:02,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794491357] [2024-06-27 19:56:02,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794491357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:02,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:02,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:56:02,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91408710] [2024-06-27 19:56:02,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:02,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:56:02,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:02,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:56:02,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:56:02,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:56:02,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 100 transitions, 847 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:02,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:02,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:56:02,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:02,802 INFO L124 PetriNetUnfolderBase]: 1612/2607 cut-off events. [2024-06-27 19:56:02,803 INFO L125 PetriNetUnfolderBase]: For 48359/48359 co-relation queries the response was YES. [2024-06-27 19:56:02,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13562 conditions, 2607 events. 1612/2607 cut-off events. For 48359/48359 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 13713 event pairs, 545 based on Foata normal form. 2/2606 useless extension candidates. Maximal degree in co-relation 13522. Up to 2358 conditions per place. [2024-06-27 19:56:02,817 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 88 selfloop transitions, 11 changer transitions 0/113 dead transitions. [2024-06-27 19:56:02,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 113 transitions, 1095 flow [2024-06-27 19:56:02,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:56:02,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:56:02,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-27 19:56:02,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-27 19:56:02,818 INFO L175 Difference]: Start difference. First operand has 95 places, 100 transitions, 847 flow. Second operand 6 states and 118 transitions. [2024-06-27 19:56:02,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 113 transitions, 1095 flow [2024-06-27 19:56:02,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 113 transitions, 962 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 19:56:02,856 INFO L231 Difference]: Finished difference. Result has 93 places, 103 transitions, 774 flow [2024-06-27 19:56:02,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=714, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=774, PETRI_PLACES=93, PETRI_TRANSITIONS=103} [2024-06-27 19:56:02,857 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 49 predicate places. [2024-06-27 19:56:02,857 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 103 transitions, 774 flow [2024-06-27 19:56:02,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:02,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:02,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:02,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 19:56:02,857 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 19:56:02,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:02,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1021438675, now seen corresponding path program 1 times [2024-06-27 19:56:02,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:02,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774860361] [2024-06-27 19:56:02,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:02,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:02,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:03,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:03,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:03,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774860361] [2024-06-27 19:56:03,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774860361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:03,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:03,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:56:03,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434965822] [2024-06-27 19:56:03,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:03,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:56:03,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:03,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:56:03,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:56:03,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:56:03,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 103 transitions, 774 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:03,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:03,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:56:03,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:04,186 INFO L124 PetriNetUnfolderBase]: 1859/2879 cut-off events. [2024-06-27 19:56:04,186 INFO L125 PetriNetUnfolderBase]: For 60730/60733 co-relation queries the response was YES. [2024-06-27 19:56:04,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15574 conditions, 2879 events. 1859/2879 cut-off events. For 60730/60733 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14760 event pairs, 444 based on Foata normal form. 6/2881 useless extension candidates. Maximal degree in co-relation 15533. Up to 2550 conditions per place. [2024-06-27 19:56:04,202 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 97 selfloop transitions, 23 changer transitions 0/133 dead transitions. [2024-06-27 19:56:04,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 133 transitions, 1206 flow [2024-06-27 19:56:04,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:56:04,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:56:04,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-27 19:56:04,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4850498338870432 [2024-06-27 19:56:04,204 INFO L175 Difference]: Start difference. First operand has 93 places, 103 transitions, 774 flow. Second operand 7 states and 146 transitions. [2024-06-27 19:56:04,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 133 transitions, 1206 flow [2024-06-27 19:56:04,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 133 transitions, 1168 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 19:56:04,234 INFO L231 Difference]: Finished difference. Result has 96 places, 107 transitions, 841 flow [2024-06-27 19:56:04,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=736, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=841, PETRI_PLACES=96, PETRI_TRANSITIONS=107} [2024-06-27 19:56:04,234 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 52 predicate places. [2024-06-27 19:56:04,234 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 107 transitions, 841 flow [2024-06-27 19:56:04,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:04,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:04,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:04,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 19:56:04,235 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 19:56:04,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:04,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1024117075, now seen corresponding path program 2 times [2024-06-27 19:56:04,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:04,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449407198] [2024-06-27 19:56:04,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:04,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:04,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:04,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:04,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:04,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449407198] [2024-06-27 19:56:04,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449407198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:04,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:04,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:56:04,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21829303] [2024-06-27 19:56:04,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:04,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:56:04,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:04,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:56:04,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:56:04,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:56:04,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 107 transitions, 841 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:04,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:04,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:56:04,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:05,449 INFO L124 PetriNetUnfolderBase]: 1851/2867 cut-off events. [2024-06-27 19:56:05,449 INFO L125 PetriNetUnfolderBase]: For 65529/65532 co-relation queries the response was YES. [2024-06-27 19:56:05,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15876 conditions, 2867 events. 1851/2867 cut-off events. For 65529/65532 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14713 event pairs, 603 based on Foata normal form. 6/2869 useless extension candidates. Maximal degree in co-relation 15834. Up to 2615 conditions per place. [2024-06-27 19:56:05,465 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 96 selfloop transitions, 21 changer transitions 0/130 dead transitions. [2024-06-27 19:56:05,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 130 transitions, 1133 flow [2024-06-27 19:56:05,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:56:05,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:56:05,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-27 19:56:05,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47840531561461797 [2024-06-27 19:56:05,467 INFO L175 Difference]: Start difference. First operand has 96 places, 107 transitions, 841 flow. Second operand 7 states and 144 transitions. [2024-06-27 19:56:05,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 130 transitions, 1133 flow [2024-06-27 19:56:05,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 130 transitions, 1078 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 19:56:05,519 INFO L231 Difference]: Finished difference. Result has 100 places, 107 transitions, 835 flow [2024-06-27 19:56:05,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=786, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=835, PETRI_PLACES=100, PETRI_TRANSITIONS=107} [2024-06-27 19:56:05,520 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 56 predicate places. [2024-06-27 19:56:05,520 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 107 transitions, 835 flow [2024-06-27 19:56:05,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:05,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:05,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:05,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 19:56:05,520 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 19:56:05,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:05,521 INFO L85 PathProgramCache]: Analyzing trace with hash -906024435, now seen corresponding path program 1 times [2024-06-27 19:56:05,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:05,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417306423] [2024-06-27 19:56:05,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:05,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:05,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:06,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:06,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:06,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417306423] [2024-06-27 19:56:06,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417306423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:06,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:06,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:56:06,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083769052] [2024-06-27 19:56:06,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:06,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:56:06,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:06,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:56:06,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:56:06,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:06,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 107 transitions, 835 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:06,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:06,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:06,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:07,150 INFO L124 PetriNetUnfolderBase]: 1976/3011 cut-off events. [2024-06-27 19:56:07,150 INFO L125 PetriNetUnfolderBase]: For 71496/71499 co-relation queries the response was YES. [2024-06-27 19:56:07,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16732 conditions, 3011 events. 1976/3011 cut-off events. For 71496/71499 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 15130 event pairs, 591 based on Foata normal form. 4/3011 useless extension candidates. Maximal degree in co-relation 16688. Up to 2569 conditions per place. [2024-06-27 19:56:07,165 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 85 selfloop transitions, 55 changer transitions 0/145 dead transitions. [2024-06-27 19:56:07,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 145 transitions, 1327 flow [2024-06-27 19:56:07,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:56:07,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:56:07,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-27 19:56:07,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4941860465116279 [2024-06-27 19:56:07,166 INFO L175 Difference]: Start difference. First operand has 100 places, 107 transitions, 835 flow. Second operand 8 states and 170 transitions. [2024-06-27 19:56:07,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 145 transitions, 1327 flow [2024-06-27 19:56:07,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 145 transitions, 1277 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 19:56:07,207 INFO L231 Difference]: Finished difference. Result has 102 places, 110 transitions, 941 flow [2024-06-27 19:56:07,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=785, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=941, PETRI_PLACES=102, PETRI_TRANSITIONS=110} [2024-06-27 19:56:07,207 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 58 predicate places. [2024-06-27 19:56:07,207 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 110 transitions, 941 flow [2024-06-27 19:56:07,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:07,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:07,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:07,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 19:56:07,208 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 19:56:07,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:07,209 INFO L85 PathProgramCache]: Analyzing trace with hash -905851455, now seen corresponding path program 2 times [2024-06-27 19:56:07,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:07,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47695287] [2024-06-27 19:56:07,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:07,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:07,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:07,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:07,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:07,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47695287] [2024-06-27 19:56:07,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47695287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:07,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:07,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:56:07,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051647564] [2024-06-27 19:56:07,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:07,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:56:07,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:07,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:56:07,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:56:08,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:08,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 110 transitions, 941 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:08,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:08,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:08,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:08,723 INFO L124 PetriNetUnfolderBase]: 2030/3109 cut-off events. [2024-06-27 19:56:08,723 INFO L125 PetriNetUnfolderBase]: For 79190/79193 co-relation queries the response was YES. [2024-06-27 19:56:08,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17706 conditions, 3109 events. 2030/3109 cut-off events. For 79190/79193 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15840 event pairs, 589 based on Foata normal form. 4/3109 useless extension candidates. Maximal degree in co-relation 17661. Up to 2615 conditions per place. [2024-06-27 19:56:08,743 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 90 selfloop transitions, 56 changer transitions 0/151 dead transitions. [2024-06-27 19:56:08,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 151 transitions, 1589 flow [2024-06-27 19:56:08,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:56:08,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:56:08,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-27 19:56:08,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4941860465116279 [2024-06-27 19:56:08,745 INFO L175 Difference]: Start difference. First operand has 102 places, 110 transitions, 941 flow. Second operand 8 states and 170 transitions. [2024-06-27 19:56:08,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 151 transitions, 1589 flow [2024-06-27 19:56:08,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 151 transitions, 1404 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 19:56:08,803 INFO L231 Difference]: Finished difference. Result has 103 places, 116 transitions, 964 flow [2024-06-27 19:56:08,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=774, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=964, PETRI_PLACES=103, PETRI_TRANSITIONS=116} [2024-06-27 19:56:08,804 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 59 predicate places. [2024-06-27 19:56:08,804 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 116 transitions, 964 flow [2024-06-27 19:56:08,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:08,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:08,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:08,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 19:56:08,805 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 19:56:08,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:08,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1887869379, now seen corresponding path program 3 times [2024-06-27 19:56:08,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:08,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390726046] [2024-06-27 19:56:08,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:08,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:08,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:09,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:09,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:09,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390726046] [2024-06-27 19:56:09,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390726046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:09,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:09,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:56:09,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368665928] [2024-06-27 19:56:09,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:09,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:56:09,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:09,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:56:09,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:56:09,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:09,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 116 transitions, 964 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:09,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:09,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:09,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:10,253 INFO L124 PetriNetUnfolderBase]: 2020/3095 cut-off events. [2024-06-27 19:56:10,254 INFO L125 PetriNetUnfolderBase]: For 83122/83125 co-relation queries the response was YES. [2024-06-27 19:56:10,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17678 conditions, 3095 events. 2020/3095 cut-off events. For 83122/83125 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 15729 event pairs, 589 based on Foata normal form. 4/3095 useless extension candidates. Maximal degree in co-relation 17633. Up to 2607 conditions per place. [2024-06-27 19:56:10,273 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 86 selfloop transitions, 57 changer transitions 0/148 dead transitions. [2024-06-27 19:56:10,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 148 transitions, 1424 flow [2024-06-27 19:56:10,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:56:10,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:56:10,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-27 19:56:10,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48255813953488375 [2024-06-27 19:56:10,277 INFO L175 Difference]: Start difference. First operand has 103 places, 116 transitions, 964 flow. Second operand 8 states and 166 transitions. [2024-06-27 19:56:10,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 148 transitions, 1424 flow [2024-06-27 19:56:10,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 148 transitions, 1313 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-27 19:56:10,337 INFO L231 Difference]: Finished difference. Result has 107 places, 116 transitions, 976 flow [2024-06-27 19:56:10,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=976, PETRI_PLACES=107, PETRI_TRANSITIONS=116} [2024-06-27 19:56:10,338 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 63 predicate places. [2024-06-27 19:56:10,338 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 116 transitions, 976 flow [2024-06-27 19:56:10,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:10,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:10,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:10,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 19:56:10,339 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:10,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:10,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1140374768, now seen corresponding path program 1 times [2024-06-27 19:56:10,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:10,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087964397] [2024-06-27 19:56:10,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:10,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:10,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:10,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:10,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:10,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087964397] [2024-06-27 19:56:10,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087964397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:10,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:10,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:56:10,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921400573] [2024-06-27 19:56:10,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:10,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:56:10,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:10,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:56:10,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:56:11,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:56:11,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 116 transitions, 976 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 19:56:11,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:11,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:56:11,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:11,420 INFO L124 PetriNetUnfolderBase]: 1918/2990 cut-off events. [2024-06-27 19:56:11,420 INFO L125 PetriNetUnfolderBase]: For 88328/88328 co-relation queries the response was YES. [2024-06-27 19:56:11,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17510 conditions, 2990 events. 1918/2990 cut-off events. For 88328/88328 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15561 event pairs, 608 based on Foata normal form. 1/2988 useless extension candidates. Maximal degree in co-relation 17464. Up to 2794 conditions per place. [2024-06-27 19:56:11,438 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 110 selfloop transitions, 11 changer transitions 0/134 dead transitions. [2024-06-27 19:56:11,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 134 transitions, 1284 flow [2024-06-27 19:56:11,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:56:11,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:56:11,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-27 19:56:11,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-27 19:56:11,440 INFO L175 Difference]: Start difference. First operand has 107 places, 116 transitions, 976 flow. Second operand 6 states and 118 transitions. [2024-06-27 19:56:11,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 134 transitions, 1284 flow [2024-06-27 19:56:11,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 134 transitions, 1161 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 19:56:11,518 INFO L231 Difference]: Finished difference. Result has 106 places, 119 transitions, 915 flow [2024-06-27 19:56:11,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=915, PETRI_PLACES=106, PETRI_TRANSITIONS=119} [2024-06-27 19:56:11,519 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 62 predicate places. [2024-06-27 19:56:11,519 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 119 transitions, 915 flow [2024-06-27 19:56:11,519 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 19:56:11,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:11,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:11,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 19:56:11,520 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 19:56:11,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:11,520 INFO L85 PathProgramCache]: Analyzing trace with hash 169439595, now seen corresponding path program 4 times [2024-06-27 19:56:11,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:11,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069200318] [2024-06-27 19:56:11,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:11,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:11,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:12,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:12,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:12,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069200318] [2024-06-27 19:56:12,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069200318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:12,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:12,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:56:12,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753648470] [2024-06-27 19:56:12,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:12,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:56:12,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:12,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:56:12,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:56:12,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:12,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 119 transitions, 915 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:12,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:12,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:12,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:13,036 INFO L124 PetriNetUnfolderBase]: 2047/3144 cut-off events. [2024-06-27 19:56:13,037 INFO L125 PetriNetUnfolderBase]: For 95191/95200 co-relation queries the response was YES. [2024-06-27 19:56:13,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18378 conditions, 3144 events. 2047/3144 cut-off events. For 95191/95200 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16074 event pairs, 618 based on Foata normal form. 7/3142 useless extension candidates. Maximal degree in co-relation 18331. Up to 2633 conditions per place. [2024-06-27 19:56:13,056 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 85 selfloop transitions, 60 changer transitions 0/150 dead transitions. [2024-06-27 19:56:13,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 150 transitions, 1413 flow [2024-06-27 19:56:13,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:56:13,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:56:13,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 19:56:13,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 19:56:13,058 INFO L175 Difference]: Start difference. First operand has 106 places, 119 transitions, 915 flow. Second operand 8 states and 160 transitions. [2024-06-27 19:56:13,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 150 transitions, 1413 flow [2024-06-27 19:56:13,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 150 transitions, 1373 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 19:56:13,144 INFO L231 Difference]: Finished difference. Result has 110 places, 122 transitions, 1041 flow [2024-06-27 19:56:13,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=875, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1041, PETRI_PLACES=110, PETRI_TRANSITIONS=122} [2024-06-27 19:56:13,145 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 66 predicate places. [2024-06-27 19:56:13,145 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 122 transitions, 1041 flow [2024-06-27 19:56:13,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:13,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:13,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:13,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 19:56:13,145 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:13,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:13,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1317021461, now seen corresponding path program 5 times [2024-06-27 19:56:13,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:13,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184461870] [2024-06-27 19:56:13,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:13,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:13,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:13,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:13,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:13,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184461870] [2024-06-27 19:56:13,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184461870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:13,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:13,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:56:13,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75645067] [2024-06-27 19:56:13,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:13,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:56:13,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:13,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:56:13,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:56:13,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:13,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 122 transitions, 1041 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:13,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:13,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:13,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:14,689 INFO L124 PetriNetUnfolderBase]: 2069/3181 cut-off events. [2024-06-27 19:56:14,689 INFO L125 PetriNetUnfolderBase]: For 102750/102759 co-relation queries the response was YES. [2024-06-27 19:56:14,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19089 conditions, 3181 events. 2069/3181 cut-off events. For 102750/102759 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 16310 event pairs, 613 based on Foata normal form. 7/3179 useless extension candidates. Maximal degree in co-relation 19041. Up to 2652 conditions per place. [2024-06-27 19:56:14,708 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 90 selfloop transitions, 59 changer transitions 0/154 dead transitions. [2024-06-27 19:56:14,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 154 transitions, 1559 flow [2024-06-27 19:56:14,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:56:14,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:56:14,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-27 19:56:14,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738372093023256 [2024-06-27 19:56:14,710 INFO L175 Difference]: Start difference. First operand has 110 places, 122 transitions, 1041 flow. Second operand 8 states and 163 transitions. [2024-06-27 19:56:14,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 154 transitions, 1559 flow [2024-06-27 19:56:14,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 154 transitions, 1433 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 19:56:14,761 INFO L231 Difference]: Finished difference. Result has 113 places, 125 transitions, 1085 flow [2024-06-27 19:56:14,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=926, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1085, PETRI_PLACES=113, PETRI_TRANSITIONS=125} [2024-06-27 19:56:14,762 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 69 predicate places. [2024-06-27 19:56:14,762 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 125 transitions, 1085 flow [2024-06-27 19:56:14,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:14,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:14,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:14,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 19:56:14,762 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 19:56:14,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:14,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1317027971, now seen corresponding path program 6 times [2024-06-27 19:56:14,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:14,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8819809] [2024-06-27 19:56:14,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:14,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:14,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:15,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:15,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:15,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8819809] [2024-06-27 19:56:15,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8819809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:15,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:15,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:56:15,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220543281] [2024-06-27 19:56:15,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:15,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:56:15,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:15,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:56:15,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:56:15,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:15,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 125 transitions, 1085 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:15,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:15,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:15,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:16,404 INFO L124 PetriNetUnfolderBase]: 2059/3167 cut-off events. [2024-06-27 19:56:16,405 INFO L125 PetriNetUnfolderBase]: For 108026/108035 co-relation queries the response was YES. [2024-06-27 19:56:16,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19081 conditions, 3167 events. 2059/3167 cut-off events. For 108026/108035 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 16169 event pairs, 611 based on Foata normal form. 7/3165 useless extension candidates. Maximal degree in co-relation 19032. Up to 2644 conditions per place. [2024-06-27 19:56:16,427 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 87 selfloop transitions, 60 changer transitions 0/152 dead transitions. [2024-06-27 19:56:16,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 152 transitions, 1445 flow [2024-06-27 19:56:16,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:56:16,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:56:16,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 19:56:16,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 19:56:16,428 INFO L175 Difference]: Start difference. First operand has 113 places, 125 transitions, 1085 flow. Second operand 8 states and 160 transitions. [2024-06-27 19:56:16,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 152 transitions, 1445 flow [2024-06-27 19:56:16,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 152 transitions, 1254 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 19:56:16,489 INFO L231 Difference]: Finished difference. Result has 114 places, 125 transitions, 1022 flow [2024-06-27 19:56:16,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=894, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1022, PETRI_PLACES=114, PETRI_TRANSITIONS=125} [2024-06-27 19:56:16,490 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 70 predicate places. [2024-06-27 19:56:16,490 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 125 transitions, 1022 flow [2024-06-27 19:56:16,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:16,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:16,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:16,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 19:56:16,491 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:16,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:16,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1342382994, now seen corresponding path program 2 times [2024-06-27 19:56:16,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:16,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256819098] [2024-06-27 19:56:16,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:16,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:16,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:17,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:17,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:17,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256819098] [2024-06-27 19:56:17,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256819098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:17,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:17,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:56:17,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716056457] [2024-06-27 19:56:17,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:17,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:56:17,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:17,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:56:17,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:56:17,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:56:17,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 125 transitions, 1022 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 19:56:17,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:17,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:56:17,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:17,628 INFO L124 PetriNetUnfolderBase]: 1945/3049 cut-off events. [2024-06-27 19:56:17,629 INFO L125 PetriNetUnfolderBase]: For 112260/112269 co-relation queries the response was YES. [2024-06-27 19:56:17,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18744 conditions, 3049 events. 1945/3049 cut-off events. For 112260/112269 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15973 event pairs, 618 based on Foata normal form. 7/3051 useless extension candidates. Maximal degree in co-relation 18694. Up to 2830 conditions per place. [2024-06-27 19:56:17,648 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 108 selfloop transitions, 16 changer transitions 0/137 dead transitions. [2024-06-27 19:56:17,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 137 transitions, 1326 flow [2024-06-27 19:56:17,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:56:17,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:56:17,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-27 19:56:17,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 19:56:17,649 INFO L175 Difference]: Start difference. First operand has 114 places, 125 transitions, 1022 flow. Second operand 6 states and 114 transitions. [2024-06-27 19:56:17,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 137 transitions, 1326 flow [2024-06-27 19:56:17,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 137 transitions, 1169 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 19:56:17,712 INFO L231 Difference]: Finished difference. Result has 112 places, 128 transitions, 943 flow [2024-06-27 19:56:17,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=865, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=943, PETRI_PLACES=112, PETRI_TRANSITIONS=128} [2024-06-27 19:56:17,712 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 68 predicate places. [2024-06-27 19:56:17,713 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 128 transitions, 943 flow [2024-06-27 19:56:17,713 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 19:56:17,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:17,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:17,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 19:56:17,713 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:17,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:17,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1146094640, now seen corresponding path program 1 times [2024-06-27 19:56:17,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:17,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309166914] [2024-06-27 19:56:17,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:17,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:17,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:18,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:18,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:18,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309166914] [2024-06-27 19:56:18,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309166914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:18,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:18,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:56:18,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413476970] [2024-06-27 19:56:18,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:18,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:56:18,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:18,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:56:18,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:56:18,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:56:18,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 128 transitions, 943 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:18,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:18,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:56:18,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:18,809 INFO L124 PetriNetUnfolderBase]: 1721/2807 cut-off events. [2024-06-27 19:56:18,809 INFO L125 PetriNetUnfolderBase]: For 100285/100285 co-relation queries the response was YES. [2024-06-27 19:56:18,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16854 conditions, 2807 events. 1721/2807 cut-off events. For 100285/100285 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 15190 event pairs, 519 based on Foata normal form. 1/2805 useless extension candidates. Maximal degree in co-relation 16803. Up to 2519 conditions per place. [2024-06-27 19:56:18,826 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 118 selfloop transitions, 11 changer transitions 0/143 dead transitions. [2024-06-27 19:56:18,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 143 transitions, 1261 flow [2024-06-27 19:56:18,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:56:18,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:56:18,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-27 19:56:18,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 19:56:18,828 INFO L175 Difference]: Start difference. First operand has 112 places, 128 transitions, 943 flow. Second operand 6 states and 120 transitions. [2024-06-27 19:56:18,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 143 transitions, 1261 flow [2024-06-27 19:56:18,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 143 transitions, 1205 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 19:56:18,903 INFO L231 Difference]: Finished difference. Result has 114 places, 131 transitions, 951 flow [2024-06-27 19:56:18,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=887, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=951, PETRI_PLACES=114, PETRI_TRANSITIONS=131} [2024-06-27 19:56:18,903 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 70 predicate places. [2024-06-27 19:56:18,903 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 131 transitions, 951 flow [2024-06-27 19:56:18,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:18,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:18,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:18,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 19:56:18,904 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:18,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:18,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1537710716, now seen corresponding path program 2 times [2024-06-27 19:56:18,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:18,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256861080] [2024-06-27 19:56:18,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:18,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:18,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:19,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:19,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:19,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256861080] [2024-06-27 19:56:19,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256861080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:19,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:19,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:56:19,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732421964] [2024-06-27 19:56:19,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:19,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:56:19,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:19,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:56:19,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:56:19,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:56:19,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 131 transitions, 951 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:19,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:19,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:56:19,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:19,944 INFO L124 PetriNetUnfolderBase]: 1718/2804 cut-off events. [2024-06-27 19:56:19,944 INFO L125 PetriNetUnfolderBase]: For 105541/105544 co-relation queries the response was YES. [2024-06-27 19:56:19,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17245 conditions, 2804 events. 1718/2804 cut-off events. For 105541/105544 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 15204 event pairs, 523 based on Foata normal form. 3/2803 useless extension candidates. Maximal degree in co-relation 17193. Up to 2509 conditions per place. [2024-06-27 19:56:19,962 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 113 selfloop transitions, 16 changer transitions 0/143 dead transitions. [2024-06-27 19:56:19,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 143 transitions, 1267 flow [2024-06-27 19:56:19,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:56:19,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:56:19,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-27 19:56:19,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2024-06-27 19:56:19,963 INFO L175 Difference]: Start difference. First operand has 114 places, 131 transitions, 951 flow. Second operand 6 states and 119 transitions. [2024-06-27 19:56:19,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 143 transitions, 1267 flow [2024-06-27 19:56:20,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 143 transitions, 1225 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 19:56:20,024 INFO L231 Difference]: Finished difference. Result has 116 places, 134 transitions, 989 flow [2024-06-27 19:56:20,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=989, PETRI_PLACES=116, PETRI_TRANSITIONS=134} [2024-06-27 19:56:20,024 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 72 predicate places. [2024-06-27 19:56:20,025 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 134 transitions, 989 flow [2024-06-27 19:56:20,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:20,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:20,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:20,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 19:56:20,025 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 19:56:20,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:20,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1308439421, now seen corresponding path program 1 times [2024-06-27 19:56:20,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:20,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785762236] [2024-06-27 19:56:20,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:20,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:20,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:20,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:20,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:20,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785762236] [2024-06-27 19:56:20,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785762236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:20,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:20,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:56:20,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033150403] [2024-06-27 19:56:20,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:20,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:56:20,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:20,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:56:20,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:56:21,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:56:21,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 134 transitions, 989 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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 19:56:21,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:21,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:56:21,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:21,700 INFO L124 PetriNetUnfolderBase]: 1809/2888 cut-off events. [2024-06-27 19:56:21,700 INFO L125 PetriNetUnfolderBase]: For 111060/111060 co-relation queries the response was YES. [2024-06-27 19:56:21,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17902 conditions, 2888 events. 1809/2888 cut-off events. For 111060/111060 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 15207 event pairs, 504 based on Foata normal form. 4/2889 useless extension candidates. Maximal degree in co-relation 17849. Up to 2635 conditions per place. [2024-06-27 19:56:21,720 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 142 selfloop transitions, 19 changer transitions 0/167 dead transitions. [2024-06-27 19:56:21,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 167 transitions, 1433 flow [2024-06-27 19:56:21,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:56:21,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:56:21,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 19:56:21,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-27 19:56:21,722 INFO L175 Difference]: Start difference. First operand has 116 places, 134 transitions, 989 flow. Second operand 9 states and 173 transitions. [2024-06-27 19:56:21,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 167 transitions, 1433 flow [2024-06-27 19:56:21,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 167 transitions, 1375 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 19:56:21,800 INFO L231 Difference]: Finished difference. Result has 122 places, 139 transitions, 1038 flow [2024-06-27 19:56:21,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=931, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1038, PETRI_PLACES=122, PETRI_TRANSITIONS=139} [2024-06-27 19:56:21,800 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 78 predicate places. [2024-06-27 19:56:21,800 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 139 transitions, 1038 flow [2024-06-27 19:56:21,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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 19:56:21,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:21,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:21,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 19:56:21,801 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 19:56:21,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:21,801 INFO L85 PathProgramCache]: Analyzing trace with hash 543383211, now seen corresponding path program 1 times [2024-06-27 19:56:21,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:21,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797844395] [2024-06-27 19:56:21,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:21,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:21,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:22,508 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 19:56:22,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:22,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797844395] [2024-06-27 19:56:22,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797844395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:22,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:22,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:56:22,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295029499] [2024-06-27 19:56:22,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:22,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:56:22,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:22,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:56:22,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:56:22,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:22,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 139 transitions, 1038 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:22,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:22,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:22,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:23,198 INFO L124 PetriNetUnfolderBase]: 2067/3177 cut-off events. [2024-06-27 19:56:23,198 INFO L125 PetriNetUnfolderBase]: For 139875/139878 co-relation queries the response was YES. [2024-06-27 19:56:23,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20898 conditions, 3177 events. 2067/3177 cut-off events. For 139875/139878 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16158 event pairs, 415 based on Foata normal form. 4/3177 useless extension candidates. Maximal degree in co-relation 20843. Up to 2733 conditions per place. [2024-06-27 19:56:23,219 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 129 selfloop transitions, 40 changer transitions 0/174 dead transitions. [2024-06-27 19:56:23,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 174 transitions, 1632 flow [2024-06-27 19:56:23,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:56:23,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:56:23,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 19:56:23,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 19:56:23,221 INFO L175 Difference]: Start difference. First operand has 122 places, 139 transitions, 1038 flow. Second operand 8 states and 160 transitions. [2024-06-27 19:56:23,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 174 transitions, 1632 flow [2024-06-27 19:56:23,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 174 transitions, 1565 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 19:56:23,298 INFO L231 Difference]: Finished difference. Result has 124 places, 143 transitions, 1118 flow [2024-06-27 19:56:23,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=971, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1118, PETRI_PLACES=124, PETRI_TRANSITIONS=143} [2024-06-27 19:56:23,299 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 80 predicate places. [2024-06-27 19:56:23,299 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 143 transitions, 1118 flow [2024-06-27 19:56:23,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:23,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:23,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:23,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 19:56:23,299 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 19:56:23,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:23,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1596017719, now seen corresponding path program 2 times [2024-06-27 19:56:23,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:23,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998754872] [2024-06-27 19:56:23,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:23,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:23,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:24,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:24,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:24,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998754872] [2024-06-27 19:56:24,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998754872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:24,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:24,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:56:24,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781919532] [2024-06-27 19:56:24,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:24,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:56:24,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:24,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:56:24,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:56:24,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:24,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 143 transitions, 1118 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:24,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:24,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:24,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:24,930 INFO L124 PetriNetUnfolderBase]: 2084/3204 cut-off events. [2024-06-27 19:56:24,930 INFO L125 PetriNetUnfolderBase]: For 148333/148336 co-relation queries the response was YES. [2024-06-27 19:56:24,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21418 conditions, 3204 events. 2084/3204 cut-off events. For 148333/148336 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 16354 event pairs, 584 based on Foata normal form. 4/3204 useless extension candidates. Maximal degree in co-relation 21362. Up to 2913 conditions per place. [2024-06-27 19:56:24,952 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 129 selfloop transitions, 38 changer transitions 0/172 dead transitions. [2024-06-27 19:56:24,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 172 transitions, 1552 flow [2024-06-27 19:56:24,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:56:24,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:56:24,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 19:56:24,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-27 19:56:24,953 INFO L175 Difference]: Start difference. First operand has 124 places, 143 transitions, 1118 flow. Second operand 8 states and 158 transitions. [2024-06-27 19:56:24,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 172 transitions, 1552 flow [2024-06-27 19:56:25,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 172 transitions, 1474 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-27 19:56:25,042 INFO L231 Difference]: Finished difference. Result has 128 places, 145 transitions, 1159 flow [2024-06-27 19:56:25,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1048, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1159, PETRI_PLACES=128, PETRI_TRANSITIONS=145} [2024-06-27 19:56:25,043 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 84 predicate places. [2024-06-27 19:56:25,043 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 145 transitions, 1159 flow [2024-06-27 19:56:25,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:25,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:25,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:25,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 19:56:25,044 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 19:56:25,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:25,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1596165589, now seen corresponding path program 3 times [2024-06-27 19:56:25,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:25,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720312607] [2024-06-27 19:56:25,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:25,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:25,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:25,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:25,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:25,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720312607] [2024-06-27 19:56:25,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720312607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:25,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:25,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:56:25,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772970411] [2024-06-27 19:56:25,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:25,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:56:25,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:25,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:56:25,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:56:25,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:25,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 145 transitions, 1159 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:25,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:25,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:25,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:26,637 INFO L124 PetriNetUnfolderBase]: 2101/3231 cut-off events. [2024-06-27 19:56:26,637 INFO L125 PetriNetUnfolderBase]: For 156706/156709 co-relation queries the response was YES. [2024-06-27 19:56:26,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21840 conditions, 3231 events. 2101/3231 cut-off events. For 156706/156709 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 16478 event pairs, 584 based on Foata normal form. 4/3231 useless extension candidates. Maximal degree in co-relation 21782. Up to 2899 conditions per place. [2024-06-27 19:56:26,657 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 129 selfloop transitions, 41 changer transitions 0/175 dead transitions. [2024-06-27 19:56:26,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 175 transitions, 1597 flow [2024-06-27 19:56:26,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:56:26,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:56:26,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 19:56:26,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2024-06-27 19:56:26,659 INFO L175 Difference]: Start difference. First operand has 128 places, 145 transitions, 1159 flow. Second operand 8 states and 159 transitions. [2024-06-27 19:56:26,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 175 transitions, 1597 flow [2024-06-27 19:56:26,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 175 transitions, 1508 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 19:56:26,746 INFO L231 Difference]: Finished difference. Result has 130 places, 147 transitions, 1191 flow [2024-06-27 19:56:26,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1070, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1191, PETRI_PLACES=130, PETRI_TRANSITIONS=147} [2024-06-27 19:56:26,747 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 86 predicate places. [2024-06-27 19:56:26,747 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 147 transitions, 1191 flow [2024-06-27 19:56:26,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:26,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:26,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:26,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 19:56:26,747 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:26,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:26,748 INFO L85 PathProgramCache]: Analyzing trace with hash 991521938, now seen corresponding path program 1 times [2024-06-27 19:56:26,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:26,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83857681] [2024-06-27 19:56:26,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:26,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:26,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:27,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:27,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:27,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83857681] [2024-06-27 19:56:27,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83857681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:27,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:27,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:56:27,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107867653] [2024-06-27 19:56:27,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:27,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:56:27,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:27,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:56:27,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:56:27,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:56:27,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 147 transitions, 1191 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 19:56:27,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:27,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:56:27,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:28,103 INFO L124 PetriNetUnfolderBase]: 2001/3137 cut-off events. [2024-06-27 19:56:28,104 INFO L125 PetriNetUnfolderBase]: For 164116/164119 co-relation queries the response was YES. [2024-06-27 19:56:28,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21636 conditions, 3137 events. 2001/3137 cut-off events. For 164116/164119 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16481 event pairs, 579 based on Foata normal form. 4/3137 useless extension candidates. Maximal degree in co-relation 21577. Up to 2824 conditions per place. [2024-06-27 19:56:28,122 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 132 selfloop transitions, 24 changer transitions 0/173 dead transitions. [2024-06-27 19:56:28,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 173 transitions, 1609 flow [2024-06-27 19:56:28,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:56:28,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:56:28,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-27 19:56:28,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47840531561461797 [2024-06-27 19:56:28,123 INFO L175 Difference]: Start difference. First operand has 130 places, 147 transitions, 1191 flow. Second operand 7 states and 144 transitions. [2024-06-27 19:56:28,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 173 transitions, 1609 flow [2024-06-27 19:56:28,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 173 transitions, 1510 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 19:56:28,192 INFO L231 Difference]: Finished difference. Result has 131 places, 151 transitions, 1205 flow [2024-06-27 19:56:28,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1092, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1205, PETRI_PLACES=131, PETRI_TRANSITIONS=151} [2024-06-27 19:56:28,192 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 87 predicate places. [2024-06-27 19:56:28,192 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 151 transitions, 1205 flow [2024-06-27 19:56:28,193 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 19:56:28,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:28,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:28,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 19:56:28,193 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 19:56:28,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:28,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1977860681, now seen corresponding path program 4 times [2024-06-27 19:56:28,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:28,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275718157] [2024-06-27 19:56:28,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:28,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:28,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:28,910 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 19:56:28,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:28,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275718157] [2024-06-27 19:56:28,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275718157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:28,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:28,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:56:28,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120507907] [2024-06-27 19:56:28,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:28,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:56:28,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:28,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:56:28,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:56:29,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:29,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 151 transitions, 1205 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:29,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:29,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:29,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:29,688 INFO L124 PetriNetUnfolderBase]: 2128/3274 cut-off events. [2024-06-27 19:56:29,689 INFO L125 PetriNetUnfolderBase]: For 173748/173751 co-relation queries the response was YES. [2024-06-27 19:56:29,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22822 conditions, 3274 events. 2128/3274 cut-off events. For 173748/173751 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 16709 event pairs, 419 based on Foata normal form. 4/3274 useless extension candidates. Maximal degree in co-relation 22762. Up to 2894 conditions per place. [2024-06-27 19:56:29,712 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 136 selfloop transitions, 45 changer transitions 0/186 dead transitions. [2024-06-27 19:56:29,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 186 transitions, 1819 flow [2024-06-27 19:56:29,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:56:29,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:56:29,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-27 19:56:29,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796511627906977 [2024-06-27 19:56:29,713 INFO L175 Difference]: Start difference. First operand has 131 places, 151 transitions, 1205 flow. Second operand 8 states and 165 transitions. [2024-06-27 19:56:29,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 186 transitions, 1819 flow [2024-06-27 19:56:29,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 186 transitions, 1734 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 19:56:29,910 INFO L231 Difference]: Finished difference. Result has 134 places, 153 transitions, 1249 flow [2024-06-27 19:56:29,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1120, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1249, PETRI_PLACES=134, PETRI_TRANSITIONS=153} [2024-06-27 19:56:29,911 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 90 predicate places. [2024-06-27 19:56:29,911 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 153 transitions, 1249 flow [2024-06-27 19:56:29,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:29,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:29,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:29,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 19:56:29,912 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:29,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:29,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1978008551, now seen corresponding path program 5 times [2024-06-27 19:56:29,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:29,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786448938] [2024-06-27 19:56:29,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:29,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:29,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:30,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:30,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:30,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786448938] [2024-06-27 19:56:30,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786448938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:30,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:30,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:56:30,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870734958] [2024-06-27 19:56:30,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:30,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:56:30,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:30,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:56:30,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:56:30,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:30,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 153 transitions, 1249 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:30,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:30,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:30,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:31,615 INFO L124 PetriNetUnfolderBase]: 2145/3301 cut-off events. [2024-06-27 19:56:31,615 INFO L125 PetriNetUnfolderBase]: For 183228/183231 co-relation queries the response was YES. [2024-06-27 19:56:31,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23288 conditions, 3301 events. 2145/3301 cut-off events. For 183228/183231 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 16878 event pairs, 588 based on Foata normal form. 4/3301 useless extension candidates. Maximal degree in co-relation 23227. Up to 3008 conditions per place. [2024-06-27 19:56:31,638 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 139 selfloop transitions, 41 changer transitions 0/185 dead transitions. [2024-06-27 19:56:31,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 185 transitions, 1721 flow [2024-06-27 19:56:31,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:56:31,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:56:31,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-27 19:56:31,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2024-06-27 19:56:31,639 INFO L175 Difference]: Start difference. First operand has 134 places, 153 transitions, 1249 flow. Second operand 8 states and 161 transitions. [2024-06-27 19:56:31,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 185 transitions, 1721 flow [2024-06-27 19:56:31,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 185 transitions, 1598 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 19:56:31,769 INFO L231 Difference]: Finished difference. Result has 136 places, 155 transitions, 1255 flow [2024-06-27 19:56:31,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1130, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1255, PETRI_PLACES=136, PETRI_TRANSITIONS=155} [2024-06-27 19:56:31,769 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 92 predicate places. [2024-06-27 19:56:31,770 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 155 transitions, 1255 flow [2024-06-27 19:56:31,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:31,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:31,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:31,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 19:56:31,770 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 19:56:31,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:31,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1983370931, now seen corresponding path program 6 times [2024-06-27 19:56:31,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:31,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496427922] [2024-06-27 19:56:31,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:31,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:31,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:32,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:32,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:32,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496427922] [2024-06-27 19:56:32,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496427922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:32,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:32,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:56:32,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092220477] [2024-06-27 19:56:32,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:32,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:56:32,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:32,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:56:32,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:56:32,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:32,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 155 transitions, 1255 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:32,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:32,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:32,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:33,235 INFO L124 PetriNetUnfolderBase]: 2162/3328 cut-off events. [2024-06-27 19:56:33,236 INFO L125 PetriNetUnfolderBase]: For 192352/192355 co-relation queries the response was YES. [2024-06-27 19:56:33,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23584 conditions, 3328 events. 2162/3328 cut-off events. For 192352/192355 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 17050 event pairs, 588 based on Foata normal form. 4/3328 useless extension candidates. Maximal degree in co-relation 23522. Up to 3035 conditions per place. [2024-06-27 19:56:33,260 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 141 selfloop transitions, 38 changer transitions 0/184 dead transitions. [2024-06-27 19:56:33,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 184 transitions, 1717 flow [2024-06-27 19:56:33,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:56:33,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:56:33,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-27 19:56:33,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-27 19:56:33,262 INFO L175 Difference]: Start difference. First operand has 136 places, 155 transitions, 1255 flow. Second operand 8 states and 157 transitions. [2024-06-27 19:56:33,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 184 transitions, 1717 flow [2024-06-27 19:56:33,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 184 transitions, 1614 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 19:56:33,424 INFO L231 Difference]: Finished difference. Result has 138 places, 157 transitions, 1275 flow [2024-06-27 19:56:33,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1152, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1275, PETRI_PLACES=138, PETRI_TRANSITIONS=157} [2024-06-27 19:56:33,424 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 94 predicate places. [2024-06-27 19:56:33,425 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 157 transitions, 1275 flow [2024-06-27 19:56:33,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:33,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:33,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:33,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 19:56:33,425 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:33,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:33,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1163486688, now seen corresponding path program 1 times [2024-06-27 19:56:33,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:33,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850933637] [2024-06-27 19:56:33,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:33,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:33,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:34,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:34,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:34,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850933637] [2024-06-27 19:56:34,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850933637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:34,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:34,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:56:34,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193857367] [2024-06-27 19:56:34,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:34,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:56:34,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:34,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:56:34,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:56:34,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:56:34,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 157 transitions, 1275 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 19:56:34,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:34,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:56:34,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:34,829 INFO L124 PetriNetUnfolderBase]: 2042/3209 cut-off events. [2024-06-27 19:56:34,830 INFO L125 PetriNetUnfolderBase]: For 199205/199205 co-relation queries the response was YES. [2024-06-27 19:56:34,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23161 conditions, 3209 events. 2042/3209 cut-off events. For 199205/199205 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 16906 event pairs, 574 based on Foata normal form. 1/3207 useless extension candidates. Maximal degree in co-relation 23098. Up to 2947 conditions per place. [2024-06-27 19:56:34,854 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 142 selfloop transitions, 14 changer transitions 0/176 dead transitions. [2024-06-27 19:56:34,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 176 transitions, 1663 flow [2024-06-27 19:56:34,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:56:34,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:56:34,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-27 19:56:34,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 19:56:34,855 INFO L175 Difference]: Start difference. First operand has 138 places, 157 transitions, 1275 flow. Second operand 7 states and 133 transitions. [2024-06-27 19:56:34,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 176 transitions, 1663 flow [2024-06-27 19:56:34,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 176 transitions, 1562 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 19:56:34,979 INFO L231 Difference]: Finished difference. Result has 139 places, 160 transitions, 1250 flow [2024-06-27 19:56:34,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1174, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1250, PETRI_PLACES=139, PETRI_TRANSITIONS=160} [2024-06-27 19:56:34,980 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 95 predicate places. [2024-06-27 19:56:34,980 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 160 transitions, 1250 flow [2024-06-27 19:56:34,980 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 19:56:34,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:34,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:34,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 19:56:34,980 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:34,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:34,981 INFO L85 PathProgramCache]: Analyzing trace with hash 991879988, now seen corresponding path program 2 times [2024-06-27 19:56:34,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:34,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021342198] [2024-06-27 19:56:34,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:34,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:34,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:35,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:35,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:35,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021342198] [2024-06-27 19:56:35,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021342198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:35,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:35,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:56:35,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948142156] [2024-06-27 19:56:35,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:35,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:56:35,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:35,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:56:35,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:56:35,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:56:35,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 160 transitions, 1250 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 19:56:35,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:35,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:56:35,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:36,193 INFO L124 PetriNetUnfolderBase]: 2070/3256 cut-off events. [2024-06-27 19:56:36,193 INFO L125 PetriNetUnfolderBase]: For 209988/209991 co-relation queries the response was YES. [2024-06-27 19:56:36,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23885 conditions, 3256 events. 2070/3256 cut-off events. For 209988/209991 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 17269 event pairs, 577 based on Foata normal form. 4/3256 useless extension candidates. Maximal degree in co-relation 23821. Up to 2895 conditions per place. [2024-06-27 19:56:36,262 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 136 selfloop transitions, 29 changer transitions 0/185 dead transitions. [2024-06-27 19:56:36,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 185 transitions, 1820 flow [2024-06-27 19:56:36,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:56:36,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:56:36,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-27 19:56:36,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 19:56:36,264 INFO L175 Difference]: Start difference. First operand has 139 places, 160 transitions, 1250 flow. Second operand 7 states and 140 transitions. [2024-06-27 19:56:36,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 185 transitions, 1820 flow [2024-06-27 19:56:36,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 185 transitions, 1766 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 19:56:36,409 INFO L231 Difference]: Finished difference. Result has 142 places, 168 transitions, 1400 flow [2024-06-27 19:56:36,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1196, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1400, PETRI_PLACES=142, PETRI_TRANSITIONS=168} [2024-06-27 19:56:36,410 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 98 predicate places. [2024-06-27 19:56:36,410 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 168 transitions, 1400 flow [2024-06-27 19:56:36,410 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 19:56:36,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:36,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:36,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 19:56:36,411 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 19:56:36,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:36,411 INFO L85 PathProgramCache]: Analyzing trace with hash 2121800823, now seen corresponding path program 7 times [2024-06-27 19:56:36,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:36,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895857358] [2024-06-27 19:56:36,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:36,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:36,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:37,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:37,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:37,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895857358] [2024-06-27 19:56:37,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895857358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:37,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:37,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:56:37,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867509360] [2024-06-27 19:56:37,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:37,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:56:37,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:37,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:56:37,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:56:37,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:37,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 168 transitions, 1400 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:37,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:37,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:37,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:37,847 INFO L124 PetriNetUnfolderBase]: 2187/3369 cut-off events. [2024-06-27 19:56:37,847 INFO L125 PetriNetUnfolderBase]: For 221036/221045 co-relation queries the response was YES. [2024-06-27 19:56:37,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25146 conditions, 3369 events. 2187/3369 cut-off events. For 221036/221045 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 17316 event pairs, 612 based on Foata normal form. 7/3367 useless extension candidates. Maximal degree in co-relation 25080. Up to 3069 conditions per place. [2024-06-27 19:56:37,873 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 151 selfloop transitions, 36 changer transitions 0/192 dead transitions. [2024-06-27 19:56:37,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 192 transitions, 1834 flow [2024-06-27 19:56:37,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:56:37,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:56:37,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 19:56:37,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-27 19:56:37,875 INFO L175 Difference]: Start difference. First operand has 142 places, 168 transitions, 1400 flow. Second operand 8 states and 153 transitions. [2024-06-27 19:56:37,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 192 transitions, 1834 flow [2024-06-27 19:56:38,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 192 transitions, 1731 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-27 19:56:38,044 INFO L231 Difference]: Finished difference. Result has 147 places, 168 transitions, 1376 flow [2024-06-27 19:56:38,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1297, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1376, PETRI_PLACES=147, PETRI_TRANSITIONS=168} [2024-06-27 19:56:38,045 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 103 predicate places. [2024-06-27 19:56:38,045 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 168 transitions, 1376 flow [2024-06-27 19:56:38,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:38,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:38,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:38,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 19:56:38,045 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:38,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:38,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1335815078, now seen corresponding path program 2 times [2024-06-27 19:56:38,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:38,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701033210] [2024-06-27 19:56:38,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:38,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:38,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:38,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:38,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:38,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701033210] [2024-06-27 19:56:38,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701033210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:38,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:38,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:56:38,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216627970] [2024-06-27 19:56:38,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:38,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:56:38,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:38,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:56:38,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:56:39,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:56:39,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 168 transitions, 1376 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 19:56:39,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:39,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:56:39,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:39,537 INFO L124 PetriNetUnfolderBase]: 2067/3252 cut-off events. [2024-06-27 19:56:39,537 INFO L125 PetriNetUnfolderBase]: For 227963/227972 co-relation queries the response was YES. [2024-06-27 19:56:39,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24798 conditions, 3252 events. 2067/3252 cut-off events. For 227963/227972 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 17211 event pairs, 580 based on Foata normal form. 7/3254 useless extension candidates. Maximal degree in co-relation 24730. Up to 2969 conditions per place. [2024-06-27 19:56:39,563 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 141 selfloop transitions, 26 changer transitions 0/187 dead transitions. [2024-06-27 19:56:39,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 187 transitions, 1924 flow [2024-06-27 19:56:39,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:56:39,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:56:39,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-27 19:56:39,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-27 19:56:39,565 INFO L175 Difference]: Start difference. First operand has 147 places, 168 transitions, 1376 flow. Second operand 7 states and 131 transitions. [2024-06-27 19:56:39,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 187 transitions, 1924 flow [2024-06-27 19:56:39,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 187 transitions, 1830 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 19:56:39,743 INFO L231 Difference]: Finished difference. Result has 148 places, 176 transitions, 1461 flow [2024-06-27 19:56:39,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1282, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1461, PETRI_PLACES=148, PETRI_TRANSITIONS=176} [2024-06-27 19:56:39,744 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 104 predicate places. [2024-06-27 19:56:39,744 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 176 transitions, 1461 flow [2024-06-27 19:56:39,744 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 19:56:39,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:39,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:39,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 19:56:39,745 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:39,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:39,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1405187302, now seen corresponding path program 3 times [2024-06-27 19:56:39,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:39,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160293285] [2024-06-27 19:56:39,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:39,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:39,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:40,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:40,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:40,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160293285] [2024-06-27 19:56:40,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160293285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:40,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:40,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:56:40,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493645016] [2024-06-27 19:56:40,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:40,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:56:40,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:40,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:56:40,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:56:40,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:56:40,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 176 transitions, 1461 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 19:56:40,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:40,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:56:40,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:41,109 INFO L124 PetriNetUnfolderBase]: 2064/3248 cut-off events. [2024-06-27 19:56:41,109 INFO L125 PetriNetUnfolderBase]: For 237676/237685 co-relation queries the response was YES. [2024-06-27 19:56:41,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25141 conditions, 3248 events. 2064/3248 cut-off events. For 237676/237685 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 17190 event pairs, 580 based on Foata normal form. 7/3250 useless extension candidates. Maximal degree in co-relation 25071. Up to 2975 conditions per place. [2024-06-27 19:56:41,136 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 148 selfloop transitions, 19 changer transitions 0/187 dead transitions. [2024-06-27 19:56:41,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 187 transitions, 1826 flow [2024-06-27 19:56:41,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:56:41,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:56:41,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-27 19:56:41,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 19:56:41,141 INFO L175 Difference]: Start difference. First operand has 148 places, 176 transitions, 1461 flow. Second operand 7 states and 129 transitions. [2024-06-27 19:56:41,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 187 transitions, 1826 flow [2024-06-27 19:56:41,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 187 transitions, 1736 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-27 19:56:41,319 INFO L231 Difference]: Finished difference. Result has 152 places, 177 transitions, 1424 flow [2024-06-27 19:56:41,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1371, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1424, PETRI_PLACES=152, PETRI_TRANSITIONS=177} [2024-06-27 19:56:41,320 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 108 predicate places. [2024-06-27 19:56:41,320 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 177 transitions, 1424 flow [2024-06-27 19:56:41,320 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 19:56:41,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:41,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:41,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 19:56:41,321 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 19:56:41,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:41,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1405186868, now seen corresponding path program 3 times [2024-06-27 19:56:41,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:41,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994346390] [2024-06-27 19:56:41,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:41,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:41,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:42,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:42,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:42,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994346390] [2024-06-27 19:56:42,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994346390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:42,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:42,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:56:42,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633497399] [2024-06-27 19:56:42,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:42,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:56:42,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:42,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:56:42,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:56:42,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:56:42,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 177 transitions, 1424 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 19:56:42,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:42,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:56:42,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:42,579 INFO L124 PetriNetUnfolderBase]: 2068/3254 cut-off events. [2024-06-27 19:56:42,580 INFO L125 PetriNetUnfolderBase]: For 246784/246793 co-relation queries the response was YES. [2024-06-27 19:56:42,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25337 conditions, 3254 events. 2068/3254 cut-off events. For 246784/246793 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 17221 event pairs, 604 based on Foata normal form. 5/3250 useless extension candidates. Maximal degree in co-relation 25265. Up to 2865 conditions per place. [2024-06-27 19:56:42,605 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 135 selfloop transitions, 42 changer transitions 0/197 dead transitions. [2024-06-27 19:56:42,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 197 transitions, 2124 flow [2024-06-27 19:56:42,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:56:42,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:56:42,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-27 19:56:42,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-27 19:56:42,607 INFO L175 Difference]: Start difference. First operand has 152 places, 177 transitions, 1424 flow. Second operand 7 states and 138 transitions. [2024-06-27 19:56:42,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 197 transitions, 2124 flow [2024-06-27 19:56:42,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 197 transitions, 2082 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 19:56:42,839 INFO L231 Difference]: Finished difference. Result has 155 places, 185 transitions, 1628 flow [2024-06-27 19:56:42,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1382, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1628, PETRI_PLACES=155, PETRI_TRANSITIONS=185} [2024-06-27 19:56:42,840 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 111 predicate places. [2024-06-27 19:56:42,840 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 185 transitions, 1628 flow [2024-06-27 19:56:42,840 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 19:56:42,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:42,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:42,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 19:56:42,841 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 19:56:42,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:42,841 INFO L85 PathProgramCache]: Analyzing trace with hash -957960164, now seen corresponding path program 1 times [2024-06-27 19:56:42,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:42,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777611015] [2024-06-27 19:56:42,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:42,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:42,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:43,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:43,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:43,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777611015] [2024-06-27 19:56:43,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777611015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:43,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:43,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:56:43,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019285782] [2024-06-27 19:56:43,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:43,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:56:43,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:43,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:56:43,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:56:43,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:56:43,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 185 transitions, 1628 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 19:56:43,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:43,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:56:43,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:44,164 INFO L124 PetriNetUnfolderBase]: 2059/3246 cut-off events. [2024-06-27 19:56:44,164 INFO L125 PetriNetUnfolderBase]: For 259882/259882 co-relation queries the response was YES. [2024-06-27 19:56:44,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26122 conditions, 3246 events. 2059/3246 cut-off events. For 259882/259882 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 17097 event pairs, 528 based on Foata normal form. 1/3244 useless extension candidates. Maximal degree in co-relation 26048. Up to 2993 conditions per place. [2024-06-27 19:56:44,188 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 180 selfloop transitions, 14 changer transitions 0/204 dead transitions. [2024-06-27 19:56:44,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 204 transitions, 2102 flow [2024-06-27 19:56:44,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:56:44,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:56:44,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-27 19:56:44,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 19:56:44,190 INFO L175 Difference]: Start difference. First operand has 155 places, 185 transitions, 1628 flow. Second operand 7 states and 133 transitions. [2024-06-27 19:56:44,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 204 transitions, 2102 flow [2024-06-27 19:56:44,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 204 transitions, 1954 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-27 19:56:44,446 INFO L231 Difference]: Finished difference. Result has 158 places, 188 transitions, 1566 flow [2024-06-27 19:56:44,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1482, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1566, PETRI_PLACES=158, PETRI_TRANSITIONS=188} [2024-06-27 19:56:44,447 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 114 predicate places. [2024-06-27 19:56:44,447 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 188 transitions, 1566 flow [2024-06-27 19:56:44,447 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 19:56:44,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:44,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:44,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 19:56:44,448 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 19:56:44,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:44,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1169196206, now seen corresponding path program 2 times [2024-06-27 19:56:44,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:44,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749562884] [2024-06-27 19:56:44,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:44,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:44,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:45,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:45,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:45,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749562884] [2024-06-27 19:56:45,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749562884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:45,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:45,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:56:45,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437244786] [2024-06-27 19:56:45,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:45,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:56:45,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:45,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:56:45,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:56:45,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:56:45,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 188 transitions, 1566 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 19:56:45,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:45,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:56:45,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:45,803 INFO L124 PetriNetUnfolderBase]: 2064/3253 cut-off events. [2024-06-27 19:56:45,803 INFO L125 PetriNetUnfolderBase]: For 268512/268512 co-relation queries the response was YES. [2024-06-27 19:56:45,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26186 conditions, 3253 events. 2064/3253 cut-off events. For 268512/268512 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 17113 event pairs, 528 based on Foata normal form. 1/3251 useless extension candidates. Maximal degree in co-relation 26111. Up to 2994 conditions per place. [2024-06-27 19:56:45,831 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 175 selfloop transitions, 19 changer transitions 0/204 dead transitions. [2024-06-27 19:56:45,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 204 transitions, 2036 flow [2024-06-27 19:56:45,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:56:45,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:56:45,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-27 19:56:45,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-27 19:56:45,837 INFO L175 Difference]: Start difference. First operand has 158 places, 188 transitions, 1566 flow. Second operand 7 states and 132 transitions. [2024-06-27 19:56:45,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 204 transitions, 2036 flow [2024-06-27 19:56:46,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 204 transitions, 1974 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 19:56:46,079 INFO L231 Difference]: Finished difference. Result has 160 places, 191 transitions, 1604 flow [2024-06-27 19:56:46,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1504, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1604, PETRI_PLACES=160, PETRI_TRANSITIONS=191} [2024-06-27 19:56:46,079 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 116 predicate places. [2024-06-27 19:56:46,080 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 191 transitions, 1604 flow [2024-06-27 19:56:46,080 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 19:56:46,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:46,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:46,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 19:56:46,080 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:46,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:46,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1169196454, now seen corresponding path program 1 times [2024-06-27 19:56:46,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:46,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707488509] [2024-06-27 19:56:46,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:46,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:46,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:46,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:46,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:46,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707488509] [2024-06-27 19:56:46,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707488509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:46,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:46,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:56:46,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346655394] [2024-06-27 19:56:46,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:46,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:56:46,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:46,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:56:46,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:56:47,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:56:47,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 191 transitions, 1604 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:47,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:47,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:56:47,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:47,565 INFO L124 PetriNetUnfolderBase]: 1969/3164 cut-off events. [2024-06-27 19:56:47,565 INFO L125 PetriNetUnfolderBase]: For 281772/281772 co-relation queries the response was YES. [2024-06-27 19:56:47,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26150 conditions, 3164 events. 1969/3164 cut-off events. For 281772/281772 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 17067 event pairs, 522 based on Foata normal form. 3/3164 useless extension candidates. Maximal degree in co-relation 26074. Up to 2778 conditions per place. [2024-06-27 19:56:47,595 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 167 selfloop transitions, 14 changer transitions 0/208 dead transitions. [2024-06-27 19:56:47,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 208 transitions, 2044 flow [2024-06-27 19:56:47,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:56:47,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:56:47,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-27 19:56:47,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45514950166112955 [2024-06-27 19:56:47,597 INFO L175 Difference]: Start difference. First operand has 160 places, 191 transitions, 1604 flow. Second operand 7 states and 137 transitions. [2024-06-27 19:56:47,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 208 transitions, 2044 flow [2024-06-27 19:56:47,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 208 transitions, 1966 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 19:56:47,862 INFO L231 Difference]: Finished difference. Result has 162 places, 194 transitions, 1610 flow [2024-06-27 19:56:47,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1526, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1610, PETRI_PLACES=162, PETRI_TRANSITIONS=194} [2024-06-27 19:56:47,863 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 118 predicate places. [2024-06-27 19:56:47,863 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 194 transitions, 1610 flow [2024-06-27 19:56:47,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:47,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:47,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:47,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 19:56:47,864 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:47,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:47,864 INFO L85 PathProgramCache]: Analyzing trace with hash -2036072766, now seen corresponding path program 2 times [2024-06-27 19:56:47,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:47,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825256300] [2024-06-27 19:56:47,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:47,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:47,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:48,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:48,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:48,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825256300] [2024-06-27 19:56:48,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825256300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:48,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:48,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:56:48,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962277854] [2024-06-27 19:56:48,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:48,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:56:48,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:48,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:56:48,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:56:48,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:56:48,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 194 transitions, 1610 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:48,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:48,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:56:48,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:49,339 INFO L124 PetriNetUnfolderBase]: 1979/3181 cut-off events. [2024-06-27 19:56:49,339 INFO L125 PetriNetUnfolderBase]: For 292014/292017 co-relation queries the response was YES. [2024-06-27 19:56:49,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26717 conditions, 3181 events. 1979/3181 cut-off events. For 292014/292017 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 17170 event pairs, 526 based on Foata normal form. 5/3182 useless extension candidates. Maximal degree in co-relation 26640. Up to 2786 conditions per place. [2024-06-27 19:56:49,367 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 162 selfloop transitions, 19 changer transitions 0/208 dead transitions. [2024-06-27 19:56:49,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 208 transitions, 2048 flow [2024-06-27 19:56:49,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:56:49,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:56:49,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-27 19:56:49,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-27 19:56:49,368 INFO L175 Difference]: Start difference. First operand has 162 places, 194 transitions, 1610 flow. Second operand 7 states and 136 transitions. [2024-06-27 19:56:49,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 208 transitions, 2048 flow [2024-06-27 19:56:49,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 208 transitions, 1986 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 19:56:49,636 INFO L231 Difference]: Finished difference. Result has 164 places, 197 transitions, 1648 flow [2024-06-27 19:56:49,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1548, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1648, PETRI_PLACES=164, PETRI_TRANSITIONS=197} [2024-06-27 19:56:49,636 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 120 predicate places. [2024-06-27 19:56:49,636 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 197 transitions, 1648 flow [2024-06-27 19:56:49,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:49,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:49,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:49,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 19:56:49,637 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:49,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:49,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1405371566, now seen corresponding path program 3 times [2024-06-27 19:56:49,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:49,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482953478] [2024-06-27 19:56:49,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:49,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:49,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:50,422 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 19:56:50,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:50,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482953478] [2024-06-27 19:56:50,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482953478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:50,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:50,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:56:50,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357406630] [2024-06-27 19:56:50,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:50,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:56:50,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:50,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:56:50,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:56:50,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:56:50,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 197 transitions, 1648 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 19:56:50,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:50,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:56:50,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:51,021 INFO L124 PetriNetUnfolderBase]: 2081/3282 cut-off events. [2024-06-27 19:56:51,022 INFO L125 PetriNetUnfolderBase]: For 298462/298465 co-relation queries the response was YES. [2024-06-27 19:56:51,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27669 conditions, 3282 events. 2081/3282 cut-off events. For 298462/298465 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 17308 event pairs, 535 based on Foata normal form. 1/3279 useless extension candidates. Maximal degree in co-relation 27591. Up to 3009 conditions per place. [2024-06-27 19:56:51,049 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 174 selfloop transitions, 26 changer transitions 0/210 dead transitions. [2024-06-27 19:56:51,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 210 transitions, 2132 flow [2024-06-27 19:56:51,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:56:51,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:56:51,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-27 19:56:51,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-27 19:56:51,050 INFO L175 Difference]: Start difference. First operand has 164 places, 197 transitions, 1648 flow. Second operand 7 states and 131 transitions. [2024-06-27 19:56:51,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 210 transitions, 2132 flow [2024-06-27 19:56:51,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 210 transitions, 2054 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 19:56:51,292 INFO L231 Difference]: Finished difference. Result has 166 places, 200 transitions, 1694 flow [2024-06-27 19:56:51,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1570, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1694, PETRI_PLACES=166, PETRI_TRANSITIONS=200} [2024-06-27 19:56:51,292 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 122 predicate places. [2024-06-27 19:56:51,293 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 200 transitions, 1694 flow [2024-06-27 19:56:51,293 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 19:56:51,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:51,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:51,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 19:56:51,293 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:51,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:51,294 INFO L85 PathProgramCache]: Analyzing trace with hash -2035776096, now seen corresponding path program 3 times [2024-06-27 19:56:51,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:51,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732362083] [2024-06-27 19:56:51,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:51,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:51,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:52,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:52,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:52,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732362083] [2024-06-27 19:56:52,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732362083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:52,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:52,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:56:52,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486657769] [2024-06-27 19:56:52,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:52,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:56:52,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:52,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:56:52,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:56:52,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:56:52,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 200 transitions, 1694 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:52,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:52,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:56:52,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:52,770 INFO L124 PetriNetUnfolderBase]: 1967/3165 cut-off events. [2024-06-27 19:56:52,770 INFO L125 PetriNetUnfolderBase]: For 307111/307114 co-relation queries the response was YES. [2024-06-27 19:56:52,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27183 conditions, 3165 events. 1967/3165 cut-off events. For 307111/307114 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 17193 event pairs, 524 based on Foata normal form. 5/3166 useless extension candidates. Maximal degree in co-relation 27104. Up to 2750 conditions per place. [2024-06-27 19:56:52,797 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 158 selfloop transitions, 29 changer transitions 0/215 dead transitions. [2024-06-27 19:56:52,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 215 transitions, 2154 flow [2024-06-27 19:56:52,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:56:52,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:56:52,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-27 19:56:52,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-27 19:56:52,799 INFO L175 Difference]: Start difference. First operand has 166 places, 200 transitions, 1694 flow. Second operand 7 states and 138 transitions. [2024-06-27 19:56:52,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 215 transitions, 2154 flow [2024-06-27 19:56:53,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 215 transitions, 2052 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-27 19:56:53,071 INFO L231 Difference]: Finished difference. Result has 168 places, 203 transitions, 1721 flow [2024-06-27 19:56:53,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1592, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1721, PETRI_PLACES=168, PETRI_TRANSITIONS=203} [2024-06-27 19:56:53,071 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 124 predicate places. [2024-06-27 19:56:53,071 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 203 transitions, 1721 flow [2024-06-27 19:56:53,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:53,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:53,072 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 19:56:53,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 19:56:53,072 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 19:56:53,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:53,072 INFO L85 PathProgramCache]: Analyzing trace with hash 951409454, now seen corresponding path program 1 times [2024-06-27 19:56:53,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:53,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161319302] [2024-06-27 19:56:53,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:53,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:53,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:53,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:53,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:53,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161319302] [2024-06-27 19:56:53,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161319302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:53,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:53,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:56:53,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552916755] [2024-06-27 19:56:53,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:53,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:56:53,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:53,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:56:53,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:56:53,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:53,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 203 transitions, 1721 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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 19:56:53,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:53,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:53,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:54,589 INFO L124 PetriNetUnfolderBase]: 2365/3669 cut-off events. [2024-06-27 19:56:54,590 INFO L125 PetriNetUnfolderBase]: For 352060/352063 co-relation queries the response was YES. [2024-06-27 19:56:54,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31058 conditions, 3669 events. 2365/3669 cut-off events. For 352060/352063 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 19289 event pairs, 385 based on Foata normal form. 16/3681 useless extension candidates. Maximal degree in co-relation 30978. Up to 2439 conditions per place. [2024-06-27 19:56:54,618 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 174 selfloop transitions, 71 changer transitions 0/250 dead transitions. [2024-06-27 19:56:54,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 250 transitions, 2585 flow [2024-06-27 19:56:54,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:56:54,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:56:54,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-27 19:56:54,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48578811369509045 [2024-06-27 19:56:54,619 INFO L175 Difference]: Start difference. First operand has 168 places, 203 transitions, 1721 flow. Second operand 9 states and 188 transitions. [2024-06-27 19:56:54,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 250 transitions, 2585 flow [2024-06-27 19:56:54,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 250 transitions, 2480 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-27 19:56:54,903 INFO L231 Difference]: Finished difference. Result has 172 places, 205 transitions, 1814 flow [2024-06-27 19:56:54,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1616, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1814, PETRI_PLACES=172, PETRI_TRANSITIONS=205} [2024-06-27 19:56:54,904 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 128 predicate places. [2024-06-27 19:56:54,904 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 205 transitions, 1814 flow [2024-06-27 19:56:54,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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 19:56:54,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:54,904 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 19:56:54,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 19:56:54,904 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 19:56:54,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:54,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1541570722, now seen corresponding path program 2 times [2024-06-27 19:56:54,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:54,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757895602] [2024-06-27 19:56:54,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:54,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:54,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:55,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:55,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:55,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757895602] [2024-06-27 19:56:55,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757895602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:55,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:55,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:56:55,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929918635] [2024-06-27 19:56:55,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:55,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:56:55,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:55,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:56:55,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:56:55,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:55,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 205 transitions, 1814 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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 19:56:55,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:55,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:55,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:56,719 INFO L124 PetriNetUnfolderBase]: 2457/3831 cut-off events. [2024-06-27 19:56:56,720 INFO L125 PetriNetUnfolderBase]: For 371650/371653 co-relation queries the response was YES. [2024-06-27 19:56:56,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32315 conditions, 3831 events. 2457/3831 cut-off events. For 371650/371653 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 20583 event pairs, 604 based on Foata normal form. 24/3851 useless extension candidates. Maximal degree in co-relation 32234. Up to 3144 conditions per place. [2024-06-27 19:56:56,812 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 174 selfloop transitions, 65 changer transitions 0/244 dead transitions. [2024-06-27 19:56:56,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 244 transitions, 2450 flow [2024-06-27 19:56:56,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:56:56,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:56:56,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-27 19:56:56,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4780361757105943 [2024-06-27 19:56:56,814 INFO L175 Difference]: Start difference. First operand has 172 places, 205 transitions, 1814 flow. Second operand 9 states and 185 transitions. [2024-06-27 19:56:56,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 244 transitions, 2450 flow [2024-06-27 19:56:57,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 244 transitions, 2364 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 19:56:57,177 INFO L231 Difference]: Finished difference. Result has 176 places, 207 transitions, 1918 flow [2024-06-27 19:56:57,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1728, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1918, PETRI_PLACES=176, PETRI_TRANSITIONS=207} [2024-06-27 19:56:57,177 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 132 predicate places. [2024-06-27 19:56:57,177 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 207 transitions, 1918 flow [2024-06-27 19:56:57,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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 19:56:57,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:57,178 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 19:56:57,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 19:56:57,178 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 19:56:57,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:57,179 INFO L85 PathProgramCache]: Analyzing trace with hash -628855612, now seen corresponding path program 3 times [2024-06-27 19:56:57,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:57,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821442977] [2024-06-27 19:56:57,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:57,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:57,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:57,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:57,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:57,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821442977] [2024-06-27 19:56:57,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821442977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:57,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:57,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:56:57,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657332445] [2024-06-27 19:56:57,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:57,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:56:57,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:57,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:56:57,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:56:58,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:58,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 207 transitions, 1918 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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 19:56:58,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:58,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:58,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:58,803 INFO L124 PetriNetUnfolderBase]: 2515/3939 cut-off events. [2024-06-27 19:56:58,804 INFO L125 PetriNetUnfolderBase]: For 380050/380053 co-relation queries the response was YES. [2024-06-27 19:56:58,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33400 conditions, 3939 events. 2515/3939 cut-off events. For 380050/380053 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 21413 event pairs, 604 based on Foata normal form. 16/3951 useless extension candidates. Maximal degree in co-relation 33317. Up to 3132 conditions per place. [2024-06-27 19:56:58,840 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 177 selfloop transitions, 67 changer transitions 0/249 dead transitions. [2024-06-27 19:56:58,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 249 transitions, 2558 flow [2024-06-27 19:56:58,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:56:58,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:56:58,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-27 19:56:58,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48578811369509045 [2024-06-27 19:56:58,841 INFO L175 Difference]: Start difference. First operand has 176 places, 207 transitions, 1918 flow. Second operand 9 states and 188 transitions. [2024-06-27 19:56:58,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 249 transitions, 2558 flow [2024-06-27 19:56:59,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 249 transitions, 2398 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-27 19:56:59,152 INFO L231 Difference]: Finished difference. Result has 178 places, 208 transitions, 1928 flow [2024-06-27 19:56:59,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1758, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1928, PETRI_PLACES=178, PETRI_TRANSITIONS=208} [2024-06-27 19:56:59,152 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 134 predicate places. [2024-06-27 19:56:59,152 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 208 transitions, 1928 flow [2024-06-27 19:56:59,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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 19:56:59,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:59,153 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 19:56:59,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 19:56:59,153 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 19:56:59,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:59,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1688990848, now seen corresponding path program 4 times [2024-06-27 19:56:59,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:59,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585705041] [2024-06-27 19:56:59,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:59,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:59,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:59,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:59,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:59,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585705041] [2024-06-27 19:56:59,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585705041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:59,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:59,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:56:59,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181544332] [2024-06-27 19:56:59,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:59,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:56:59,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:59,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:56:59,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:56:59,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:59,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 208 transitions, 1928 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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 19:56:59,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:59,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:59,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:00,868 INFO L124 PetriNetUnfolderBase]: 2573/4047 cut-off events. [2024-06-27 19:57:00,868 INFO L125 PetriNetUnfolderBase]: For 394125/394128 co-relation queries the response was YES. [2024-06-27 19:57:00,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33941 conditions, 4047 events. 2573/4047 cut-off events. For 394125/394128 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 22263 event pairs, 619 based on Foata normal form. 16/4059 useless extension candidates. Maximal degree in co-relation 33857. Up to 3097 conditions per place. [2024-06-27 19:57:00,905 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 176 selfloop transitions, 70 changer transitions 0/251 dead transitions. [2024-06-27 19:57:00,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 251 transitions, 2576 flow [2024-06-27 19:57:00,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:57:00,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:57:00,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-27 19:57:00,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-27 19:57:00,907 INFO L175 Difference]: Start difference. First operand has 178 places, 208 transitions, 1928 flow. Second operand 9 states and 189 transitions. [2024-06-27 19:57:00,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 251 transitions, 2576 flow [2024-06-27 19:57:01,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 251 transitions, 2424 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 19:57:01,202 INFO L231 Difference]: Finished difference. Result has 180 places, 209 transitions, 1954 flow [2024-06-27 19:57:01,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1776, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1954, PETRI_PLACES=180, PETRI_TRANSITIONS=209} [2024-06-27 19:57:01,202 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 136 predicate places. [2024-06-27 19:57:01,202 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 209 transitions, 1954 flow [2024-06-27 19:57:01,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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 19:57:01,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:01,203 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 19:57:01,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 19:57:01,203 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:01,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:01,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1517809156, now seen corresponding path program 1 times [2024-06-27 19:57:01,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:01,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284386988] [2024-06-27 19:57:01,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:01,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:01,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:02,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:02,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:02,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284386988] [2024-06-27 19:57:02,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284386988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:02,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:02,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:57:02,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569729732] [2024-06-27 19:57:02,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:02,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:57:02,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:02,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:57:02,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:57:02,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:57:02,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 209 transitions, 1954 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 19:57:02,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:02,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:57:02,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:02,922 INFO L124 PetriNetUnfolderBase]: 2434/3904 cut-off events. [2024-06-27 19:57:02,922 INFO L125 PetriNetUnfolderBase]: For 390475/390478 co-relation queries the response was YES. [2024-06-27 19:57:02,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33389 conditions, 3904 events. 2434/3904 cut-off events. For 390475/390478 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 22122 event pairs, 666 based on Foata normal form. 4/3892 useless extension candidates. Maximal degree in co-relation 33304. Up to 3516 conditions per place. [2024-06-27 19:57:02,962 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 185 selfloop transitions, 28 changer transitions 0/236 dead transitions. [2024-06-27 19:57:02,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 236 transitions, 2506 flow [2024-06-27 19:57:02,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:57:02,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:57:02,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 19:57:02,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 19:57:02,963 INFO L175 Difference]: Start difference. First operand has 180 places, 209 transitions, 1954 flow. Second operand 8 states and 160 transitions. [2024-06-27 19:57:02,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 236 transitions, 2506 flow [2024-06-27 19:57:03,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 236 transitions, 2346 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 19:57:03,407 INFO L231 Difference]: Finished difference. Result has 181 places, 213 transitions, 1933 flow [2024-06-27 19:57:03,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1794, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1933, PETRI_PLACES=181, PETRI_TRANSITIONS=213} [2024-06-27 19:57:03,407 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 137 predicate places. [2024-06-27 19:57:03,408 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 213 transitions, 1933 flow [2024-06-27 19:57:03,408 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 19:57:03,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:03,408 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 19:57:03,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 19:57:03,408 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:03,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:03,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1589045216, now seen corresponding path program 5 times [2024-06-27 19:57:03,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:03,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928520942] [2024-06-27 19:57:03,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:03,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:03,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:04,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:04,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:04,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928520942] [2024-06-27 19:57:04,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928520942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:04,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:04,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:57:04,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285513101] [2024-06-27 19:57:04,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:04,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:57:04,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:04,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:57:04,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:57:04,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:57:04,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 213 transitions, 1933 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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 19:57:04,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:04,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:57:04,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:05,134 INFO L124 PetriNetUnfolderBase]: 2702/4284 cut-off events. [2024-06-27 19:57:05,134 INFO L125 PetriNetUnfolderBase]: For 435246/435249 co-relation queries the response was YES. [2024-06-27 19:57:05,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36051 conditions, 4284 events. 2702/4284 cut-off events. For 435246/435249 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 24172 event pairs, 510 based on Foata normal form. 16/4296 useless extension candidates. Maximal degree in co-relation 35965. Up to 3205 conditions per place. [2024-06-27 19:57:05,176 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 180 selfloop transitions, 77 changer transitions 0/262 dead transitions. [2024-06-27 19:57:05,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 262 transitions, 2845 flow [2024-06-27 19:57:05,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:57:05,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:57:05,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-27 19:57:05,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5012919896640827 [2024-06-27 19:57:05,178 INFO L175 Difference]: Start difference. First operand has 181 places, 213 transitions, 1933 flow. Second operand 9 states and 194 transitions. [2024-06-27 19:57:05,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 262 transitions, 2845 flow [2024-06-27 19:57:05,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 262 transitions, 2734 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 19:57:05,556 INFO L231 Difference]: Finished difference. Result has 184 places, 215 transitions, 2048 flow [2024-06-27 19:57:05,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1822, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2048, PETRI_PLACES=184, PETRI_TRANSITIONS=215} [2024-06-27 19:57:05,557 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 140 predicate places. [2024-06-27 19:57:05,557 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 215 transitions, 2048 flow [2024-06-27 19:57:05,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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 19:57:05,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:05,557 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 19:57:05,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 19:57:05,558 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 19:57:05,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:05,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1184255172, now seen corresponding path program 6 times [2024-06-27 19:57:05,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:05,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948915109] [2024-06-27 19:57:05,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:05,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:05,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:06,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:06,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:06,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948915109] [2024-06-27 19:57:06,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948915109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:06,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:06,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:57:06,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592014252] [2024-06-27 19:57:06,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:06,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:57:06,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:06,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:57:06,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:57:06,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:57:06,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 215 transitions, 2048 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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 19:57:06,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:06,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:57:06,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:07,553 INFO L124 PetriNetUnfolderBase]: 2871/4563 cut-off events. [2024-06-27 19:57:07,554 INFO L125 PetriNetUnfolderBase]: For 481194/481197 co-relation queries the response was YES. [2024-06-27 19:57:07,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39085 conditions, 4563 events. 2871/4563 cut-off events. For 481194/481197 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 26187 event pairs, 705 based on Foata normal form. 16/4575 useless extension candidates. Maximal degree in co-relation 38998. Up to 3696 conditions per place. [2024-06-27 19:57:07,600 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 187 selfloop transitions, 72 changer transitions 0/264 dead transitions. [2024-06-27 19:57:07,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 264 transitions, 2974 flow [2024-06-27 19:57:07,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:57:07,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:57:07,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-27 19:57:07,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5012919896640827 [2024-06-27 19:57:07,602 INFO L175 Difference]: Start difference. First operand has 184 places, 215 transitions, 2048 flow. Second operand 9 states and 194 transitions. [2024-06-27 19:57:07,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 264 transitions, 2974 flow [2024-06-27 19:57:08,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 264 transitions, 2863 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 19:57:08,054 INFO L231 Difference]: Finished difference. Result has 188 places, 217 transitions, 2157 flow [2024-06-27 19:57:08,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1937, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2157, PETRI_PLACES=188, PETRI_TRANSITIONS=217} [2024-06-27 19:57:08,055 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 144 predicate places. [2024-06-27 19:57:08,055 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 217 transitions, 2157 flow [2024-06-27 19:57:08,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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 19:57:08,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:08,055 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 19:57:08,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 19:57:08,056 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 19:57:08,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:08,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1355135232, now seen corresponding path program 7 times [2024-06-27 19:57:08,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:08,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779894318] [2024-06-27 19:57:08,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:08,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:08,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:08,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:08,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:08,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779894318] [2024-06-27 19:57:08,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779894318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:08,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:08,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:57:08,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250039083] [2024-06-27 19:57:08,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:08,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:57:08,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:08,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:57:08,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:57:08,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:57:08,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 217 transitions, 2157 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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 19:57:08,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:08,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:57:08,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:10,028 INFO L124 PetriNetUnfolderBase]: 2946/4698 cut-off events. [2024-06-27 19:57:10,029 INFO L125 PetriNetUnfolderBase]: For 504342/504345 co-relation queries the response was YES. [2024-06-27 19:57:10,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40226 conditions, 4698 events. 2946/4698 cut-off events. For 504342/504345 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 27325 event pairs, 754 based on Foata normal form. 20/4714 useless extension candidates. Maximal degree in co-relation 40137. Up to 3977 conditions per place. [2024-06-27 19:57:10,074 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 187 selfloop transitions, 65 changer transitions 0/257 dead transitions. [2024-06-27 19:57:10,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 257 transitions, 2817 flow [2024-06-27 19:57:10,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:57:10,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:57:10,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-27 19:57:10,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4806201550387597 [2024-06-27 19:57:10,076 INFO L175 Difference]: Start difference. First operand has 188 places, 217 transitions, 2157 flow. Second operand 9 states and 186 transitions. [2024-06-27 19:57:10,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 257 transitions, 2817 flow [2024-06-27 19:57:10,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 257 transitions, 2705 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 19:57:10,608 INFO L231 Difference]: Finished difference. Result has 192 places, 218 transitions, 2220 flow [2024-06-27 19:57:10,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2045, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2220, PETRI_PLACES=192, PETRI_TRANSITIONS=218} [2024-06-27 19:57:10,608 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 148 predicate places. [2024-06-27 19:57:10,608 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 218 transitions, 2220 flow [2024-06-27 19:57:10,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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 19:57:10,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:10,609 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 19:57:10,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 19:57:10,609 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 19:57:10,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:10,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1188901452, now seen corresponding path program 8 times [2024-06-27 19:57:10,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:10,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001701122] [2024-06-27 19:57:10,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:10,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:10,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:11,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:11,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:11,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001701122] [2024-06-27 19:57:11,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001701122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:11,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:11,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:57:11,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903917275] [2024-06-27 19:57:11,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:11,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:57:11,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:11,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:57:11,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:57:11,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:57:11,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 218 transitions, 2220 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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 19:57:11,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:11,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:57:11,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:12,543 INFO L124 PetriNetUnfolderBase]: 2910/4642 cut-off events. [2024-06-27 19:57:12,543 INFO L125 PetriNetUnfolderBase]: For 491130/491133 co-relation queries the response was YES. [2024-06-27 19:57:12,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39230 conditions, 4642 events. 2910/4642 cut-off events. For 491130/491133 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 26918 event pairs, 731 based on Foata normal form. 20/4658 useless extension candidates. Maximal degree in co-relation 39139. Up to 3921 conditions per place. [2024-06-27 19:57:12,587 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 184 selfloop transitions, 70 changer transitions 0/259 dead transitions. [2024-06-27 19:57:12,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 259 transitions, 2852 flow [2024-06-27 19:57:12,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:57:12,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:57:12,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-27 19:57:12,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48578811369509045 [2024-06-27 19:57:12,589 INFO L175 Difference]: Start difference. First operand has 192 places, 218 transitions, 2220 flow. Second operand 9 states and 188 transitions. [2024-06-27 19:57:12,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 259 transitions, 2852 flow [2024-06-27 19:57:13,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 259 transitions, 2687 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-27 19:57:13,159 INFO L231 Difference]: Finished difference. Result has 194 places, 218 transitions, 2202 flow [2024-06-27 19:57:13,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2055, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2202, PETRI_PLACES=194, PETRI_TRANSITIONS=218} [2024-06-27 19:57:13,159 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 150 predicate places. [2024-06-27 19:57:13,159 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 218 transitions, 2202 flow [2024-06-27 19:57:13,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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 19:57:13,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:13,160 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 19:57:13,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 19:57:13,160 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 19:57:13,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:13,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1354957602, now seen corresponding path program 9 times [2024-06-27 19:57:13,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:13,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172735383] [2024-06-27 19:57:13,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:13,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:13,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:13,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:13,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:13,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172735383] [2024-06-27 19:57:13,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172735383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:13,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:13,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:57:13,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521081198] [2024-06-27 19:57:13,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:13,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:57:13,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:13,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:57:13,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:57:13,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:57:13,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 218 transitions, 2202 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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 19:57:13,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:13,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:57:13,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:15,019 INFO L124 PetriNetUnfolderBase]: 3079/4921 cut-off events. [2024-06-27 19:57:15,023 INFO L125 PetriNetUnfolderBase]: For 531396/531399 co-relation queries the response was YES. [2024-06-27 19:57:15,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41799 conditions, 4921 events. 3079/4921 cut-off events. For 531396/531399 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 29016 event pairs, 750 based on Foata normal form. 16/4933 useless extension candidates. Maximal degree in co-relation 41707. Up to 3924 conditions per place. [2024-06-27 19:57:15,075 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 191 selfloop transitions, 68 changer transitions 0/264 dead transitions. [2024-06-27 19:57:15,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 264 transitions, 3140 flow [2024-06-27 19:57:15,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:57:15,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:57:15,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-27 19:57:15,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4909560723514212 [2024-06-27 19:57:15,076 INFO L175 Difference]: Start difference. First operand has 194 places, 218 transitions, 2202 flow. Second operand 9 states and 190 transitions. [2024-06-27 19:57:15,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 264 transitions, 3140 flow [2024-06-27 19:57:15,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 264 transitions, 2995 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-27 19:57:15,674 INFO L231 Difference]: Finished difference. Result has 195 places, 220 transitions, 2277 flow [2024-06-27 19:57:15,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2057, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2277, PETRI_PLACES=195, PETRI_TRANSITIONS=220} [2024-06-27 19:57:15,675 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 151 predicate places. [2024-06-27 19:57:15,675 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 220 transitions, 2277 flow [2024-06-27 19:57:15,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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 19:57:15,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:15,675 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 19:57:15,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 19:57:15,676 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 19:57:15,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:15,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1361391342, now seen corresponding path program 10 times [2024-06-27 19:57:15,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:15,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050042489] [2024-06-27 19:57:15,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:15,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:15,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:16,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:16,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:16,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050042489] [2024-06-27 19:57:16,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050042489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:16,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:16,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:57:16,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565097955] [2024-06-27 19:57:16,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:16,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:57:16,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:16,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:57:16,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:57:16,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:57:16,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 220 transitions, 2277 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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 19:57:16,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:16,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:57:16,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:17,435 INFO L124 PetriNetUnfolderBase]: 3043/4865 cut-off events. [2024-06-27 19:57:17,435 INFO L125 PetriNetUnfolderBase]: For 524784/524787 co-relation queries the response was YES. [2024-06-27 19:57:17,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40707 conditions, 4865 events. 3043/4865 cut-off events. For 524784/524787 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 28656 event pairs, 752 based on Foata normal form. 20/4881 useless extension candidates. Maximal degree in co-relation 40614. Up to 4144 conditions per place. [2024-06-27 19:57:17,484 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 187 selfloop transitions, 66 changer transitions 0/258 dead transitions. [2024-06-27 19:57:17,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 258 transitions, 2899 flow [2024-06-27 19:57:17,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:57:17,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:57:17,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-27 19:57:17,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4754521963824289 [2024-06-27 19:57:17,485 INFO L175 Difference]: Start difference. First operand has 195 places, 220 transitions, 2277 flow. Second operand 9 states and 184 transitions. [2024-06-27 19:57:17,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 258 transitions, 2899 flow [2024-06-27 19:57:18,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 258 transitions, 2775 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-27 19:57:18,158 INFO L231 Difference]: Finished difference. Result has 199 places, 220 transitions, 2292 flow [2024-06-27 19:57:18,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2153, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2292, PETRI_PLACES=199, PETRI_TRANSITIONS=220} [2024-06-27 19:57:18,159 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 155 predicate places. [2024-06-27 19:57:18,159 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 220 transitions, 2292 flow [2024-06-27 19:57:18,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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 19:57:18,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:18,159 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 19:57:18,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 19:57:18,159 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:18,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:18,160 INFO L85 PathProgramCache]: Analyzing trace with hash 683246193, now seen corresponding path program 1 times [2024-06-27 19:57:18,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:18,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396331868] [2024-06-27 19:57:18,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:18,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:18,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:18,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:18,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:18,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396331868] [2024-06-27 19:57:18,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396331868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:18,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:18,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:57:18,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208338526] [2024-06-27 19:57:18,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:18,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:57:18,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:18,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:57:18,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:57:18,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:57:18,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 220 transitions, 2292 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 19:57:18,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:18,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:57:18,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:19,728 INFO L124 PetriNetUnfolderBase]: 2888/4684 cut-off events. [2024-06-27 19:57:19,728 INFO L125 PetriNetUnfolderBase]: For 508838/508841 co-relation queries the response was YES. [2024-06-27 19:57:19,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40043 conditions, 4684 events. 2888/4684 cut-off events. For 508838/508841 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 28147 event pairs, 789 based on Foata normal form. 4/4648 useless extension candidates. Maximal degree in co-relation 39948. Up to 4282 conditions per place. [2024-06-27 19:57:19,776 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 197 selfloop transitions, 23 changer transitions 0/243 dead transitions. [2024-06-27 19:57:19,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 243 transitions, 2835 flow [2024-06-27 19:57:19,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:57:19,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:57:19,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-27 19:57:19,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4684385382059801 [2024-06-27 19:57:19,778 INFO L175 Difference]: Start difference. First operand has 199 places, 220 transitions, 2292 flow. Second operand 7 states and 141 transitions. [2024-06-27 19:57:19,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 243 transitions, 2835 flow [2024-06-27 19:57:20,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 243 transitions, 2693 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 19:57:20,322 INFO L231 Difference]: Finished difference. Result has 198 places, 224 transitions, 2266 flow [2024-06-27 19:57:20,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2150, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2266, PETRI_PLACES=198, PETRI_TRANSITIONS=224} [2024-06-27 19:57:20,322 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 154 predicate places. [2024-06-27 19:57:20,322 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 224 transitions, 2266 flow [2024-06-27 19:57:20,323 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 19:57:20,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:20,323 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 19:57:20,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 19:57:20,323 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 19:57:20,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:20,324 INFO L85 PathProgramCache]: Analyzing trace with hash 683513103, now seen corresponding path program 2 times [2024-06-27 19:57:20,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:20,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010861730] [2024-06-27 19:57:20,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:20,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:20,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:21,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:21,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:21,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010861730] [2024-06-27 19:57:21,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010861730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:21,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:21,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:57:21,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718448109] [2024-06-27 19:57:21,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:21,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:57:21,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:21,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:57:21,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:57:21,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:57:21,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 224 transitions, 2266 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 19:57:21,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:21,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:57:21,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:22,003 INFO L124 PetriNetUnfolderBase]: 2890/4687 cut-off events. [2024-06-27 19:57:22,003 INFO L125 PetriNetUnfolderBase]: For 520179/520182 co-relation queries the response was YES. [2024-06-27 19:57:22,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39949 conditions, 4687 events. 2890/4687 cut-off events. For 520179/520182 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 28190 event pairs, 789 based on Foata normal form. 4/4651 useless extension candidates. Maximal degree in co-relation 39853. Up to 4253 conditions per place. [2024-06-27 19:57:22,044 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 186 selfloop transitions, 35 changer transitions 0/244 dead transitions. [2024-06-27 19:57:22,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 244 transitions, 2934 flow [2024-06-27 19:57:22,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:57:22,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:57:22,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-27 19:57:22,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 19:57:22,045 INFO L175 Difference]: Start difference. First operand has 198 places, 224 transitions, 2266 flow. Second operand 7 states and 140 transitions. [2024-06-27 19:57:22,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 244 transitions, 2934 flow [2024-06-27 19:57:22,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 244 transitions, 2859 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 19:57:22,616 INFO L231 Difference]: Finished difference. Result has 200 places, 227 transitions, 2326 flow [2024-06-27 19:57:22,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2191, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2326, PETRI_PLACES=200, PETRI_TRANSITIONS=227} [2024-06-27 19:57:22,617 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 156 predicate places. [2024-06-27 19:57:22,617 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 227 transitions, 2326 flow [2024-06-27 19:57:22,617 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 19:57:22,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:22,617 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 19:57:22,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 19:57:22,617 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 19:57:22,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:22,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1528921726, now seen corresponding path program 2 times [2024-06-27 19:57:22,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:22,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828210781] [2024-06-27 19:57:22,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:22,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:22,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:23,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:23,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:23,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828210781] [2024-06-27 19:57:23,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828210781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:23,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:23,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:57:23,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664102516] [2024-06-27 19:57:23,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:23,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:57:23,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:23,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:57:23,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:57:23,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:57:23,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 227 transitions, 2326 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 19:57:23,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:23,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:57:23,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:24,675 INFO L124 PetriNetUnfolderBase]: 2926/4742 cut-off events. [2024-06-27 19:57:24,676 INFO L125 PetriNetUnfolderBase]: For 542296/542299 co-relation queries the response was YES. [2024-06-27 19:57:24,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40785 conditions, 4742 events. 2926/4742 cut-off events. For 542296/542299 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 28572 event pairs, 788 based on Foata normal form. 4/4706 useless extension candidates. Maximal degree in co-relation 40688. Up to 4256 conditions per place. [2024-06-27 19:57:24,725 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 188 selfloop transitions, 44 changer transitions 0/255 dead transitions. [2024-06-27 19:57:24,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 255 transitions, 3276 flow [2024-06-27 19:57:24,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:57:24,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:57:24,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 19:57:24,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-27 19:57:24,726 INFO L175 Difference]: Start difference. First operand has 200 places, 227 transitions, 2326 flow. Second operand 8 states and 158 transitions. [2024-06-27 19:57:24,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 255 transitions, 3276 flow [2024-06-27 19:57:25,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 255 transitions, 3191 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-27 19:57:25,268 INFO L231 Difference]: Finished difference. Result has 205 places, 235 transitions, 2509 flow [2024-06-27 19:57:25,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2241, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2509, PETRI_PLACES=205, PETRI_TRANSITIONS=235} [2024-06-27 19:57:25,268 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 161 predicate places. [2024-06-27 19:57:25,269 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 235 transitions, 2509 flow [2024-06-27 19:57:25,269 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 19:57:25,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:25,269 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 19:57:25,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 19:57:25,269 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:25,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:25,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1528922191, now seen corresponding path program 1 times [2024-06-27 19:57:25,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:25,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005119090] [2024-06-27 19:57:25,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:25,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:25,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:26,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:26,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:26,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005119090] [2024-06-27 19:57:26,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005119090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:26,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:26,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:57:26,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474897429] [2024-06-27 19:57:26,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:26,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:57:26,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:26,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:57:26,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:57:26,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:57:26,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 235 transitions, 2509 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 19:57:26,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:26,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:57:26,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:27,079 INFO L124 PetriNetUnfolderBase]: 2936/4755 cut-off events. [2024-06-27 19:57:27,080 INFO L125 PetriNetUnfolderBase]: For 562164/562164 co-relation queries the response was YES. [2024-06-27 19:57:27,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41803 conditions, 4755 events. 2936/4755 cut-off events. For 562164/562164 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 28593 event pairs, 785 based on Foata normal form. 2/4718 useless extension candidates. Maximal degree in co-relation 41704. Up to 4408 conditions per place. [2024-06-27 19:57:27,129 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 216 selfloop transitions, 17 changer transitions 0/256 dead transitions. [2024-06-27 19:57:27,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 256 transitions, 3087 flow [2024-06-27 19:57:27,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:57:27,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:57:27,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 19:57:27,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-27 19:57:27,133 INFO L175 Difference]: Start difference. First operand has 205 places, 235 transitions, 2509 flow. Second operand 8 states and 149 transitions. [2024-06-27 19:57:27,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 256 transitions, 3087 flow [2024-06-27 19:57:27,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 256 transitions, 2961 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-27 19:57:27,748 INFO L231 Difference]: Finished difference. Result has 209 places, 238 transitions, 2497 flow [2024-06-27 19:57:27,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2383, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2497, PETRI_PLACES=209, PETRI_TRANSITIONS=238} [2024-06-27 19:57:27,749 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 165 predicate places. [2024-06-27 19:57:27,749 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 238 transitions, 2497 flow [2024-06-27 19:57:27,749 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 19:57:27,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:27,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:27,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 19:57:27,749 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:27,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:27,750 INFO L85 PathProgramCache]: Analyzing trace with hash 683509538, now seen corresponding path program 3 times [2024-06-27 19:57:27,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:27,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137822712] [2024-06-27 19:57:27,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:27,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:27,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:28,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:28,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:28,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137822712] [2024-06-27 19:57:28,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137822712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:28,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:28,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:57:28,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552980735] [2024-06-27 19:57:28,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:28,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:57:28,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:28,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:57:28,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:57:28,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:57:28,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 238 transitions, 2497 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 19:57:28,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:28,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:57:28,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:29,660 INFO L124 PetriNetUnfolderBase]: 2940/4762 cut-off events. [2024-06-27 19:57:29,660 INFO L125 PetriNetUnfolderBase]: For 574000/574003 co-relation queries the response was YES. [2024-06-27 19:57:29,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42206 conditions, 4762 events. 2940/4762 cut-off events. For 574000/574003 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 28719 event pairs, 789 based on Foata normal form. 4/4726 useless extension candidates. Maximal degree in co-relation 42105. Up to 4316 conditions per place. [2024-06-27 19:57:29,713 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 197 selfloop transitions, 40 changer transitions 0/260 dead transitions. [2024-06-27 19:57:29,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 260 transitions, 3226 flow [2024-06-27 19:57:29,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:57:29,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:57:29,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 19:57:29,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-27 19:57:29,714 INFO L175 Difference]: Start difference. First operand has 209 places, 238 transitions, 2497 flow. Second operand 8 states and 156 transitions. [2024-06-27 19:57:29,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 260 transitions, 3226 flow [2024-06-27 19:57:30,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 260 transitions, 3134 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-27 19:57:30,419 INFO L231 Difference]: Finished difference. Result has 211 places, 242 transitions, 2575 flow [2024-06-27 19:57:30,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2405, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2575, PETRI_PLACES=211, PETRI_TRANSITIONS=242} [2024-06-27 19:57:30,420 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 167 predicate places. [2024-06-27 19:57:30,420 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 242 transitions, 2575 flow [2024-06-27 19:57:30,420 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 19:57:30,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:30,420 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 19:57:30,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 19:57:30,421 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 19:57:30,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:30,421 INFO L85 PathProgramCache]: Analyzing trace with hash 719331916, now seen corresponding path program 11 times [2024-06-27 19:57:30,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:30,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393400981] [2024-06-27 19:57:30,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:30,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:30,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:31,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:31,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:31,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393400981] [2024-06-27 19:57:31,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393400981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:31,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:31,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:57:31,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139478902] [2024-06-27 19:57:31,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:31,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:57:31,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:31,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:57:31,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:57:31,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:57:31,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 242 transitions, 2575 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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 19:57:31,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:31,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:57:31,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:32,449 INFO L124 PetriNetUnfolderBase]: 3180/5082 cut-off events. [2024-06-27 19:57:32,449 INFO L125 PetriNetUnfolderBase]: For 623337/623346 co-relation queries the response was YES. [2024-06-27 19:57:32,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44169 conditions, 5082 events. 3180/5082 cut-off events. For 623337/623346 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 30175 event pairs, 783 based on Foata normal form. 23/5096 useless extension candidates. Maximal degree in co-relation 44067. Up to 4356 conditions per place. [2024-06-27 19:57:32,505 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 207 selfloop transitions, 66 changer transitions 0/278 dead transitions. [2024-06-27 19:57:32,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 278 transitions, 3271 flow [2024-06-27 19:57:32,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:57:32,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:57:32,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-27 19:57:32,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599483204134367 [2024-06-27 19:57:32,507 INFO L175 Difference]: Start difference. First operand has 211 places, 242 transitions, 2575 flow. Second operand 9 states and 178 transitions. [2024-06-27 19:57:32,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 278 transitions, 3271 flow [2024-06-27 19:57:33,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 278 transitions, 3138 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-27 19:57:33,242 INFO L231 Difference]: Finished difference. Result has 214 places, 243 transitions, 2623 flow [2024-06-27 19:57:33,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2442, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2623, PETRI_PLACES=214, PETRI_TRANSITIONS=243} [2024-06-27 19:57:33,243 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 170 predicate places. [2024-06-27 19:57:33,243 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 243 transitions, 2623 flow [2024-06-27 19:57:33,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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 19:57:33,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:33,244 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 19:57:33,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 19:57:33,244 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 19:57:33,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:33,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1647029202, now seen corresponding path program 12 times [2024-06-27 19:57:33,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:33,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363584884] [2024-06-27 19:57:33,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:33,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:33,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:33,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:33,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:33,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363584884] [2024-06-27 19:57:33,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363584884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:33,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:33,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:57:33,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030932841] [2024-06-27 19:57:33,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:33,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:57:33,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:33,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:57:33,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:57:34,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:57:34,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 243 transitions, 2623 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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 19:57:34,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:34,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:57:34,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:35,454 INFO L124 PetriNetUnfolderBase]: 3255/5217 cut-off events. [2024-06-27 19:57:35,454 INFO L125 PetriNetUnfolderBase]: For 645620/645629 co-relation queries the response was YES. [2024-06-27 19:57:35,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45381 conditions, 5217 events. 3255/5217 cut-off events. For 645620/645629 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 31264 event pairs, 802 based on Foata normal form. 23/5231 useless extension candidates. Maximal degree in co-relation 45278. Up to 4481 conditions per place. [2024-06-27 19:57:35,512 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 212 selfloop transitions, 63 changer transitions 0/280 dead transitions. [2024-06-27 19:57:35,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 280 transitions, 3329 flow [2024-06-27 19:57:35,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:57:35,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:57:35,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-27 19:57:35,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 19:57:35,514 INFO L175 Difference]: Start difference. First operand has 214 places, 243 transitions, 2623 flow. Second operand 9 states and 180 transitions. [2024-06-27 19:57:35,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 280 transitions, 3329 flow [2024-06-27 19:57:36,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 280 transitions, 3174 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-27 19:57:36,474 INFO L231 Difference]: Finished difference. Result has 216 places, 244 transitions, 2645 flow [2024-06-27 19:57:36,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2468, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2645, PETRI_PLACES=216, PETRI_TRANSITIONS=244} [2024-06-27 19:57:36,474 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 172 predicate places. [2024-06-27 19:57:36,475 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 244 transitions, 2645 flow [2024-06-27 19:57:36,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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 19:57:36,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:36,475 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 19:57:36,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 19:57:36,475 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 19:57:36,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:36,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1647206832, now seen corresponding path program 13 times [2024-06-27 19:57:36,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:36,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067788552] [2024-06-27 19:57:36,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:36,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:36,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:37,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:37,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:37,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067788552] [2024-06-27 19:57:37,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067788552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:37,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:37,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:57:37,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253798587] [2024-06-27 19:57:37,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:37,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:57:37,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:37,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:57:37,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:57:37,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:57:37,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 244 transitions, 2645 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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 19:57:37,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:37,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:57:37,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:38,516 INFO L124 PetriNetUnfolderBase]: 3313/5315 cut-off events. [2024-06-27 19:57:38,516 INFO L125 PetriNetUnfolderBase]: For 657191/657200 co-relation queries the response was YES. [2024-06-27 19:57:38,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46003 conditions, 5315 events. 3313/5315 cut-off events. For 657191/657200 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 32040 event pairs, 788 based on Foata normal form. 19/5325 useless extension candidates. Maximal degree in co-relation 45899. Up to 4183 conditions per place. [2024-06-27 19:57:38,564 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 214 selfloop transitions, 67 changer transitions 0/286 dead transitions. [2024-06-27 19:57:38,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 286 transitions, 3615 flow [2024-06-27 19:57:38,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:57:38,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:57:38,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-27 19:57:38,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4754521963824289 [2024-06-27 19:57:38,566 INFO L175 Difference]: Start difference. First operand has 216 places, 244 transitions, 2645 flow. Second operand 9 states and 184 transitions. [2024-06-27 19:57:38,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 286 transitions, 3615 flow [2024-06-27 19:57:39,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 286 transitions, 3464 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-27 19:57:39,359 INFO L231 Difference]: Finished difference. Result has 218 places, 245 transitions, 2678 flow [2024-06-27 19:57:39,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2494, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2678, PETRI_PLACES=218, PETRI_TRANSITIONS=245} [2024-06-27 19:57:39,375 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 174 predicate places. [2024-06-27 19:57:39,375 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 245 transitions, 2678 flow [2024-06-27 19:57:39,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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 19:57:39,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:39,376 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 19:57:39,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 19:57:39,376 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:39,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:39,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1357750698, now seen corresponding path program 14 times [2024-06-27 19:57:39,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:39,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172319991] [2024-06-27 19:57:39,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:39,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:39,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:40,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:40,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:40,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172319991] [2024-06-27 19:57:40,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172319991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:40,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:40,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:57:40,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951473043] [2024-06-27 19:57:40,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:40,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:57:40,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:40,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:57:40,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:57:40,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:57:40,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 245 transitions, 2678 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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 19:57:40,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:40,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:57:40,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:41,584 INFO L124 PetriNetUnfolderBase]: 3277/5259 cut-off events. [2024-06-27 19:57:41,584 INFO L125 PetriNetUnfolderBase]: For 642052/642061 co-relation queries the response was YES. [2024-06-27 19:57:41,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44511 conditions, 5259 events. 3277/5259 cut-off events. For 642052/642061 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 31679 event pairs, 790 based on Foata normal form. 23/5273 useless extension candidates. Maximal degree in co-relation 44406. Up to 4523 conditions per place. [2024-06-27 19:57:41,634 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 214 selfloop transitions, 62 changer transitions 0/281 dead transitions. [2024-06-27 19:57:41,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 281 transitions, 3344 flow [2024-06-27 19:57:41,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:57:41,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:57:41,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-27 19:57:41,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46770025839793283 [2024-06-27 19:57:41,635 INFO L175 Difference]: Start difference. First operand has 218 places, 245 transitions, 2678 flow. Second operand 9 states and 181 transitions. [2024-06-27 19:57:41,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 281 transitions, 3344 flow [2024-06-27 19:57:42,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 281 transitions, 3036 flow, removed 29 selfloop flow, removed 9 redundant places. [2024-06-27 19:57:42,398 INFO L231 Difference]: Finished difference. Result has 218 places, 245 transitions, 2501 flow [2024-06-27 19:57:42,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2370, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2501, PETRI_PLACES=218, PETRI_TRANSITIONS=245} [2024-06-27 19:57:42,398 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 174 predicate places. [2024-06-27 19:57:42,399 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 245 transitions, 2501 flow [2024-06-27 19:57:42,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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 19:57:42,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:42,399 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 19:57:42,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 19:57:42,399 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:42,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:42,399 INFO L85 PathProgramCache]: Analyzing trace with hash -3517583, now seen corresponding path program 3 times [2024-06-27 19:57:42,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:42,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405677280] [2024-06-27 19:57:42,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:42,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:42,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:43,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:43,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:43,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405677280] [2024-06-27 19:57:43,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405677280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:43,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:43,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:57:43,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750574] [2024-06-27 19:57:43,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:43,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:57:43,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:43,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:57:43,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:57:43,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:57:43,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 245 transitions, 2501 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 19:57:43,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:43,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:57:43,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:44,126 INFO L124 PetriNetUnfolderBase]: 3097/5030 cut-off events. [2024-06-27 19:57:44,127 INFO L125 PetriNetUnfolderBase]: For 612238/612244 co-relation queries the response was YES. [2024-06-27 19:57:44,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42488 conditions, 5030 events. 3097/5030 cut-off events. For 612238/612244 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 30885 event pairs, 840 based on Foata normal form. 2/4975 useless extension candidates. Maximal degree in co-relation 42384. Up to 4627 conditions per place. [2024-06-27 19:57:44,174 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 215 selfloop transitions, 23 changer transitions 0/261 dead transitions. [2024-06-27 19:57:44,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 261 transitions, 3017 flow [2024-06-27 19:57:44,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:57:44,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:57:44,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-27 19:57:44,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-27 19:57:44,175 INFO L175 Difference]: Start difference. First operand has 218 places, 245 transitions, 2501 flow. Second operand 7 states and 138 transitions. [2024-06-27 19:57:44,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 261 transitions, 3017 flow [2024-06-27 19:57:44,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 261 transitions, 2854 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-27 19:57:44,979 INFO L231 Difference]: Finished difference. Result has 217 places, 245 transitions, 2390 flow [2024-06-27 19:57:44,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2338, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2390, PETRI_PLACES=217, PETRI_TRANSITIONS=245} [2024-06-27 19:57:44,979 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 173 predicate places. [2024-06-27 19:57:44,980 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 245 transitions, 2390 flow [2024-06-27 19:57:44,980 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 19:57:44,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:44,980 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 19:57:44,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 19:57:44,980 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:44,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:44,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1049738325, now seen corresponding path program 4 times [2024-06-27 19:57:44,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:44,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465136899] [2024-06-27 19:57:44,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:44,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:45,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:45,729 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 19:57:45,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:45,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465136899] [2024-06-27 19:57:45,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465136899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:45,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:45,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:57:45,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107960680] [2024-06-27 19:57:45,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:45,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:57:45,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:45,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:57:45,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:57:45,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:57:45,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 245 transitions, 2390 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 19:57:45,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:45,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:57:45,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:46,654 INFO L124 PetriNetUnfolderBase]: 3102/5037 cut-off events. [2024-06-27 19:57:46,655 INFO L125 PetriNetUnfolderBase]: For 626514/626520 co-relation queries the response was YES. [2024-06-27 19:57:46,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42419 conditions, 5037 events. 3102/5037 cut-off events. For 626514/626520 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 30833 event pairs, 840 based on Foata normal form. 2/4982 useless extension candidates. Maximal degree in co-relation 42314. Up to 4622 conditions per place. [2024-06-27 19:57:46,801 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 206 selfloop transitions, 32 changer transitions 0/261 dead transitions. [2024-06-27 19:57:46,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 261 transitions, 2948 flow [2024-06-27 19:57:46,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:57:46,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:57:46,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-27 19:57:46,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45514950166112955 [2024-06-27 19:57:46,802 INFO L175 Difference]: Start difference. First operand has 217 places, 245 transitions, 2390 flow. Second operand 7 states and 137 transitions. [2024-06-27 19:57:46,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 261 transitions, 2948 flow [2024-06-27 19:57:47,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 261 transitions, 2849 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 19:57:47,558 INFO L231 Difference]: Finished difference. Result has 217 places, 248 transitions, 2417 flow [2024-06-27 19:57:47,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2291, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2417, PETRI_PLACES=217, PETRI_TRANSITIONS=248} [2024-06-27 19:57:47,559 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 173 predicate places. [2024-06-27 19:57:47,559 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 248 transitions, 2417 flow [2024-06-27 19:57:47,559 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 19:57:47,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:47,559 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 19:57:47,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 19:57:47,560 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:47,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:47,560 INFO L85 PathProgramCache]: Analyzing trace with hash 271056445, now seen corresponding path program 5 times [2024-06-27 19:57:47,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:47,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249756976] [2024-06-27 19:57:47,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:47,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:47,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:48,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:48,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:48,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249756976] [2024-06-27 19:57:48,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249756976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:48,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:48,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:57:48,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359192478] [2024-06-27 19:57:48,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:48,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:57:48,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:48,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:57:48,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:57:48,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:57:48,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 248 transitions, 2417 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 19:57:48,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:48,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:57:48,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:49,338 INFO L124 PetriNetUnfolderBase]: 3104/5045 cut-off events. [2024-06-27 19:57:49,338 INFO L125 PetriNetUnfolderBase]: For 642462/642471 co-relation queries the response was YES. [2024-06-27 19:57:49,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42603 conditions, 5045 events. 3104/5045 cut-off events. For 642462/642471 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 30977 event pairs, 856 based on Foata normal form. 5/4993 useless extension candidates. Maximal degree in co-relation 42497. Up to 4568 conditions per place. [2024-06-27 19:57:49,394 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 188 selfloop transitions, 51 changer transitions 0/262 dead transitions. [2024-06-27 19:57:49,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 262 transitions, 3127 flow [2024-06-27 19:57:49,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:57:49,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:57:49,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-27 19:57:49,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45514950166112955 [2024-06-27 19:57:49,395 INFO L175 Difference]: Start difference. First operand has 217 places, 248 transitions, 2417 flow. Second operand 7 states and 137 transitions. [2024-06-27 19:57:49,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 262 transitions, 3127 flow [2024-06-27 19:57:50,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 262 transitions, 3033 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 19:57:50,299 INFO L231 Difference]: Finished difference. Result has 219 places, 251 transitions, 2491 flow [2024-06-27 19:57:50,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2323, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2491, PETRI_PLACES=219, PETRI_TRANSITIONS=251} [2024-06-27 19:57:50,300 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 175 predicate places. [2024-06-27 19:57:50,300 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 251 transitions, 2491 flow [2024-06-27 19:57:50,300 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 19:57:50,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:50,300 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 19:57:50,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 19:57:50,300 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:50,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:50,301 INFO L85 PathProgramCache]: Analyzing trace with hash 616838415, now seen corresponding path program 6 times [2024-06-27 19:57:50,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:50,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12324598] [2024-06-27 19:57:50,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:50,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:50,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:51,104 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 19:57:51,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:51,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12324598] [2024-06-27 19:57:51,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12324598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:51,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:51,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:57:51,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932820843] [2024-06-27 19:57:51,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:51,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:57:51,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:51,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:57:51,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:57:51,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:57:51,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 251 transitions, 2491 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 19:57:51,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:51,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:57:51,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:52,033 INFO L124 PetriNetUnfolderBase]: 3099/5039 cut-off events. [2024-06-27 19:57:52,034 INFO L125 PetriNetUnfolderBase]: For 652514/652523 co-relation queries the response was YES. [2024-06-27 19:57:52,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42723 conditions, 5039 events. 3099/5039 cut-off events. For 652514/652523 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 30953 event pairs, 858 based on Foata normal form. 4/4986 useless extension candidates. Maximal degree in co-relation 42616. Up to 4563 conditions per place. [2024-06-27 19:57:52,090 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 183 selfloop transitions, 55 changer transitions 0/261 dead transitions. [2024-06-27 19:57:52,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 261 transitions, 2991 flow [2024-06-27 19:57:52,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:57:52,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:57:52,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-27 19:57:52,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485049833887043 [2024-06-27 19:57:52,091 INFO L175 Difference]: Start difference. First operand has 219 places, 251 transitions, 2491 flow. Second operand 7 states and 135 transitions. [2024-06-27 19:57:52,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 261 transitions, 2991 flow [2024-06-27 19:57:52,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 261 transitions, 2839 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-27 19:57:52,859 INFO L231 Difference]: Finished difference. Result has 222 places, 251 transitions, 2455 flow [2024-06-27 19:57:52,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2339, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2455, PETRI_PLACES=222, PETRI_TRANSITIONS=251} [2024-06-27 19:57:52,860 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 178 predicate places. [2024-06-27 19:57:52,860 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 251 transitions, 2455 flow [2024-06-27 19:57:52,860 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 19:57:52,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:52,860 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 19:57:52,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 19:57:52,860 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 19:57:52,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:52,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1388323908, now seen corresponding path program 1 times [2024-06-27 19:57:52,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:52,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690110814] [2024-06-27 19:57:52,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:52,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:52,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:53,906 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 19:57:53,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:53,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690110814] [2024-06-27 19:57:53,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690110814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:53,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:53,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:57:53,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606485873] [2024-06-27 19:57:53,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:53,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:57:53,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:53,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:57:53,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:57:53,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:57:53,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 251 transitions, 2455 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 19:57:53,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:53,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:57:53,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:55,283 INFO L124 PetriNetUnfolderBase]: 3289/5248 cut-off events. [2024-06-27 19:57:55,283 INFO L125 PetriNetUnfolderBase]: For 675738/675744 co-relation queries the response was YES. [2024-06-27 19:57:55,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44034 conditions, 5248 events. 3289/5248 cut-off events. For 675738/675744 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 31452 event pairs, 829 based on Foata normal form. 5/5228 useless extension candidates. Maximal degree in co-relation 43926. Up to 4645 conditions per place. [2024-06-27 19:57:55,344 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 212 selfloop transitions, 74 changer transitions 0/291 dead transitions. [2024-06-27 19:57:55,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 291 transitions, 3199 flow [2024-06-27 19:57:55,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:57:55,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:57:55,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-27 19:57:55,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-27 19:57:55,346 INFO L175 Difference]: Start difference. First operand has 222 places, 251 transitions, 2455 flow. Second operand 10 states and 196 transitions. [2024-06-27 19:57:55,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 291 transitions, 3199 flow [2024-06-27 19:57:56,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 291 transitions, 3049 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 19:57:56,166 INFO L231 Difference]: Finished difference. Result has 226 places, 256 transitions, 2550 flow [2024-06-27 19:57:56,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2305, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2550, PETRI_PLACES=226, PETRI_TRANSITIONS=256} [2024-06-27 19:57:56,166 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 182 predicate places. [2024-06-27 19:57:56,166 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 256 transitions, 2550 flow [2024-06-27 19:57:56,166 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 19:57:56,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:56,167 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 19:57:56,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 19:57:56,167 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 19:57:56,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:56,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1057896380, now seen corresponding path program 2 times [2024-06-27 19:57:56,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:56,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604133790] [2024-06-27 19:57:56,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:56,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:56,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:57,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:57,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:57,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604133790] [2024-06-27 19:57:57,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604133790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:57,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:57,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:57:57,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959987449] [2024-06-27 19:57:57,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:57,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:57:57,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:57,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:57:57,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:57:57,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:57:57,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 256 transitions, 2550 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 19:57:57,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:57,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:57:57,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:58,596 INFO L124 PetriNetUnfolderBase]: 3317/5297 cut-off events. [2024-06-27 19:57:58,596 INFO L125 PetriNetUnfolderBase]: For 697389/697395 co-relation queries the response was YES. [2024-06-27 19:57:58,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45288 conditions, 5297 events. 3317/5297 cut-off events. For 697389/697395 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 31798 event pairs, 828 based on Foata normal form. 5/5279 useless extension candidates. Maximal degree in co-relation 45178. Up to 4679 conditions per place. [2024-06-27 19:57:58,658 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 209 selfloop transitions, 88 changer transitions 0/302 dead transitions. [2024-06-27 19:57:58,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 302 transitions, 3396 flow [2024-06-27 19:57:58,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:57:58,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:57:58,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-27 19:57:58,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-27 19:57:58,659 INFO L175 Difference]: Start difference. First operand has 226 places, 256 transitions, 2550 flow. Second operand 10 states and 196 transitions. [2024-06-27 19:57:58,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 302 transitions, 3396 flow [2024-06-27 19:57:59,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 302 transitions, 3175 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-27 19:57:59,623 INFO L231 Difference]: Finished difference. Result has 230 places, 269 transitions, 2701 flow [2024-06-27 19:57:59,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2349, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2701, PETRI_PLACES=230, PETRI_TRANSITIONS=269} [2024-06-27 19:57:59,624 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 186 predicate places. [2024-06-27 19:57:59,624 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 269 transitions, 2701 flow [2024-06-27 19:57:59,624 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 19:57:59,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:59,624 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 19:57:59,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 19:57:59,625 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:59,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:59,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1047420860, now seen corresponding path program 3 times [2024-06-27 19:57:59,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:59,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115407612] [2024-06-27 19:57:59,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:59,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:59,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:00,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:00,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:00,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115407612] [2024-06-27 19:58:00,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115407612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:00,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:00,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:58:00,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604737847] [2024-06-27 19:58:00,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:00,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:58:00,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:00,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:58:00,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:58:00,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:58:00,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 269 transitions, 2701 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 19:58:00,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:00,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:58:00,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:01,904 INFO L124 PetriNetUnfolderBase]: 3350/5363 cut-off events. [2024-06-27 19:58:01,904 INFO L125 PetriNetUnfolderBase]: For 706679/706685 co-relation queries the response was YES. [2024-06-27 19:58:01,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45775 conditions, 5363 events. 3350/5363 cut-off events. For 706679/706685 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 32438 event pairs, 736 based on Foata normal form. 5/5343 useless extension candidates. Maximal degree in co-relation 45663. Up to 4540 conditions per place. [2024-06-27 19:58:01,965 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 211 selfloop transitions, 97 changer transitions 0/313 dead transitions. [2024-06-27 19:58:01,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 313 transitions, 3837 flow [2024-06-27 19:58:01,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:58:01,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:58:01,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-27 19:58:01,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697674418604651 [2024-06-27 19:58:01,966 INFO L175 Difference]: Start difference. First operand has 230 places, 269 transitions, 2701 flow. Second operand 10 states and 202 transitions. [2024-06-27 19:58:01,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 313 transitions, 3837 flow [2024-06-27 19:58:02,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 313 transitions, 3636 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-27 19:58:02,937 INFO L231 Difference]: Finished difference. Result has 236 places, 274 transitions, 2872 flow [2024-06-27 19:58:02,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2504, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2872, PETRI_PLACES=236, PETRI_TRANSITIONS=274} [2024-06-27 19:58:02,938 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 192 predicate places. [2024-06-27 19:58:02,938 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 274 transitions, 2872 flow [2024-06-27 19:58:02,938 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 19:58:02,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:02,939 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 19:58:02,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 19:58:02,939 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:02,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:02,939 INFO L85 PathProgramCache]: Analyzing trace with hash -704577468, now seen corresponding path program 4 times [2024-06-27 19:58:02,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:02,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693180413] [2024-06-27 19:58:02,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:02,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:02,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:03,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:03,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:03,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693180413] [2024-06-27 19:58:03,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693180413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:03,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:03,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:58:03,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657608535] [2024-06-27 19:58:03,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:03,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:58:03,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:03,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:58:03,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:58:04,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:58:04,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 274 transitions, 2872 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 19:58:04,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:04,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:58:04,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:05,348 INFO L124 PetriNetUnfolderBase]: 3367/5393 cut-off events. [2024-06-27 19:58:05,348 INFO L125 PetriNetUnfolderBase]: For 725701/725707 co-relation queries the response was YES. [2024-06-27 19:58:05,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46017 conditions, 5393 events. 3367/5393 cut-off events. For 725701/725707 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 32604 event pairs, 837 based on Foata normal form. 5/5375 useless extension candidates. Maximal degree in co-relation 45903. Up to 4765 conditions per place. [2024-06-27 19:58:05,408 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 221 selfloop transitions, 85 changer transitions 0/311 dead transitions. [2024-06-27 19:58:05,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 311 transitions, 3666 flow [2024-06-27 19:58:05,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:58:05,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:58:05,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-27 19:58:05,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-27 19:58:05,410 INFO L175 Difference]: Start difference. First operand has 236 places, 274 transitions, 2872 flow. Second operand 10 states and 196 transitions. [2024-06-27 19:58:05,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 311 transitions, 3666 flow [2024-06-27 19:58:06,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 311 transitions, 3404 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-27 19:58:06,348 INFO L231 Difference]: Finished difference. Result has 240 places, 277 transitions, 2886 flow [2024-06-27 19:58:06,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2630, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2886, PETRI_PLACES=240, PETRI_TRANSITIONS=277} [2024-06-27 19:58:06,349 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 196 predicate places. [2024-06-27 19:58:06,349 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 277 transitions, 2886 flow [2024-06-27 19:58:06,349 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 19:58:06,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:06,349 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 19:58:06,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 19:58:06,349 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:06,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:06,350 INFO L85 PathProgramCache]: Analyzing trace with hash -729112414, now seen corresponding path program 5 times [2024-06-27 19:58:06,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:06,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95082561] [2024-06-27 19:58:06,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:06,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:06,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:07,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:07,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:07,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95082561] [2024-06-27 19:58:07,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95082561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:07,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:07,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:58:07,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168266358] [2024-06-27 19:58:07,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:07,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:58:07,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:07,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:58:07,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:58:07,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:58:07,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 277 transitions, 2886 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 19:58:07,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:07,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:58:07,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:08,622 INFO L124 PetriNetUnfolderBase]: 3359/5381 cut-off events. [2024-06-27 19:58:08,623 INFO L125 PetriNetUnfolderBase]: For 731797/731803 co-relation queries the response was YES. [2024-06-27 19:58:08,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45445 conditions, 5381 events. 3359/5381 cut-off events. For 731797/731803 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 32509 event pairs, 835 based on Foata normal form. 5/5363 useless extension candidates. Maximal degree in co-relation 45329. Up to 4753 conditions per place. [2024-06-27 19:58:08,679 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 219 selfloop transitions, 87 changer transitions 0/311 dead transitions. [2024-06-27 19:58:08,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 311 transitions, 3593 flow [2024-06-27 19:58:08,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:58:08,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:58:08,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-27 19:58:08,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-27 19:58:08,680 INFO L175 Difference]: Start difference. First operand has 240 places, 277 transitions, 2886 flow. Second operand 10 states and 196 transitions. [2024-06-27 19:58:08,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 311 transitions, 3593 flow [2024-06-27 19:58:09,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 311 transitions, 3350 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-27 19:58:09,684 INFO L231 Difference]: Finished difference. Result has 244 places, 278 transitions, 2845 flow [2024-06-27 19:58:09,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2643, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2845, PETRI_PLACES=244, PETRI_TRANSITIONS=278} [2024-06-27 19:58:09,684 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 200 predicate places. [2024-06-27 19:58:09,685 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 278 transitions, 2845 flow [2024-06-27 19:58:09,685 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 19:58:09,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:09,685 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 19:58:09,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 19:58:09,685 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 19:58:09,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:09,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1300521350, now seen corresponding path program 4 times [2024-06-27 19:58:09,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:09,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763272650] [2024-06-27 19:58:09,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:09,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:09,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:10,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:10,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:10,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763272650] [2024-06-27 19:58:10,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763272650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:10,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:10,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:58:10,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99991801] [2024-06-27 19:58:10,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:10,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:58:10,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:10,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:58:10,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:58:10,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:58:10,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 278 transitions, 2845 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 19:58:10,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:10,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:58:10,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:11,688 INFO L124 PetriNetUnfolderBase]: 3196/5222 cut-off events. [2024-06-27 19:58:11,688 INFO L125 PetriNetUnfolderBase]: For 743628/743637 co-relation queries the response was YES. [2024-06-27 19:58:11,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44709 conditions, 5222 events. 3196/5222 cut-off events. For 743628/743637 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 32500 event pairs, 787 based on Foata normal form. 5/5170 useless extension candidates. Maximal degree in co-relation 44591. Up to 4715 conditions per place. [2024-06-27 19:58:11,746 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 213 selfloop transitions, 57 changer transitions 0/293 dead transitions. [2024-06-27 19:58:11,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 293 transitions, 3499 flow [2024-06-27 19:58:11,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:58:11,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:58:11,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 19:58:11,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 19:58:11,748 INFO L175 Difference]: Start difference. First operand has 244 places, 278 transitions, 2845 flow. Second operand 8 states and 152 transitions. [2024-06-27 19:58:11,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 293 transitions, 3499 flow [2024-06-27 19:58:12,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 293 transitions, 3298 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-27 19:58:12,816 INFO L231 Difference]: Finished difference. Result has 245 places, 282 transitions, 2861 flow [2024-06-27 19:58:12,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2644, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2861, PETRI_PLACES=245, PETRI_TRANSITIONS=282} [2024-06-27 19:58:12,817 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 201 predicate places. [2024-06-27 19:58:12,817 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 282 transitions, 2861 flow [2024-06-27 19:58:12,817 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 19:58:12,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:12,818 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 19:58:12,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 19:58:12,818 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 19:58:12,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:12,818 INFO L85 PathProgramCache]: Analyzing trace with hash 611134415, now seen corresponding path program 2 times [2024-06-27 19:58:12,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:12,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555594422] [2024-06-27 19:58:12,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:12,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:12,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:13,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:13,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:13,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555594422] [2024-06-27 19:58:13,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555594422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:13,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:13,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:58:13,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785683972] [2024-06-27 19:58:13,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:13,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:58:13,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:13,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:58:13,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:58:13,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:58:13,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 282 transitions, 2861 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 19:58:13,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:13,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:58:13,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:14,929 INFO L124 PetriNetUnfolderBase]: 3206/5237 cut-off events. [2024-06-27 19:58:14,929 INFO L125 PetriNetUnfolderBase]: For 761073/761082 co-relation queries the response was YES. [2024-06-27 19:58:14,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45242 conditions, 5237 events. 3206/5237 cut-off events. For 761073/761082 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 32501 event pairs, 762 based on Foata normal form. 8/5192 useless extension candidates. Maximal degree in co-relation 45123. Up to 4852 conditions per place. [2024-06-27 19:58:14,986 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 252 selfloop transitions, 22 changer transitions 0/297 dead transitions. [2024-06-27 19:58:14,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 297 transitions, 3519 flow [2024-06-27 19:58:14,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:58:14,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:58:14,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 19:58:14,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-27 19:58:14,988 INFO L175 Difference]: Start difference. First operand has 245 places, 282 transitions, 2861 flow. Second operand 8 states and 145 transitions. [2024-06-27 19:58:14,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 297 transitions, 3519 flow [2024-06-27 19:58:15,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 297 transitions, 3330 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-27 19:58:15,974 INFO L231 Difference]: Finished difference. Result has 247 places, 285 transitions, 2810 flow [2024-06-27 19:58:15,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2672, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2810, PETRI_PLACES=247, PETRI_TRANSITIONS=285} [2024-06-27 19:58:15,975 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 203 predicate places. [2024-06-27 19:58:15,975 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 285 transitions, 2810 flow [2024-06-27 19:58:15,975 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 19:58:15,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:15,976 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 19:58:15,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 19:58:15,976 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 19:58:15,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:15,976 INFO L85 PathProgramCache]: Analyzing trace with hash 626371535, now seen corresponding path program 3 times [2024-06-27 19:58:15,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:15,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496692622] [2024-06-27 19:58:15,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:15,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:15,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:16,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:16,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:16,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496692622] [2024-06-27 19:58:16,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496692622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:16,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:16,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:58:16,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255342776] [2024-06-27 19:58:16,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:16,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:58:16,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:16,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:58:16,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:58:17,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:58:17,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 285 transitions, 2810 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 19:58:17,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:17,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:58:17,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:18,179 INFO L124 PetriNetUnfolderBase]: 3216/5249 cut-off events. [2024-06-27 19:58:18,180 INFO L125 PetriNetUnfolderBase]: For 778424/778424 co-relation queries the response was YES. [2024-06-27 19:58:18,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45711 conditions, 5249 events. 3216/5249 cut-off events. For 778424/778424 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 32530 event pairs, 751 based on Foata normal form. 2/5200 useless extension candidates. Maximal degree in co-relation 45591. Up to 4879 conditions per place. [2024-06-27 19:58:18,241 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 261 selfloop transitions, 17 changer transitions 0/301 dead transitions. [2024-06-27 19:58:18,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 301 transitions, 3484 flow [2024-06-27 19:58:18,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:58:18,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:58:18,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 19:58:18,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-27 19:58:18,242 INFO L175 Difference]: Start difference. First operand has 247 places, 285 transitions, 2810 flow. Second operand 8 states and 144 transitions. [2024-06-27 19:58:18,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 301 transitions, 3484 flow [2024-06-27 19:58:19,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 301 transitions, 3368 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-27 19:58:19,310 INFO L231 Difference]: Finished difference. Result has 249 places, 288 transitions, 2828 flow [2024-06-27 19:58:19,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2694, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2828, PETRI_PLACES=249, PETRI_TRANSITIONS=288} [2024-06-27 19:58:19,311 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 205 predicate places. [2024-06-27 19:58:19,311 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 288 transitions, 2828 flow [2024-06-27 19:58:19,311 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 19:58:19,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:19,311 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 19:58:19,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 19:58:19,312 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 19:58:19,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:19,312 INFO L85 PathProgramCache]: Analyzing trace with hash 611133950, now seen corresponding path program 5 times [2024-06-27 19:58:19,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:19,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064777325] [2024-06-27 19:58:19,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:19,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:19,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:20,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:20,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:20,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064777325] [2024-06-27 19:58:20,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064777325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:20,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:20,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:58:20,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428675808] [2024-06-27 19:58:20,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:20,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:58:20,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:20,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:58:20,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:58:20,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:58:20,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 288 transitions, 2828 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 19:58:20,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:20,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:58:20,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:21,345 INFO L124 PetriNetUnfolderBase]: 3244/5294 cut-off events. [2024-06-27 19:58:21,346 INFO L125 PetriNetUnfolderBase]: For 802537/802546 co-relation queries the response was YES. [2024-06-27 19:58:21,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46649 conditions, 5294 events. 3244/5294 cut-off events. For 802537/802546 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 32938 event pairs, 787 based on Foata normal form. 5/5242 useless extension candidates. Maximal degree in co-relation 46528. Up to 4754 conditions per place. [2024-06-27 19:58:21,402 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 224 selfloop transitions, 61 changer transitions 0/308 dead transitions. [2024-06-27 19:58:21,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 308 transitions, 3790 flow [2024-06-27 19:58:21,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:58:21,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:58:21,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 19:58:21,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-27 19:58:21,403 INFO L175 Difference]: Start difference. First operand has 249 places, 288 transitions, 2828 flow. Second operand 8 states and 154 transitions. [2024-06-27 19:58:21,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 308 transitions, 3790 flow [2024-06-27 19:58:22,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 308 transitions, 3648 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-27 19:58:22,189 INFO L231 Difference]: Finished difference. Result has 251 places, 296 transitions, 3035 flow [2024-06-27 19:58:22,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2686, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3035, PETRI_PLACES=251, PETRI_TRANSITIONS=296} [2024-06-27 19:58:22,190 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 207 predicate places. [2024-06-27 19:58:22,190 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 296 transitions, 3035 flow [2024-06-27 19:58:22,190 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 19:58:22,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:22,190 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 19:58:22,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 19:58:22,191 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 19:58:22,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:22,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1315266500, now seen corresponding path program 6 times [2024-06-27 19:58:22,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:22,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804974189] [2024-06-27 19:58:22,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:22,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:22,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:23,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:23,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:23,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804974189] [2024-06-27 19:58:23,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804974189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:23,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:23,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:58:23,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630077832] [2024-06-27 19:58:23,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:23,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:58:23,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:23,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:58:23,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:58:23,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:58:23,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 296 transitions, 3035 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 19:58:23,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:23,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:58:23,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:24,340 INFO L124 PetriNetUnfolderBase]: 3248/5301 cut-off events. [2024-06-27 19:58:24,340 INFO L125 PetriNetUnfolderBase]: For 821003/821012 co-relation queries the response was YES. [2024-06-27 19:58:24,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47434 conditions, 5301 events. 3248/5301 cut-off events. For 821003/821012 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 32979 event pairs, 784 based on Foata normal form. 5/5249 useless extension candidates. Maximal degree in co-relation 47312. Up to 4680 conditions per place. [2024-06-27 19:58:24,398 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 214 selfloop transitions, 87 changer transitions 0/324 dead transitions. [2024-06-27 19:58:24,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 324 transitions, 4259 flow [2024-06-27 19:58:24,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:58:24,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:58:24,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 19:58:24,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-27 19:58:24,400 INFO L175 Difference]: Start difference. First operand has 251 places, 296 transitions, 3035 flow. Second operand 8 states and 156 transitions. [2024-06-27 19:58:24,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 324 transitions, 4259 flow [2024-06-27 19:58:25,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 324 transitions, 4081 flow, removed 60 selfloop flow, removed 4 redundant places. [2024-06-27 19:58:25,312 INFO L231 Difference]: Finished difference. Result has 257 places, 311 transitions, 3366 flow [2024-06-27 19:58:25,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2857, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3366, PETRI_PLACES=257, PETRI_TRANSITIONS=311} [2024-06-27 19:58:25,312 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 213 predicate places. [2024-06-27 19:58:25,313 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 311 transitions, 3366 flow [2024-06-27 19:58:25,313 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 19:58:25,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:25,313 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 19:58:25,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 19:58:25,313 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 19:58:25,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:25,314 INFO L85 PathProgramCache]: Analyzing trace with hash 625866545, now seen corresponding path program 4 times [2024-06-27 19:58:25,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:25,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568423525] [2024-06-27 19:58:25,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:25,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:25,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:26,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:26,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:26,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568423525] [2024-06-27 19:58:26,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568423525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:26,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:26,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:58:26,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026257113] [2024-06-27 19:58:26,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:26,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:58:26,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:26,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:58:26,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:58:26,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:58:26,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 311 transitions, 3366 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 19:58:26,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:26,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:58:26,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:27,465 INFO L124 PetriNetUnfolderBase]: 3242/5294 cut-off events. [2024-06-27 19:58:27,465 INFO L125 PetriNetUnfolderBase]: For 836820/836829 co-relation queries the response was YES. [2024-06-27 19:58:27,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48160 conditions, 5294 events. 3242/5294 cut-off events. For 836820/836829 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 32907 event pairs, 756 based on Foata normal form. 8/5249 useless extension candidates. Maximal degree in co-relation 48034. Up to 4868 conditions per place. [2024-06-27 19:58:27,530 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 266 selfloop transitions, 39 changer transitions 0/328 dead transitions. [2024-06-27 19:58:27,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 328 transitions, 4110 flow [2024-06-27 19:58:27,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:58:27,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:58:27,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 19:58:27,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-27 19:58:27,532 INFO L175 Difference]: Start difference. First operand has 257 places, 311 transitions, 3366 flow. Second operand 8 states and 150 transitions. [2024-06-27 19:58:27,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 328 transitions, 4110 flow [2024-06-27 19:58:28,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 328 transitions, 3910 flow, removed 74 selfloop flow, removed 3 redundant places. [2024-06-27 19:58:28,643 INFO L231 Difference]: Finished difference. Result has 262 places, 314 transitions, 3358 flow [2024-06-27 19:58:28,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3166, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3358, PETRI_PLACES=262, PETRI_TRANSITIONS=314} [2024-06-27 19:58:28,644 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 218 predicate places. [2024-06-27 19:58:28,644 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 314 transitions, 3358 flow [2024-06-27 19:58:28,644 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 19:58:28,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:28,644 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 19:58:28,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 19:58:28,645 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:28,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:28,645 INFO L85 PathProgramCache]: Analyzing trace with hash 64468601, now seen corresponding path program 1 times [2024-06-27 19:58:28,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:28,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112316798] [2024-06-27 19:58:28,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:28,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:28,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:29,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:29,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:29,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112316798] [2024-06-27 19:58:29,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112316798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:29,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:29,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:58:29,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672781680] [2024-06-27 19:58:29,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:29,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:58:29,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:29,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:58:29,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:58:29,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:58:29,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 314 transitions, 3358 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 19:58:29,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:29,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:58:29,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:30,617 INFO L124 PetriNetUnfolderBase]: 3322/5418 cut-off events. [2024-06-27 19:58:30,617 INFO L125 PetriNetUnfolderBase]: For 852153/852153 co-relation queries the response was YES. [2024-06-27 19:58:30,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48256 conditions, 5418 events. 3322/5418 cut-off events. For 852153/852153 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 33560 event pairs, 753 based on Foata normal form. 2/5417 useless extension candidates. Maximal degree in co-relation 48128. Up to 4994 conditions per place. [2024-06-27 19:58:30,678 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 301 selfloop transitions, 17 changer transitions 0/338 dead transitions. [2024-06-27 19:58:30,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 338 transitions, 4108 flow [2024-06-27 19:58:30,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:58:30,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:58:30,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 19:58:30,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 19:58:30,680 INFO L175 Difference]: Start difference. First operand has 262 places, 314 transitions, 3358 flow. Second operand 8 states and 152 transitions. [2024-06-27 19:58:30,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 338 transitions, 4108 flow [2024-06-27 19:58:31,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 338 transitions, 3938 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-27 19:58:31,962 INFO L231 Difference]: Finished difference. Result has 264 places, 317 transitions, 3294 flow [2024-06-27 19:58:31,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3188, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3294, PETRI_PLACES=264, PETRI_TRANSITIONS=317} [2024-06-27 19:58:31,963 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 220 predicate places. [2024-06-27 19:58:31,963 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 317 transitions, 3294 flow [2024-06-27 19:58:31,963 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 19:58:31,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:31,963 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 19:58:31,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 19:58:31,963 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:31,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:31,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1879780593, now seen corresponding path program 2 times [2024-06-27 19:58:31,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:31,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794593861] [2024-06-27 19:58:31,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:31,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:31,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:32,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:32,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:32,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794593861] [2024-06-27 19:58:32,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794593861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:32,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:32,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:58:32,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085609909] [2024-06-27 19:58:32,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:32,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:58:32,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:32,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:58:32,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:58:32,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:58:32,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 317 transitions, 3294 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 19:58:32,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:32,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:58:32,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:33,998 INFO L124 PetriNetUnfolderBase]: 3332/5434 cut-off events. [2024-06-27 19:58:33,999 INFO L125 PetriNetUnfolderBase]: For 868867/868867 co-relation queries the response was YES. [2024-06-27 19:58:34,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48804 conditions, 5434 events. 3332/5434 cut-off events. For 868867/868867 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 33635 event pairs, 753 based on Foata normal form. 2/5433 useless extension candidates. Maximal degree in co-relation 48675. Up to 4999 conditions per place. [2024-06-27 19:58:34,055 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 297 selfloop transitions, 22 changer transitions 0/339 dead transitions. [2024-06-27 19:58:34,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 339 transitions, 4048 flow [2024-06-27 19:58:34,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:58:34,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:58:34,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 19:58:34,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 19:58:34,056 INFO L175 Difference]: Start difference. First operand has 264 places, 317 transitions, 3294 flow. Second operand 8 states and 152 transitions. [2024-06-27 19:58:34,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 339 transitions, 4048 flow [2024-06-27 19:58:35,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 339 transitions, 3964 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-27 19:58:35,504 INFO L231 Difference]: Finished difference. Result has 266 places, 320 transitions, 3332 flow [2024-06-27 19:58:35,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3210, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3332, PETRI_PLACES=266, PETRI_TRANSITIONS=320} [2024-06-27 19:58:35,505 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 222 predicate places. [2024-06-27 19:58:35,505 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 320 transitions, 3332 flow [2024-06-27 19:58:35,505 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 19:58:35,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:35,505 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 19:58:35,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 19:58:35,506 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:35,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:35,506 INFO L85 PathProgramCache]: Analyzing trace with hash 64618548, now seen corresponding path program 1 times [2024-06-27 19:58:35,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:35,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961711318] [2024-06-27 19:58:35,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:35,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:35,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:36,380 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 19:58:36,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:36,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961711318] [2024-06-27 19:58:36,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961711318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:36,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:36,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:58:36,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135771602] [2024-06-27 19:58:36,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:36,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:58:36,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:36,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:58:36,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:58:36,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:58:36,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 320 transitions, 3332 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 19:58:36,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:36,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:58:36,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:37,699 INFO L124 PetriNetUnfolderBase]: 3342/5450 cut-off events. [2024-06-27 19:58:37,699 INFO L125 PetriNetUnfolderBase]: For 892014/892014 co-relation queries the response was YES. [2024-06-27 19:58:37,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49484 conditions, 5450 events. 3342/5450 cut-off events. For 892014/892014 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 33763 event pairs, 752 based on Foata normal form. 3/5450 useless extension candidates. Maximal degree in co-relation 49354. Up to 5028 conditions per place. [2024-06-27 19:58:37,757 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 304 selfloop transitions, 17 changer transitions 0/341 dead transitions. [2024-06-27 19:58:37,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 341 transitions, 4086 flow [2024-06-27 19:58:37,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:58:37,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:58:37,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 19:58:37,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-27 19:58:37,758 INFO L175 Difference]: Start difference. First operand has 266 places, 320 transitions, 3332 flow. Second operand 8 states and 149 transitions. [2024-06-27 19:58:37,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 341 transitions, 4086 flow [2024-06-27 19:58:39,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 341 transitions, 3986 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 19:58:39,194 INFO L231 Difference]: Finished difference. Result has 268 places, 323 transitions, 3346 flow [2024-06-27 19:58:39,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3232, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3346, PETRI_PLACES=268, PETRI_TRANSITIONS=323} [2024-06-27 19:58:39,195 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 224 predicate places. [2024-06-27 19:58:39,195 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 323 transitions, 3346 flow [2024-06-27 19:58:39,195 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 19:58:39,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:39,195 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 19:58:39,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 19:58:39,196 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:39,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:39,196 INFO L85 PathProgramCache]: Analyzing trace with hash -672759750, now seen corresponding path program 2 times [2024-06-27 19:58:39,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:39,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484994642] [2024-06-27 19:58:39,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:39,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:39,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:40,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:40,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:40,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484994642] [2024-06-27 19:58:40,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484994642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:40,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:40,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:58:40,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522988187] [2024-06-27 19:58:40,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:40,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:58:40,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:40,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:58:40,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:58:40,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:58:40,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 323 transitions, 3346 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 19:58:40,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:40,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:58:40,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:41,437 INFO L124 PetriNetUnfolderBase]: 3352/5464 cut-off events. [2024-06-27 19:58:41,438 INFO L125 PetriNetUnfolderBase]: For 905398/905398 co-relation queries the response was YES. [2024-06-27 19:58:41,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49973 conditions, 5464 events. 3352/5464 cut-off events. For 905398/905398 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 33809 event pairs, 750 based on Foata normal form. 2/5463 useless extension candidates. Maximal degree in co-relation 49842. Up to 5037 conditions per place. [2024-06-27 19:58:41,507 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 298 selfloop transitions, 22 changer transitions 0/340 dead transitions. [2024-06-27 19:58:41,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 340 transitions, 4076 flow [2024-06-27 19:58:41,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:58:41,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:58:41,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 19:58:41,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-27 19:58:41,508 INFO L175 Difference]: Start difference. First operand has 268 places, 323 transitions, 3346 flow. Second operand 8 states and 147 transitions. [2024-06-27 19:58:41,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 340 transitions, 4076 flow [2024-06-27 19:58:42,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 340 transitions, 3984 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-27 19:58:42,864 INFO L231 Difference]: Finished difference. Result has 270 places, 326 transitions, 3366 flow [2024-06-27 19:58:42,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3254, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3366, PETRI_PLACES=270, PETRI_TRANSITIONS=326} [2024-06-27 19:58:42,864 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 226 predicate places. [2024-06-27 19:58:42,864 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 326 transitions, 3366 flow [2024-06-27 19:58:42,864 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 19:58:42,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:42,865 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 19:58:42,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 19:58:42,865 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:42,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:42,865 INFO L85 PathProgramCache]: Analyzing trace with hash -672759967, now seen corresponding path program 3 times [2024-06-27 19:58:42,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:42,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226579727] [2024-06-27 19:58:42,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:42,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:42,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:43,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:43,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:43,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226579727] [2024-06-27 19:58:43,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226579727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:43,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:43,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:58:43,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349175034] [2024-06-27 19:58:43,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:43,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:58:43,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:43,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:58:43,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:58:43,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:58:43,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 326 transitions, 3366 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 19:58:43,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:43,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:58:43,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:44,930 INFO L124 PetriNetUnfolderBase]: 3362/5480 cut-off events. [2024-06-27 19:58:44,930 INFO L125 PetriNetUnfolderBase]: For 923800/923800 co-relation queries the response was YES. [2024-06-27 19:58:44,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50534 conditions, 5480 events. 3362/5480 cut-off events. For 923800/923800 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 33926 event pairs, 753 based on Foata normal form. 2/5479 useless extension candidates. Maximal degree in co-relation 50402. Up to 5027 conditions per place. [2024-06-27 19:58:45,000 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 296 selfloop transitions, 29 changer transitions 0/345 dead transitions. [2024-06-27 19:58:45,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 345 transitions, 4134 flow [2024-06-27 19:58:45,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:58:45,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:58:45,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 19:58:45,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-27 19:58:45,001 INFO L175 Difference]: Start difference. First operand has 270 places, 326 transitions, 3366 flow. Second operand 8 states and 151 transitions. [2024-06-27 19:58:45,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 345 transitions, 4134 flow [2024-06-27 19:58:46,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 345 transitions, 4044 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-27 19:58:46,769 INFO L231 Difference]: Finished difference. Result has 272 places, 329 transitions, 3422 flow [2024-06-27 19:58:46,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3276, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3422, PETRI_PLACES=272, PETRI_TRANSITIONS=329} [2024-06-27 19:58:46,769 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 228 predicate places. [2024-06-27 19:58:46,769 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 329 transitions, 3422 flow [2024-06-27 19:58:46,769 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 19:58:46,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:46,770 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 19:58:46,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 19:58:46,770 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:46,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:46,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1885352440, now seen corresponding path program 3 times [2024-06-27 19:58:46,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:46,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566318973] [2024-06-27 19:58:46,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:46,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:46,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:47,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:47,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:47,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566318973] [2024-06-27 19:58:47,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566318973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:47,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:47,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:58:47,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724194318] [2024-06-27 19:58:47,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:47,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:58:47,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:47,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:58:47,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:58:47,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:58:47,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 329 transitions, 3422 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 19:58:47,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:47,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:58:47,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:48,961 INFO L124 PetriNetUnfolderBase]: 3385/5512 cut-off events. [2024-06-27 19:58:48,961 INFO L125 PetriNetUnfolderBase]: For 953344/953344 co-relation queries the response was YES. [2024-06-27 19:58:49,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51604 conditions, 5512 events. 3385/5512 cut-off events. For 953344/953344 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 34121 event pairs, 753 based on Foata normal form. 3/5512 useless extension candidates. Maximal degree in co-relation 51471. Up to 5054 conditions per place. [2024-06-27 19:58:49,040 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 298 selfloop transitions, 34 changer transitions 0/352 dead transitions. [2024-06-27 19:58:49,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 352 transitions, 4476 flow [2024-06-27 19:58:49,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:58:49,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:58:49,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 19:58:49,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-27 19:58:49,041 INFO L175 Difference]: Start difference. First operand has 272 places, 329 transitions, 3422 flow. Second operand 8 states and 151 transitions. [2024-06-27 19:58:49,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 352 transitions, 4476 flow [2024-06-27 19:58:50,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 352 transitions, 4352 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-27 19:58:50,839 INFO L231 Difference]: Finished difference. Result has 274 places, 335 transitions, 3539 flow [2024-06-27 19:58:50,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3298, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3539, PETRI_PLACES=274, PETRI_TRANSITIONS=335} [2024-06-27 19:58:50,840 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 230 predicate places. [2024-06-27 19:58:50,840 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 335 transitions, 3539 flow [2024-06-27 19:58:50,841 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 19:58:50,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:50,841 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 19:58:50,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 19:58:50,841 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:50,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:50,841 INFO L85 PathProgramCache]: Analyzing trace with hash 616854008, now seen corresponding path program 4 times [2024-06-27 19:58:50,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:50,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412574969] [2024-06-27 19:58:50,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:50,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:50,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:51,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:51,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:51,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412574969] [2024-06-27 19:58:51,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412574969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:51,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:51,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:58:51,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120114217] [2024-06-27 19:58:51,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:51,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:58:51,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:51,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:58:51,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:58:52,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:58:52,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 335 transitions, 3539 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 19:58:52,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:52,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:58:52,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:53,102 INFO L124 PetriNetUnfolderBase]: 3406/5544 cut-off events. [2024-06-27 19:58:53,103 INFO L125 PetriNetUnfolderBase]: For 979524/979527 co-relation queries the response was YES. [2024-06-27 19:58:53,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52495 conditions, 5544 events. 3406/5544 cut-off events. For 979524/979527 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 34382 event pairs, 761 based on Foata normal form. 2/5542 useless extension candidates. Maximal degree in co-relation 52361. Up to 5087 conditions per place. [2024-06-27 19:58:53,184 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 300 selfloop transitions, 35 changer transitions 0/355 dead transitions. [2024-06-27 19:58:53,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 355 transitions, 4573 flow [2024-06-27 19:58:53,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:58:53,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:58:53,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 19:58:53,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-27 19:58:53,186 INFO L175 Difference]: Start difference. First operand has 274 places, 335 transitions, 3539 flow. Second operand 8 states and 149 transitions. [2024-06-27 19:58:53,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 355 transitions, 4573 flow [2024-06-27 19:58:55,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 355 transitions, 4463 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-27 19:58:55,143 INFO L231 Difference]: Finished difference. Result has 278 places, 343 transitions, 3673 flow [2024-06-27 19:58:55,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3433, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3673, PETRI_PLACES=278, PETRI_TRANSITIONS=343} [2024-06-27 19:58:55,144 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 234 predicate places. [2024-06-27 19:58:55,144 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 343 transitions, 3673 flow [2024-06-27 19:58:55,144 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 19:58:55,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:55,145 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 19:58:55,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 19:58:55,145 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:55,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:55,145 INFO L85 PathProgramCache]: Analyzing trace with hash 616846568, now seen corresponding path program 5 times [2024-06-27 19:58:55,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:55,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171734027] [2024-06-27 19:58:55,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:55,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:55,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:56,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:56,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:56,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171734027] [2024-06-27 19:58:56,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171734027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:56,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:56,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:58:56,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822020760] [2024-06-27 19:58:56,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:56,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:58:56,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:56,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:58:56,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:58:56,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:58:56,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 343 transitions, 3673 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 19:58:56,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:56,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:58:56,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:57,239 INFO L124 PetriNetUnfolderBase]: 3400/5536 cut-off events. [2024-06-27 19:58:57,240 INFO L125 PetriNetUnfolderBase]: For 989105/989108 co-relation queries the response was YES. [2024-06-27 19:58:57,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52528 conditions, 5536 events. 3400/5536 cut-off events. For 989105/989108 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 34323 event pairs, 763 based on Foata normal form. 2/5534 useless extension candidates. Maximal degree in co-relation 52392. Up to 5091 conditions per place. [2024-06-27 19:58:57,314 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 306 selfloop transitions, 29 changer transitions 0/355 dead transitions. [2024-06-27 19:58:57,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 355 transitions, 4376 flow [2024-06-27 19:58:57,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:58:57,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:58:57,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 19:58:57,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-27 19:58:57,315 INFO L175 Difference]: Start difference. First operand has 278 places, 343 transitions, 3673 flow. Second operand 8 states and 146 transitions. [2024-06-27 19:58:57,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 355 transitions, 4376 flow [2024-06-27 19:58:59,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 355 transitions, 4226 flow, removed 60 selfloop flow, removed 4 redundant places. [2024-06-27 19:58:59,828 INFO L231 Difference]: Finished difference. Result has 282 places, 344 transitions, 3596 flow [2024-06-27 19:58:59,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3525, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3596, PETRI_PLACES=282, PETRI_TRANSITIONS=344} [2024-06-27 19:58:59,830 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 238 predicate places. [2024-06-27 19:58:59,830 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 344 transitions, 3596 flow [2024-06-27 19:58:59,830 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 19:58:59,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:59,830 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 19:58:59,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 19:58:59,831 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:59,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:59,831 INFO L85 PathProgramCache]: Analyzing trace with hash 626050778, now seen corresponding path program 6 times [2024-06-27 19:58:59,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:59,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398600219] [2024-06-27 19:58:59,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:59,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:59,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:00,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:59:00,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:00,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398600219] [2024-06-27 19:59:00,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398600219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:00,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:00,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:59:00,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483844324] [2024-06-27 19:59:00,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:00,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:59:00,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:00,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:59:00,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:59:00,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:59:00,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 344 transitions, 3596 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 19:59:00,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:00,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:59:00,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:02,021 INFO L124 PetriNetUnfolderBase]: 3399/5535 cut-off events. [2024-06-27 19:59:02,021 INFO L125 PetriNetUnfolderBase]: For 1003434/1003437 co-relation queries the response was YES. [2024-06-27 19:59:02,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52451 conditions, 5535 events. 3399/5535 cut-off events. For 1003434/1003437 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 34261 event pairs, 758 based on Foata normal form. 3/5534 useless extension candidates. Maximal degree in co-relation 52313. Up to 5014 conditions per place. [2024-06-27 19:59:02,093 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 283 selfloop transitions, 62 changer transitions 0/365 dead transitions. [2024-06-27 19:59:02,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 365 transitions, 4700 flow [2024-06-27 19:59:02,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:59:02,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:59:02,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 19:59:02,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 19:59:02,103 INFO L175 Difference]: Start difference. First operand has 282 places, 344 transitions, 3596 flow. Second operand 8 states and 152 transitions. [2024-06-27 19:59:02,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 365 transitions, 4700 flow [2024-06-27 19:59:03,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 365 transitions, 4644 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 19:59:03,360 INFO L231 Difference]: Finished difference. Result has 284 places, 350 transitions, 3853 flow [2024-06-27 19:59:03,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3540, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3853, PETRI_PLACES=284, PETRI_TRANSITIONS=350} [2024-06-27 19:59:03,360 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 240 predicate places. [2024-06-27 19:59:03,360 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 350 transitions, 3853 flow [2024-06-27 19:59:03,360 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 19:59:03,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:03,361 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 19:59:03,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 19:59:03,361 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:59:03,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:03,361 INFO L85 PathProgramCache]: Analyzing trace with hash 616846351, now seen corresponding path program 4 times [2024-06-27 19:59:03,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:03,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515977598] [2024-06-27 19:59:03,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:03,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:03,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:04,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:59:04,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:04,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515977598] [2024-06-27 19:59:04,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515977598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:04,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:04,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:59:04,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049419981] [2024-06-27 19:59:04,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:04,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:59:04,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:04,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:59:04,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:59:04,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:59:04,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 350 transitions, 3853 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 19:59:04,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:04,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:59:04,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:05,550 INFO L124 PetriNetUnfolderBase]: 3401/5540 cut-off events. [2024-06-27 19:59:05,551 INFO L125 PetriNetUnfolderBase]: For 1016974/1016977 co-relation queries the response was YES. [2024-06-27 19:59:05,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52980 conditions, 5540 events. 3401/5540 cut-off events. For 1016974/1016977 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 34342 event pairs, 766 based on Foata normal form. 2/5538 useless extension candidates. Maximal degree in co-relation 52841. Up to 5064 conditions per place. [2024-06-27 19:59:05,621 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 308 selfloop transitions, 38 changer transitions 0/366 dead transitions. [2024-06-27 19:59:05,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 366 transitions, 4665 flow [2024-06-27 19:59:05,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:59:05,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:59:05,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 19:59:05,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-27 19:59:05,623 INFO L175 Difference]: Start difference. First operand has 284 places, 350 transitions, 3853 flow. Second operand 8 states and 150 transitions. [2024-06-27 19:59:05,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 366 transitions, 4665 flow [2024-06-27 19:59:07,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 366 transitions, 4544 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-27 19:59:07,202 INFO L231 Difference]: Finished difference. Result has 288 places, 353 transitions, 3906 flow [2024-06-27 19:59:07,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3734, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3906, PETRI_PLACES=288, PETRI_TRANSITIONS=353} [2024-06-27 19:59:07,203 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 244 predicate places. [2024-06-27 19:59:07,203 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 353 transitions, 3906 flow [2024-06-27 19:59:07,203 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 19:59:07,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:07,204 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 19:59:07,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 19:59:07,204 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:59:07,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:07,204 INFO L85 PathProgramCache]: Analyzing trace with hash 626389391, now seen corresponding path program 1 times [2024-06-27 19:59:07,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:07,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897582502] [2024-06-27 19:59:07,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:07,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:07,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:08,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:59:08,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:08,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897582502] [2024-06-27 19:59:08,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897582502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:08,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:08,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:59:08,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224815151] [2024-06-27 19:59:08,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:08,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:59:08,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:08,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:59:08,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:59:08,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:59:08,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 353 transitions, 3906 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:08,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:08,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:59:08,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:10,117 INFO L124 PetriNetUnfolderBase]: 3352/5448 cut-off events. [2024-06-27 19:59:10,118 INFO L125 PetriNetUnfolderBase]: For 1023131/1023131 co-relation queries the response was YES. [2024-06-27 19:59:10,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52782 conditions, 5448 events. 3352/5448 cut-off events. For 1023131/1023131 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 33715 event pairs, 748 based on Foata normal form. 2/5399 useless extension candidates. Maximal degree in co-relation 52641. Up to 5020 conditions per place. [2024-06-27 19:59:10,192 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 321 selfloop transitions, 19 changer transitions 0/371 dead transitions. [2024-06-27 19:59:10,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 371 transitions, 4731 flow [2024-06-27 19:59:10,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:59:10,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:59:10,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 19:59:10,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-27 19:59:10,193 INFO L175 Difference]: Start difference. First operand has 288 places, 353 transitions, 3906 flow. Second operand 9 states and 157 transitions. [2024-06-27 19:59:10,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 371 transitions, 4731 flow [2024-06-27 19:59:12,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 371 transitions, 4581 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-27 19:59:12,414 INFO L231 Difference]: Finished difference. Result has 292 places, 358 transitions, 3924 flow [2024-06-27 19:59:12,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3756, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3924, PETRI_PLACES=292, PETRI_TRANSITIONS=358} [2024-06-27 19:59:12,415 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 248 predicate places. [2024-06-27 19:59:12,415 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 358 transitions, 3924 flow [2024-06-27 19:59:12,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:12,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:12,415 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 19:59:12,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 19:59:12,416 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:59:12,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:12,416 INFO L85 PathProgramCache]: Analyzing trace with hash -640614255, now seen corresponding path program 1 times [2024-06-27 19:59:12,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:12,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192376829] [2024-06-27 19:59:12,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:12,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:12,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:13,153 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 19:59:13,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:13,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192376829] [2024-06-27 19:59:13,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192376829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:13,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:13,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:59:13,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595634399] [2024-06-27 19:59:13,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:13,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:59:13,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:13,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:59:13,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:59:13,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:59:13,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 358 transitions, 3924 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 19:59:13,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:13,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:59:13,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:14,570 INFO L124 PetriNetUnfolderBase]: 3369/5474 cut-off events. [2024-06-27 19:59:14,570 INFO L125 PetriNetUnfolderBase]: For 1054725/1054728 co-relation queries the response was YES. [2024-06-27 19:59:14,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53366 conditions, 5474 events. 3369/5474 cut-off events. For 1054725/1054728 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 33889 event pairs, 578 based on Foata normal form. 6/5448 useless extension candidates. Maximal degree in co-relation 53223. Up to 4918 conditions per place. [2024-06-27 19:59:14,639 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 332 selfloop transitions, 26 changer transitions 0/389 dead transitions. [2024-06-27 19:59:14,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 389 transitions, 4818 flow [2024-06-27 19:59:14,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:59:14,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:59:14,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-27 19:59:14,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738372093023256 [2024-06-27 19:59:14,641 INFO L175 Difference]: Start difference. First operand has 292 places, 358 transitions, 3924 flow. Second operand 8 states and 163 transitions. [2024-06-27 19:59:14,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 389 transitions, 4818 flow [2024-06-27 19:59:16,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 389 transitions, 4691 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-27 19:59:16,519 INFO L231 Difference]: Finished difference. Result has 294 places, 361 transitions, 3969 flow [2024-06-27 19:59:16,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3797, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3969, PETRI_PLACES=294, PETRI_TRANSITIONS=361} [2024-06-27 19:59:16,520 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 250 predicate places. [2024-06-27 19:59:16,520 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 361 transitions, 3969 flow [2024-06-27 19:59:16,520 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 19:59:16,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:16,520 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 19:59:16,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 19:59:16,520 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:59:16,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:16,521 INFO L85 PathProgramCache]: Analyzing trace with hash 139899257, now seen corresponding path program 2 times [2024-06-27 19:59:16,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:16,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036705833] [2024-06-27 19:59:16,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:16,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:16,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:17,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:59:17,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:17,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036705833] [2024-06-27 19:59:17,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036705833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:17,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:17,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:59:17,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331980024] [2024-06-27 19:59:17,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:17,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:59:17,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:17,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:59:17,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:59:17,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:59:17,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 361 transitions, 3969 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 19:59:17,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:17,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:59:17,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:18,898 INFO L124 PetriNetUnfolderBase]: 3385/5498 cut-off events. [2024-06-27 19:59:18,898 INFO L125 PetriNetUnfolderBase]: For 1075420/1075423 co-relation queries the response was YES. [2024-06-27 19:59:18,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54025 conditions, 5498 events. 3385/5498 cut-off events. For 1075420/1075423 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 34098 event pairs, 750 based on Foata normal form. 6/5452 useless extension candidates. Maximal degree in co-relation 53881. Up to 4988 conditions per place. [2024-06-27 19:59:18,971 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 330 selfloop transitions, 27 changer transitions 0/388 dead transitions. [2024-06-27 19:59:18,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 388 transitions, 4857 flow [2024-06-27 19:59:18,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:59:18,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:59:18,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 19:59:18,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 19:59:18,973 INFO L175 Difference]: Start difference. First operand has 294 places, 361 transitions, 3969 flow. Second operand 8 states and 160 transitions. [2024-06-27 19:59:18,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 388 transitions, 4857 flow [2024-06-27 19:59:21,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 388 transitions, 4707 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-27 19:59:21,338 INFO L231 Difference]: Finished difference. Result has 296 places, 364 transitions, 3999 flow [2024-06-27 19:59:21,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3819, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3999, PETRI_PLACES=296, PETRI_TRANSITIONS=364} [2024-06-27 19:59:21,339 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 252 predicate places. [2024-06-27 19:59:21,339 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 364 transitions, 3999 flow [2024-06-27 19:59:21,339 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 19:59:21,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:21,339 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 19:59:21,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 19:59:21,339 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:59:21,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:21,340 INFO L85 PathProgramCache]: Analyzing trace with hash -192555407, now seen corresponding path program 1 times [2024-06-27 19:59:21,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:21,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045005067] [2024-06-27 19:59:21,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:21,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:21,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:22,272 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 19:59:22,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:22,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045005067] [2024-06-27 19:59:22,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045005067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:22,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:22,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:59:22,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532259388] [2024-06-27 19:59:22,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:22,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:59:22,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:22,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:59:22,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:59:22,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:59:22,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 364 transitions, 3999 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:22,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:22,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:59:22,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:23,592 INFO L124 PetriNetUnfolderBase]: 3405/5526 cut-off events. [2024-06-27 19:59:23,592 INFO L125 PetriNetUnfolderBase]: For 1098189/1098192 co-relation queries the response was YES. [2024-06-27 19:59:23,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54516 conditions, 5526 events. 3405/5526 cut-off events. For 1098189/1098192 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 34331 event pairs, 749 based on Foata normal form. 6/5480 useless extension candidates. Maximal degree in co-relation 54371. Up to 5010 conditions per place. [2024-06-27 19:59:23,790 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 330 selfloop transitions, 32 changer transitions 0/393 dead transitions. [2024-06-27 19:59:23,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 393 transitions, 4917 flow [2024-06-27 19:59:23,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:59:23,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:59:23,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-27 19:59:23,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-27 19:59:23,791 INFO L175 Difference]: Start difference. First operand has 296 places, 364 transitions, 3999 flow. Second operand 9 states and 177 transitions. [2024-06-27 19:59:23,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 393 transitions, 4917 flow [2024-06-27 19:59:25,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 393 transitions, 4759 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-27 19:59:25,949 INFO L231 Difference]: Finished difference. Result has 299 places, 368 transitions, 4046 flow [2024-06-27 19:59:25,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3841, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4046, PETRI_PLACES=299, PETRI_TRANSITIONS=368} [2024-06-27 19:59:25,950 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 255 predicate places. [2024-06-27 19:59:25,950 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 368 transitions, 4046 flow [2024-06-27 19:59:25,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:25,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:25,950 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 19:59:25,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 19:59:25,950 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:59:25,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:25,951 INFO L85 PathProgramCache]: Analyzing trace with hash 143360159, now seen corresponding path program 1 times [2024-06-27 19:59:25,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:25,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681691178] [2024-06-27 19:59:25,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:25,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:25,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:26,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:59:26,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:26,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681691178] [2024-06-27 19:59:26,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681691178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:26,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:26,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:59:26,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991707219] [2024-06-27 19:59:26,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:26,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:59:26,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:26,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:59:26,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:59:26,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:59:26,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 368 transitions, 4046 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 19:59:26,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:26,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:59:26,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:27,985 INFO L124 PetriNetUnfolderBase]: 3571/5736 cut-off events. [2024-06-27 19:59:27,985 INFO L125 PetriNetUnfolderBase]: For 1108076/1108079 co-relation queries the response was YES. [2024-06-27 19:59:28,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56003 conditions, 5736 events. 3571/5736 cut-off events. For 1108076/1108079 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 35071 event pairs, 786 based on Foata normal form. 2/5734 useless extension candidates. Maximal degree in co-relation 55857. Up to 5321 conditions per place. [2024-06-27 19:59:28,065 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 350 selfloop transitions, 40 changer transitions 0/395 dead transitions. [2024-06-27 19:59:28,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 395 transitions, 5002 flow [2024-06-27 19:59:28,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:59:28,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:59:28,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 19:59:28,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-27 19:59:28,068 INFO L175 Difference]: Start difference. First operand has 299 places, 368 transitions, 4046 flow. Second operand 8 states and 155 transitions. [2024-06-27 19:59:28,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 395 transitions, 5002 flow [2024-06-27 19:59:30,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 395 transitions, 4825 flow, removed 59 selfloop flow, removed 7 redundant places. [2024-06-27 19:59:30,563 INFO L231 Difference]: Finished difference. Result has 300 places, 372 transitions, 4082 flow [2024-06-27 19:59:30,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3869, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4082, PETRI_PLACES=300, PETRI_TRANSITIONS=372} [2024-06-27 19:59:30,563 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 256 predicate places. [2024-06-27 19:59:30,563 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 372 transitions, 4082 flow [2024-06-27 19:59:30,564 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 19:59:30,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:30,564 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 19:59:30,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 19:59:30,564 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 19:59:30,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:30,564 INFO L85 PathProgramCache]: Analyzing trace with hash -522104913, now seen corresponding path program 2 times [2024-06-27 19:59:30,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:30,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779328702] [2024-06-27 19:59:30,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:30,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:30,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:31,292 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 19:59:31,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:31,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779328702] [2024-06-27 19:59:31,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779328702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:31,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:31,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:59:31,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764730598] [2024-06-27 19:59:31,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:31,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:59:31,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:31,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:59:31,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:59:31,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:59:31,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 372 transitions, 4082 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 19:59:31,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:31,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:59:31,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:32,637 INFO L124 PetriNetUnfolderBase]: 3581/5740 cut-off events. [2024-06-27 19:59:32,637 INFO L125 PetriNetUnfolderBase]: For 1130429/1130432 co-relation queries the response was YES. [2024-06-27 19:59:32,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56659 conditions, 5740 events. 3581/5740 cut-off events. For 1130429/1130432 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 34980 event pairs, 786 based on Foata normal form. 2/5738 useless extension candidates. Maximal degree in co-relation 56512. Up to 5323 conditions per place. [2024-06-27 19:59:32,721 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 344 selfloop transitions, 47 changer transitions 0/396 dead transitions. [2024-06-27 19:59:32,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 396 transitions, 5040 flow [2024-06-27 19:59:32,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:59:32,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:59:32,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 19:59:32,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-27 19:59:32,723 INFO L175 Difference]: Start difference. First operand has 300 places, 372 transitions, 4082 flow. Second operand 8 states and 154 transitions. [2024-06-27 19:59:32,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 396 transitions, 5040 flow [2024-06-27 19:59:35,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 396 transitions, 4855 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-27 19:59:35,273 INFO L231 Difference]: Finished difference. Result has 302 places, 376 transitions, 4132 flow [2024-06-27 19:59:35,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3897, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4132, PETRI_PLACES=302, PETRI_TRANSITIONS=376} [2024-06-27 19:59:35,273 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 258 predicate places. [2024-06-27 19:59:35,273 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 376 transitions, 4132 flow [2024-06-27 19:59:35,273 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 19:59:35,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:35,274 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 19:59:35,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 19:59:35,274 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 19:59:35,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:35,274 INFO L85 PathProgramCache]: Analyzing trace with hash -522104665, now seen corresponding path program 1 times [2024-06-27 19:59:35,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:35,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776949660] [2024-06-27 19:59:35,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:35,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:35,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:36,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:59:36,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:36,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776949660] [2024-06-27 19:59:36,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776949660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:36,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:36,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:59:36,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578930467] [2024-06-27 19:59:36,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:36,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:59:36,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:36,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:59:36,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:59:36,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:59:36,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 376 transitions, 4132 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 19:59:36,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:36,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:59:36,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:37,562 INFO L124 PetriNetUnfolderBase]: 3435/5568 cut-off events. [2024-06-27 19:59:37,562 INFO L125 PetriNetUnfolderBase]: For 1154630/1154633 co-relation queries the response was YES. [2024-06-27 19:59:37,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56414 conditions, 5568 events. 3435/5568 cut-off events. For 1154630/1154633 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 34592 event pairs, 745 based on Foata normal form. 4/5520 useless extension candidates. Maximal degree in co-relation 56266. Up to 5056 conditions per place. [2024-06-27 19:59:37,639 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 340 selfloop transitions, 27 changer transitions 0/400 dead transitions. [2024-06-27 19:59:37,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 400 transitions, 4994 flow [2024-06-27 19:59:37,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:59:37,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:59:37,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-27 19:59:37,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-27 19:59:37,640 INFO L175 Difference]: Start difference. First operand has 302 places, 376 transitions, 4132 flow. Second operand 8 states and 157 transitions. [2024-06-27 19:59:37,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 400 transitions, 4994 flow [2024-06-27 19:59:40,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 400 transitions, 4787 flow, removed 59 selfloop flow, removed 6 redundant places. [2024-06-27 19:59:40,409 INFO L231 Difference]: Finished difference. Result has 304 places, 380 transitions, 4072 flow [2024-06-27 19:59:40,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3925, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4072, PETRI_PLACES=304, PETRI_TRANSITIONS=380} [2024-06-27 19:59:40,410 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 260 predicate places. [2024-06-27 19:59:40,410 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 380 transitions, 4072 flow [2024-06-27 19:59:40,410 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 19:59:40,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:40,410 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 19:59:40,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 19:59:40,410 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 19:59:40,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:40,411 INFO L85 PathProgramCache]: Analyzing trace with hash 151937797, now seen corresponding path program 2 times [2024-06-27 19:59:40,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:40,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052017780] [2024-06-27 19:59:40,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:40,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:40,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:41,260 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 19:59:41,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:41,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052017780] [2024-06-27 19:59:41,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052017780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:41,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:41,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:59:41,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775082648] [2024-06-27 19:59:41,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:41,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:59:41,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:41,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:59:41,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:59:41,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:59:41,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 380 transitions, 4072 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 19:59:41,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:41,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:59:41,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:42,507 INFO L124 PetriNetUnfolderBase]: 3445/5572 cut-off events. [2024-06-27 19:59:42,507 INFO L125 PetriNetUnfolderBase]: For 1174294/1174297 co-relation queries the response was YES. [2024-06-27 19:59:42,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56555 conditions, 5572 events. 3445/5572 cut-off events. For 1174294/1174297 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 34475 event pairs, 745 based on Foata normal form. 4/5524 useless extension candidates. Maximal degree in co-relation 56406. Up to 4994 conditions per place. [2024-06-27 19:59:42,585 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 314 selfloop transitions, 55 changer transitions 0/402 dead transitions. [2024-06-27 19:59:42,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 402 transitions, 5150 flow [2024-06-27 19:59:42,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:59:42,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:59:42,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-27 19:59:42,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-27 19:59:42,587 INFO L175 Difference]: Start difference. First operand has 304 places, 380 transitions, 4072 flow. Second operand 8 states and 157 transitions. [2024-06-27 19:59:42,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 402 transitions, 5150 flow [2024-06-27 19:59:45,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 402 transitions, 5053 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 19:59:45,136 INFO L231 Difference]: Finished difference. Result has 306 places, 384 transitions, 4183 flow [2024-06-27 19:59:45,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3975, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4183, PETRI_PLACES=306, PETRI_TRANSITIONS=384} [2024-06-27 19:59:45,136 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 262 predicate places. [2024-06-27 19:59:45,136 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 384 transitions, 4183 flow [2024-06-27 19:59:45,137 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 19:59:45,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:45,137 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 19:59:45,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 19:59:45,137 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 19:59:45,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:45,138 INFO L85 PathProgramCache]: Analyzing trace with hash -285929305, now seen corresponding path program 3 times [2024-06-27 19:59:45,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:45,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434853540] [2024-06-27 19:59:45,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:45,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:45,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:46,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:59:46,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:46,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434853540] [2024-06-27 19:59:46,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434853540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:46,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:46,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:59:46,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561439184] [2024-06-27 19:59:46,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:46,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:59:46,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:46,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:59:46,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:59:46,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:59:46,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 384 transitions, 4183 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 19:59:46,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:46,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:59:46,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:47,713 INFO L124 PetriNetUnfolderBase]: 3447/5585 cut-off events. [2024-06-27 19:59:47,713 INFO L125 PetriNetUnfolderBase]: For 1190713/1190716 co-relation queries the response was YES. [2024-06-27 19:59:47,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56743 conditions, 5585 events. 3447/5585 cut-off events. For 1190713/1190716 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 34638 event pairs, 745 based on Foata normal form. 4/5537 useless extension candidates. Maximal degree in co-relation 56593. Up to 5043 conditions per place. [2024-06-27 19:59:47,791 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 332 selfloop transitions, 39 changer transitions 0/404 dead transitions. [2024-06-27 19:59:47,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 404 transitions, 5043 flow [2024-06-27 19:59:47,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:59:47,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:59:47,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 19:59:47,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-27 19:59:47,792 INFO L175 Difference]: Start difference. First operand has 306 places, 384 transitions, 4183 flow. Second operand 8 states and 155 transitions. [2024-06-27 19:59:47,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 404 transitions, 5043 flow [2024-06-27 19:59:50,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 404 transitions, 4910 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-27 19:59:50,575 INFO L231 Difference]: Finished difference. Result has 309 places, 387 transitions, 4217 flow [2024-06-27 19:59:50,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4052, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4217, PETRI_PLACES=309, PETRI_TRANSITIONS=387} [2024-06-27 19:59:50,576 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 265 predicate places. [2024-06-27 19:59:50,576 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 387 transitions, 4217 flow [2024-06-27 19:59:50,576 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 19:59:50,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:50,576 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 19:59:50,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 19:59:50,577 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 19:59:50,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:50,577 INFO L85 PathProgramCache]: Analyzing trace with hash -285929553, now seen corresponding path program 3 times [2024-06-27 19:59:50,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:50,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169112591] [2024-06-27 19:59:50,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:50,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:50,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:51,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:59:51,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:51,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169112591] [2024-06-27 19:59:51,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169112591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:51,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:51,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:59:51,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448812198] [2024-06-27 19:59:51,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:51,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:59:51,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:51,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:59:51,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:59:51,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:59:51,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 387 transitions, 4217 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 19:59:51,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:51,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:59:51,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:52,817 INFO L124 PetriNetUnfolderBase]: 3629/5819 cut-off events. [2024-06-27 19:59:52,817 INFO L125 PetriNetUnfolderBase]: For 1225647/1225650 co-relation queries the response was YES. [2024-06-27 19:59:52,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58559 conditions, 5819 events. 3629/5819 cut-off events. For 1225647/1225650 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 35542 event pairs, 785 based on Foata normal form. 2/5817 useless extension candidates. Maximal degree in co-relation 58408. Up to 5325 conditions per place. [2024-06-27 19:59:52,897 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 349 selfloop transitions, 59 changer transitions 0/413 dead transitions. [2024-06-27 19:59:52,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 413 transitions, 5559 flow [2024-06-27 19:59:52,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:59:52,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:59:52,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 19:59:52,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 19:59:52,899 INFO L175 Difference]: Start difference. First operand has 309 places, 387 transitions, 4217 flow. Second operand 8 states and 152 transitions. [2024-06-27 19:59:52,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 413 transitions, 5559 flow [2024-06-27 19:59:55,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 413 transitions, 5428 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-27 19:59:55,986 INFO L231 Difference]: Finished difference. Result has 311 places, 394 transitions, 4441 flow [2024-06-27 19:59:55,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4086, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4441, PETRI_PLACES=311, PETRI_TRANSITIONS=394} [2024-06-27 19:59:55,987 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 267 predicate places. [2024-06-27 19:59:55,987 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 394 transitions, 4441 flow [2024-06-27 19:59:55,987 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 19:59:55,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:55,987 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 19:59:55,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 19:59:55,988 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 19:59:55,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:55,988 INFO L85 PathProgramCache]: Analyzing trace with hash -738906506, now seen corresponding path program 1 times [2024-06-27 19:59:55,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:55,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606824928] [2024-06-27 19:59:55,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:55,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:55,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:56,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:59:56,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:56,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606824928] [2024-06-27 19:59:56,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606824928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:56,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:56,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:59:56,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490059286] [2024-06-27 19:59:56,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:56,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:59:56,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:56,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:59:56,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:59:57,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:59:57,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 394 transitions, 4441 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:57,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:57,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:59:57,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:58,666 INFO L124 PetriNetUnfolderBase]: 3793/6133 cut-off events. [2024-06-27 19:59:58,666 INFO L125 PetriNetUnfolderBase]: For 1288271/1288274 co-relation queries the response was YES. [2024-06-27 19:59:58,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60683 conditions, 6133 events. 3793/6133 cut-off events. For 1288271/1288274 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 38349 event pairs, 804 based on Foata normal form. 12/6141 useless extension candidates. Maximal degree in co-relation 60531. Up to 4954 conditions per place. [2024-06-27 19:59:58,748 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 355 selfloop transitions, 87 changer transitions 0/447 dead transitions. [2024-06-27 19:59:58,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 447 transitions, 5629 flow [2024-06-27 19:59:58,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:59:58,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:59:58,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 201 transitions. [2024-06-27 19:59:58,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46744186046511627 [2024-06-27 19:59:58,750 INFO L175 Difference]: Start difference. First operand has 311 places, 394 transitions, 4441 flow. Second operand 10 states and 201 transitions. [2024-06-27 19:59:58,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 447 transitions, 5629 flow [2024-06-27 20:00:01,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 447 transitions, 5447 flow, removed 70 selfloop flow, removed 4 redundant places. [2024-06-27 20:00:01,400 INFO L231 Difference]: Finished difference. Result has 319 places, 405 transitions, 4622 flow [2024-06-27 20:00:01,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4259, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4622, PETRI_PLACES=319, PETRI_TRANSITIONS=405} [2024-06-27 20:00:01,401 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 275 predicate places. [2024-06-27 20:00:01,401 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 405 transitions, 4622 flow [2024-06-27 20:00:01,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:01,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:01,402 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 20:00:01,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 20:00:01,402 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:00:01,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:01,402 INFO L85 PathProgramCache]: Analyzing trace with hash -286052685, now seen corresponding path program 3 times [2024-06-27 20:00:01,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:01,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725158376] [2024-06-27 20:00:01,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:01,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:01,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:02,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:02,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:02,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725158376] [2024-06-27 20:00:02,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725158376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:02,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:02,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:00:02,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275137238] [2024-06-27 20:00:02,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:02,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:00:02,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:02,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:00:02,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:00:02,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:00:02,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 405 transitions, 4622 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 20:00:02,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:02,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:00:02,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:03,751 INFO L124 PetriNetUnfolderBase]: 3653/5971 cut-off events. [2024-06-27 20:00:03,751 INFO L125 PetriNetUnfolderBase]: For 1293129/1293132 co-relation queries the response was YES. [2024-06-27 20:00:03,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61002 conditions, 5971 events. 3653/5971 cut-off events. For 1293129/1293132 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 38037 event pairs, 786 based on Foata normal form. 6/5925 useless extension candidates. Maximal degree in co-relation 60846. Up to 5371 conditions per place. [2024-06-27 20:00:03,829 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 352 selfloop transitions, 39 changer transitions 0/426 dead transitions. [2024-06-27 20:00:03,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 426 transitions, 5578 flow [2024-06-27 20:00:03,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:00:03,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:00:03,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 20:00:03,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-27 20:00:03,831 INFO L175 Difference]: Start difference. First operand has 319 places, 405 transitions, 4622 flow. Second operand 8 states and 155 transitions. [2024-06-27 20:00:03,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 426 transitions, 5578 flow [2024-06-27 20:00:06,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 426 transitions, 5404 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-27 20:00:06,110 INFO L231 Difference]: Finished difference. Result has 319 places, 408 transitions, 4668 flow [2024-06-27 20:00:06,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4448, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4668, PETRI_PLACES=319, PETRI_TRANSITIONS=408} [2024-06-27 20:00:06,110 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 275 predicate places. [2024-06-27 20:00:06,111 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 408 transitions, 4668 flow [2024-06-27 20:00:06,111 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 20:00:06,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:06,111 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 20:00:06,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 20:00:06,111 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:00:06,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:06,111 INFO L85 PathProgramCache]: Analyzing trace with hash -286039789, now seen corresponding path program 2 times [2024-06-27 20:00:06,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:06,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065291968] [2024-06-27 20:00:06,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:06,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:06,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:07,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:07,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:07,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065291968] [2024-06-27 20:00:07,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065291968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:07,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:07,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:00:07,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734674229] [2024-06-27 20:00:07,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:07,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:00:07,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:07,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:00:07,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:00:07,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:00:07,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 408 transitions, 4668 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:07,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:07,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:00:07,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:08,816 INFO L124 PetriNetUnfolderBase]: 3673/6001 cut-off events. [2024-06-27 20:00:08,816 INFO L125 PetriNetUnfolderBase]: For 1316582/1316585 co-relation queries the response was YES. [2024-06-27 20:00:08,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61362 conditions, 6001 events. 3673/6001 cut-off events. For 1316582/1316585 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 38276 event pairs, 788 based on Foata normal form. 6/5955 useless extension candidates. Maximal degree in co-relation 61208. Up to 5393 conditions per place. [2024-06-27 20:00:08,889 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 352 selfloop transitions, 44 changer transitions 0/431 dead transitions. [2024-06-27 20:00:08,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 431 transitions, 5656 flow [2024-06-27 20:00:08,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:00:08,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:00:08,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-27 20:00:08,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 20:00:08,891 INFO L175 Difference]: Start difference. First operand has 319 places, 408 transitions, 4668 flow. Second operand 9 states and 172 transitions. [2024-06-27 20:00:08,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 431 transitions, 5656 flow [2024-06-27 20:00:12,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 431 transitions, 5458 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-27 20:00:12,221 INFO L231 Difference]: Finished difference. Result has 322 places, 412 transitions, 4717 flow [2024-06-27 20:00:12,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4470, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4717, PETRI_PLACES=322, PETRI_TRANSITIONS=412} [2024-06-27 20:00:12,222 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 278 predicate places. [2024-06-27 20:00:12,222 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 412 transitions, 4717 flow [2024-06-27 20:00:12,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:12,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:12,222 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 20:00:12,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 20:00:12,223 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:00:12,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:12,223 INFO L85 PathProgramCache]: Analyzing trace with hash -285622219, now seen corresponding path program 3 times [2024-06-27 20:00:12,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:12,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172301919] [2024-06-27 20:00:12,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:12,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:12,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:13,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:13,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:13,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172301919] [2024-06-27 20:00:13,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172301919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:13,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:13,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:00:13,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274853880] [2024-06-27 20:00:13,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:13,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:00:13,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:13,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:00:13,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:00:13,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:00:13,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 412 transitions, 4717 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:13,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:13,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:00:13,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:14,872 INFO L124 PetriNetUnfolderBase]: 3713/6060 cut-off events. [2024-06-27 20:00:14,873 INFO L125 PetriNetUnfolderBase]: For 1339220/1339223 co-relation queries the response was YES. [2024-06-27 20:00:14,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62775 conditions, 6060 events. 3713/6060 cut-off events. For 1339220/1339223 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 38563 event pairs, 780 based on Foata normal form. 4/6012 useless extension candidates. Maximal degree in co-relation 62620. Up to 5348 conditions per place. [2024-06-27 20:00:14,958 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 349 selfloop transitions, 65 changer transitions 0/449 dead transitions. [2024-06-27 20:00:14,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 449 transitions, 6502 flow [2024-06-27 20:00:14,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:00:14,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:00:14,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-27 20:00:14,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-27 20:00:14,960 INFO L175 Difference]: Start difference. First operand has 322 places, 412 transitions, 4717 flow. Second operand 9 states and 175 transitions. [2024-06-27 20:00:14,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 449 transitions, 6502 flow [2024-06-27 20:00:18,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 449 transitions, 6166 flow, removed 125 selfloop flow, removed 7 redundant places. [2024-06-27 20:00:18,845 INFO L231 Difference]: Finished difference. Result has 325 places, 425 transitions, 4950 flow [2024-06-27 20:00:18,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4498, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4950, PETRI_PLACES=325, PETRI_TRANSITIONS=425} [2024-06-27 20:00:18,845 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 281 predicate places. [2024-06-27 20:00:18,845 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 425 transitions, 4950 flow [2024-06-27 20:00:18,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:18,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:18,846 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 20:00:18,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 20:00:18,846 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:00:18,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:18,847 INFO L85 PathProgramCache]: Analyzing trace with hash -285636169, now seen corresponding path program 4 times [2024-06-27 20:00:18,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:18,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397168263] [2024-06-27 20:00:18,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:18,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:18,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:19,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:19,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:19,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397168263] [2024-06-27 20:00:19,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397168263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:19,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:19,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:00:19,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388053897] [2024-06-27 20:00:19,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:19,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:00:19,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:19,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:00:19,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:00:20,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:00:20,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 425 transitions, 4950 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:20,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:20,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:00:20,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:21,450 INFO L124 PetriNetUnfolderBase]: 3757/6130 cut-off events. [2024-06-27 20:00:21,450 INFO L125 PetriNetUnfolderBase]: For 1408625/1408628 co-relation queries the response was YES. [2024-06-27 20:00:21,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64745 conditions, 6130 events. 3757/6130 cut-off events. For 1408625/1408628 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 39130 event pairs, 786 based on Foata normal form. 6/6084 useless extension candidates. Maximal degree in co-relation 64588. Up to 5359 conditions per place. [2024-06-27 20:00:21,542 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 341 selfloop transitions, 84 changer transitions 0/460 dead transitions. [2024-06-27 20:00:21,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 460 transitions, 6841 flow [2024-06-27 20:00:21,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:00:21,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:00:21,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-27 20:00:21,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625322997416021 [2024-06-27 20:00:21,543 INFO L175 Difference]: Start difference. First operand has 325 places, 425 transitions, 4950 flow. Second operand 9 states and 179 transitions. [2024-06-27 20:00:21,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 460 transitions, 6841 flow [2024-06-27 20:00:25,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 460 transitions, 6590 flow, removed 93 selfloop flow, removed 5 redundant places. [2024-06-27 20:00:25,169 INFO L231 Difference]: Finished difference. Result has 330 places, 439 transitions, 5470 flow [2024-06-27 20:00:25,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4723, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5470, PETRI_PLACES=330, PETRI_TRANSITIONS=439} [2024-06-27 20:00:25,170 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 286 predicate places. [2024-06-27 20:00:25,170 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 439 transitions, 5470 flow [2024-06-27 20:00:25,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:25,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:25,170 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 20:00:25,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 20:00:25,171 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:00:25,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:25,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1785177643, now seen corresponding path program 4 times [2024-06-27 20:00:25,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:25,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964530622] [2024-06-27 20:00:25,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:25,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:25,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:25,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:25,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:25,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964530622] [2024-06-27 20:00:25,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964530622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:25,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:25,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:00:25,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417116849] [2024-06-27 20:00:25,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:25,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:00:25,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:25,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:00:25,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:00:25,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:00:25,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 439 transitions, 5470 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 20:00:25,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:25,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:00:25,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:27,561 INFO L124 PetriNetUnfolderBase]: 3918/6320 cut-off events. [2024-06-27 20:00:27,561 INFO L125 PetriNetUnfolderBase]: For 1422327/1422330 co-relation queries the response was YES. [2024-06-27 20:00:27,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66653 conditions, 6320 events. 3918/6320 cut-off events. For 1422327/1422330 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 39719 event pairs, 850 based on Foata normal form. 1/6308 useless extension candidates. Maximal degree in co-relation 66493. Up to 5865 conditions per place. [2024-06-27 20:00:27,662 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 414 selfloop transitions, 43 changer transitions 0/462 dead transitions. [2024-06-27 20:00:27,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 462 transitions, 6546 flow [2024-06-27 20:00:27,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:00:27,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:00:27,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 20:00:27,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 20:00:27,664 INFO L175 Difference]: Start difference. First operand has 330 places, 439 transitions, 5470 flow. Second operand 8 states and 152 transitions. [2024-06-27 20:00:27,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 462 transitions, 6546 flow [2024-06-27 20:00:31,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 462 transitions, 6268 flow, removed 120 selfloop flow, removed 4 redundant places. [2024-06-27 20:00:31,509 INFO L231 Difference]: Finished difference. Result has 334 places, 442 transitions, 5402 flow [2024-06-27 20:00:31,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5194, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5402, PETRI_PLACES=334, PETRI_TRANSITIONS=442} [2024-06-27 20:00:31,510 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 290 predicate places. [2024-06-27 20:00:31,510 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 442 transitions, 5402 flow [2024-06-27 20:00:31,510 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 20:00:31,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:31,510 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 20:00:31,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 20:00:31,511 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:00:31,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:31,511 INFO L85 PathProgramCache]: Analyzing trace with hash 87569083, now seen corresponding path program 5 times [2024-06-27 20:00:31,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:31,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248294207] [2024-06-27 20:00:31,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:31,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:31,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:32,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:32,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:32,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248294207] [2024-06-27 20:00:32,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248294207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:32,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:32,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:00:32,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448924472] [2024-06-27 20:00:32,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:32,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:00:32,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:32,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:00:32,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:00:32,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:00:32,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 442 transitions, 5402 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 20:00:32,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:32,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:00:32,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:33,903 INFO L124 PetriNetUnfolderBase]: 3931/6328 cut-off events. [2024-06-27 20:00:33,904 INFO L125 PetriNetUnfolderBase]: For 1448702/1448705 co-relation queries the response was YES. [2024-06-27 20:00:33,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66982 conditions, 6328 events. 3931/6328 cut-off events. For 1448702/1448705 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 39669 event pairs, 849 based on Foata normal form. 1/6316 useless extension candidates. Maximal degree in co-relation 66820. Up to 5867 conditions per place. [2024-06-27 20:00:34,000 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 406 selfloop transitions, 55 changer transitions 0/466 dead transitions. [2024-06-27 20:00:34,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 466 transitions, 6834 flow [2024-06-27 20:00:34,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:00:34,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:00:34,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 20:00:34,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 20:00:34,002 INFO L175 Difference]: Start difference. First operand has 334 places, 442 transitions, 5402 flow. Second operand 8 states and 152 transitions. [2024-06-27 20:00:34,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 466 transitions, 6834 flow [2024-06-27 20:00:37,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 466 transitions, 6650 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-27 20:00:37,725 INFO L231 Difference]: Finished difference. Result has 337 places, 448 transitions, 5599 flow [2024-06-27 20:00:37,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5218, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5599, PETRI_PLACES=337, PETRI_TRANSITIONS=448} [2024-06-27 20:00:37,726 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 293 predicate places. [2024-06-27 20:00:37,726 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 448 transitions, 5599 flow [2024-06-27 20:00:37,726 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 20:00:37,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:37,726 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 20:00:37,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 20:00:37,727 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:00:37,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:37,727 INFO L85 PathProgramCache]: Analyzing trace with hash -2097585523, now seen corresponding path program 6 times [2024-06-27 20:00:37,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:37,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158237729] [2024-06-27 20:00:37,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:37,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:37,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:38,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:38,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:38,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158237729] [2024-06-27 20:00:38,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158237729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:38,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:38,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:00:38,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397771776] [2024-06-27 20:00:38,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:38,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:00:38,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:38,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:00:38,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:00:38,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:00:38,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 448 transitions, 5599 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 20:00:38,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:38,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:00:38,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:40,012 INFO L124 PetriNetUnfolderBase]: 3928/6334 cut-off events. [2024-06-27 20:00:40,012 INFO L125 PetriNetUnfolderBase]: For 1466648/1466651 co-relation queries the response was YES. [2024-06-27 20:00:40,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67271 conditions, 6334 events. 3928/6334 cut-off events. For 1466648/1466651 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 39799 event pairs, 849 based on Foata normal form. 1/6322 useless extension candidates. Maximal degree in co-relation 67107. Up to 5879 conditions per place. [2024-06-27 20:00:40,113 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 421 selfloop transitions, 42 changer transitions 0/468 dead transitions. [2024-06-27 20:00:40,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 468 transitions, 6575 flow [2024-06-27 20:00:40,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:00:40,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:00:40,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 20:00:40,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 20:00:40,115 INFO L175 Difference]: Start difference. First operand has 337 places, 448 transitions, 5599 flow. Second operand 8 states and 152 transitions. [2024-06-27 20:00:40,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 468 transitions, 6575 flow [2024-06-27 20:00:43,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 468 transitions, 6318 flow, removed 103 selfloop flow, removed 4 redundant places. [2024-06-27 20:00:43,976 INFO L231 Difference]: Finished difference. Result has 341 places, 448 transitions, 5432 flow [2024-06-27 20:00:43,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5342, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5432, PETRI_PLACES=341, PETRI_TRANSITIONS=448} [2024-06-27 20:00:43,977 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 297 predicate places. [2024-06-27 20:00:43,977 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 448 transitions, 5432 flow [2024-06-27 20:00:43,977 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 20:00:43,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:43,977 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 20:00:43,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 20:00:43,978 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:00:43,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:43,978 INFO L85 PathProgramCache]: Analyzing trace with hash -2097406033, now seen corresponding path program 7 times [2024-06-27 20:00:43,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:43,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084494517] [2024-06-27 20:00:43,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:43,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:43,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:44,645 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 20:00:44,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:44,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084494517] [2024-06-27 20:00:44,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084494517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:44,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:44,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:00:44,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493756056] [2024-06-27 20:00:44,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:44,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:00:44,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:44,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:00:44,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:00:44,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:00:44,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 448 transitions, 5432 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 20:00:44,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:44,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:00:44,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:46,222 INFO L124 PetriNetUnfolderBase]: 3925/6320 cut-off events. [2024-06-27 20:00:46,222 INFO L125 PetriNetUnfolderBase]: For 1483522/1483525 co-relation queries the response was YES. [2024-06-27 20:00:46,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67204 conditions, 6320 events. 3925/6320 cut-off events. For 1483522/1483525 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 39667 event pairs, 849 based on Foata normal form. 1/6308 useless extension candidates. Maximal degree in co-relation 67038. Up to 5866 conditions per place. [2024-06-27 20:00:46,309 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 413 selfloop transitions, 50 changer transitions 0/468 dead transitions. [2024-06-27 20:00:46,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 468 transitions, 6522 flow [2024-06-27 20:00:46,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:00:46,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:00:46,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:00:46,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-27 20:00:46,311 INFO L175 Difference]: Start difference. First operand has 341 places, 448 transitions, 5432 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:00:46,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 468 transitions, 6522 flow [2024-06-27 20:00:50,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 468 transitions, 6409 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 20:00:50,174 INFO L231 Difference]: Finished difference. Result has 342 places, 451 transitions, 5553 flow [2024-06-27 20:00:50,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5319, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5553, PETRI_PLACES=342, PETRI_TRANSITIONS=451} [2024-06-27 20:00:50,175 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 298 predicate places. [2024-06-27 20:00:50,175 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 451 transitions, 5553 flow [2024-06-27 20:00:50,175 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 20:00:50,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:50,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:50,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 20:00:50,175 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 20:00:50,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:50,176 INFO L85 PathProgramCache]: Analyzing trace with hash -2097405785, now seen corresponding path program 4 times [2024-06-27 20:00:50,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:50,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866964975] [2024-06-27 20:00:50,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:50,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:50,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:51,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:51,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:51,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866964975] [2024-06-27 20:00:51,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866964975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:51,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:51,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:00:51,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014473141] [2024-06-27 20:00:51,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:51,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:00:51,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:51,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:00:51,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:00:51,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:00:51,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 451 transitions, 5553 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 20:00:51,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:51,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:00:51,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:52,706 INFO L124 PetriNetUnfolderBase]: 3760/6116 cut-off events. [2024-06-27 20:00:52,706 INFO L125 PetriNetUnfolderBase]: For 1500575/1500578 co-relation queries the response was YES. [2024-06-27 20:00:52,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66293 conditions, 6116 events. 3760/6116 cut-off events. For 1500575/1500578 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 38845 event pairs, 802 based on Foata normal form. 1/6060 useless extension candidates. Maximal degree in co-relation 66126. Up to 5557 conditions per place. [2024-06-27 20:00:52,794 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 403 selfloop transitions, 26 changer transitions 0/468 dead transitions. [2024-06-27 20:00:52,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 468 transitions, 6453 flow [2024-06-27 20:00:52,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:00:52,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:00:52,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 20:00:52,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-27 20:00:52,796 INFO L175 Difference]: Start difference. First operand has 342 places, 451 transitions, 5553 flow. Second operand 8 states and 153 transitions. [2024-06-27 20:00:52,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 468 transitions, 6453 flow [2024-06-27 20:00:56,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 468 transitions, 6219 flow, removed 69 selfloop flow, removed 6 redundant places. [2024-06-27 20:00:56,162 INFO L231 Difference]: Finished difference. Result has 344 places, 451 transitions, 5377 flow [2024-06-27 20:00:56,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5319, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5377, PETRI_PLACES=344, PETRI_TRANSITIONS=451} [2024-06-27 20:00:56,162 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 300 predicate places. [2024-06-27 20:00:56,162 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 451 transitions, 5377 flow [2024-06-27 20:00:56,162 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 20:00:56,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:56,163 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 20:00:56,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 20:00:56,163 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 20:00:56,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:56,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1683862003, now seen corresponding path program 8 times [2024-06-27 20:00:56,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:56,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57447990] [2024-06-27 20:00:56,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:56,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:56,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:56,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:56,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:56,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57447990] [2024-06-27 20:00:56,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57447990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:56,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:56,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:00:56,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87003902] [2024-06-27 20:00:56,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:56,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:00:56,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:56,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:00:56,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:00:56,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:00:56,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 451 transitions, 5377 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 20:00:56,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:56,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:00:56,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:58,617 INFO L124 PetriNetUnfolderBase]: 3929/6334 cut-off events. [2024-06-27 20:00:58,618 INFO L125 PetriNetUnfolderBase]: For 1534612/1534615 co-relation queries the response was YES. [2024-06-27 20:00:58,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67772 conditions, 6334 events. 3929/6334 cut-off events. For 1534612/1534615 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 39825 event pairs, 849 based on Foata normal form. 1/6322 useless extension candidates. Maximal degree in co-relation 67604. Up to 5831 conditions per place. [2024-06-27 20:00:58,703 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 388 selfloop transitions, 79 changer transitions 0/472 dead transitions. [2024-06-27 20:00:58,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 472 transitions, 6843 flow [2024-06-27 20:00:58,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:00:58,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:00:58,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 20:00:58,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-27 20:00:58,705 INFO L175 Difference]: Start difference. First operand has 344 places, 451 transitions, 5377 flow. Second operand 8 states and 151 transitions. [2024-06-27 20:00:58,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 472 transitions, 6843 flow [2024-06-27 20:01:03,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 472 transitions, 6706 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-27 20:01:03,151 INFO L231 Difference]: Finished difference. Result has 344 places, 457 transitions, 5670 flow [2024-06-27 20:01:03,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5240, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5670, PETRI_PLACES=344, PETRI_TRANSITIONS=457} [2024-06-27 20:01:03,151 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 300 predicate places. [2024-06-27 20:01:03,151 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 457 transitions, 5670 flow [2024-06-27 20:01:03,152 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 20:01:03,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:03,152 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 20:01:03,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 20:01:03,152 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 20:01:03,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:03,153 INFO L85 PathProgramCache]: Analyzing trace with hash -2119554427, now seen corresponding path program 9 times [2024-06-27 20:01:03,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:03,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506824999] [2024-06-27 20:01:03,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:03,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:03,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:03,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:03,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:03,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506824999] [2024-06-27 20:01:03,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506824999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:03,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:03,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:01:03,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361996037] [2024-06-27 20:01:03,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:03,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:01:03,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:03,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:01:03,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:01:04,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:01:04,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 457 transitions, 5670 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 20:01:04,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:04,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:01:04,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:05,532 INFO L124 PetriNetUnfolderBase]: 3926/6320 cut-off events. [2024-06-27 20:01:05,533 INFO L125 PetriNetUnfolderBase]: For 1555931/1555934 co-relation queries the response was YES. [2024-06-27 20:01:05,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68133 conditions, 6320 events. 3926/6320 cut-off events. For 1555931/1555934 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 39611 event pairs, 850 based on Foata normal form. 1/6308 useless extension candidates. Maximal degree in co-relation 67964. Up to 5828 conditions per place. [2024-06-27 20:01:05,634 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 388 selfloop transitions, 78 changer transitions 0/471 dead transitions. [2024-06-27 20:01:05,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 471 transitions, 6636 flow [2024-06-27 20:01:05,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:01:05,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:01:05,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 20:01:05,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-27 20:01:05,635 INFO L175 Difference]: Start difference. First operand has 344 places, 457 transitions, 5670 flow. Second operand 8 states and 149 transitions. [2024-06-27 20:01:05,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 471 transitions, 6636 flow [2024-06-27 20:01:10,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 471 transitions, 6289 flow, removed 115 selfloop flow, removed 5 redundant places. [2024-06-27 20:01:10,060 INFO L231 Difference]: Finished difference. Result has 347 places, 457 transitions, 5485 flow [2024-06-27 20:01:10,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5323, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5485, PETRI_PLACES=347, PETRI_TRANSITIONS=457} [2024-06-27 20:01:10,061 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 303 predicate places. [2024-06-27 20:01:10,061 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 457 transitions, 5485 flow [2024-06-27 20:01:10,061 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 20:01:10,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:10,061 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 20:01:10,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 20:01:10,062 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 20:01:10,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:10,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1683623675, now seen corresponding path program 5 times [2024-06-27 20:01:10,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:10,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447802169] [2024-06-27 20:01:10,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:10,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:10,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:10,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:10,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:10,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447802169] [2024-06-27 20:01:10,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447802169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:10,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:10,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:01:10,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228843316] [2024-06-27 20:01:10,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:10,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:01:10,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:10,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:01:10,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:01:11,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:01:11,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 457 transitions, 5485 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 20:01:11,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:11,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:01:11,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:12,452 INFO L124 PetriNetUnfolderBase]: 3783/6148 cut-off events. [2024-06-27 20:01:12,452 INFO L125 PetriNetUnfolderBase]: For 1581671/1581674 co-relation queries the response was YES. [2024-06-27 20:01:12,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67361 conditions, 6148 events. 3783/6148 cut-off events. For 1581671/1581674 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 39090 event pairs, 800 based on Foata normal form. 1/6092 useless extension candidates. Maximal degree in co-relation 67191. Up to 5557 conditions per place. [2024-06-27 20:01:12,566 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 391 selfloop transitions, 47 changer transitions 0/479 dead transitions. [2024-06-27 20:01:12,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 479 transitions, 6796 flow [2024-06-27 20:01:12,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:01:12,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:01:12,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 20:01:12,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-27 20:01:12,567 INFO L175 Difference]: Start difference. First operand has 347 places, 457 transitions, 5485 flow. Second operand 8 states and 155 transitions. [2024-06-27 20:01:12,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 479 transitions, 6796 flow [2024-06-27 20:01:15,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 479 transitions, 6607 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 20:01:15,895 INFO L231 Difference]: Finished difference. Result has 349 places, 464 transitions, 5586 flow [2024-06-27 20:01:15,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5296, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5586, PETRI_PLACES=349, PETRI_TRANSITIONS=464} [2024-06-27 20:01:15,896 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 305 predicate places. [2024-06-27 20:01:15,896 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 464 transitions, 5586 flow [2024-06-27 20:01:15,896 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 20:01:15,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:15,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:15,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 20:01:15,896 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 20:01:15,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:15,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1684098905, now seen corresponding path program 6 times [2024-06-27 20:01:15,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:15,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706108962] [2024-06-27 20:01:15,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:15,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:15,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:16,774 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 20:01:16,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:16,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706108962] [2024-06-27 20:01:16,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706108962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:16,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:16,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:01:16,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904643314] [2024-06-27 20:01:16,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:16,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:01:16,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:16,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:01:16,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:01:16,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:01:16,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 464 transitions, 5586 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 20:01:16,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:16,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:01:16,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:18,418 INFO L124 PetriNetUnfolderBase]: 3778/6152 cut-off events. [2024-06-27 20:01:18,419 INFO L125 PetriNetUnfolderBase]: For 1598194/1598197 co-relation queries the response was YES. [2024-06-27 20:01:18,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67355 conditions, 6152 events. 3778/6152 cut-off events. For 1598194/1598197 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 39278 event pairs, 799 based on Foata normal form. 1/6096 useless extension candidates. Maximal degree in co-relation 67183. Up to 5569 conditions per place. [2024-06-27 20:01:18,517 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 402 selfloop transitions, 35 changer transitions 0/478 dead transitions. [2024-06-27 20:01:18,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 478 transitions, 6494 flow [2024-06-27 20:01:18,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:01:18,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:01:18,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 20:01:18,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 20:01:18,518 INFO L175 Difference]: Start difference. First operand has 349 places, 464 transitions, 5586 flow. Second operand 8 states and 152 transitions. [2024-06-27 20:01:18,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 478 transitions, 6494 flow [2024-06-27 20:01:21,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 478 transitions, 6311 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-27 20:01:21,474 INFO L231 Difference]: Finished difference. Result has 352 places, 464 transitions, 5479 flow [2024-06-27 20:01:21,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5403, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5479, PETRI_PLACES=352, PETRI_TRANSITIONS=464} [2024-06-27 20:01:21,474 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 308 predicate places. [2024-06-27 20:01:21,474 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 464 transitions, 5479 flow [2024-06-27 20:01:21,475 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 20:01:21,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:21,475 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 20:01:21,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 20:01:21,475 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 20:01:21,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:21,476 INFO L85 PathProgramCache]: Analyzing trace with hash -172235925, now seen corresponding path program 7 times [2024-06-27 20:01:21,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:21,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707212875] [2024-06-27 20:01:21,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:21,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:21,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:22,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:22,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:22,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707212875] [2024-06-27 20:01:22,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707212875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:22,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:22,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:01:22,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698194306] [2024-06-27 20:01:22,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:22,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:01:22,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:22,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:01:22,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:01:22,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:01:22,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 464 transitions, 5479 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 20:01:22,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:22,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:01:22,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:23,940 INFO L124 PetriNetUnfolderBase]: 3807/6201 cut-off events. [2024-06-27 20:01:23,940 INFO L125 PetriNetUnfolderBase]: For 1642628/1642634 co-relation queries the response was YES. [2024-06-27 20:01:24,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68285 conditions, 6201 events. 3807/6201 cut-off events. For 1642628/1642634 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 39596 event pairs, 823 based on Foata normal form. 3/6147 useless extension candidates. Maximal degree in co-relation 68112. Up to 5414 conditions per place. [2024-06-27 20:01:24,038 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 331 selfloop transitions, 116 changer transitions 0/488 dead transitions. [2024-06-27 20:01:24,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 488 transitions, 7152 flow [2024-06-27 20:01:24,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:01:24,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:01:24,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 20:01:24,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-27 20:01:24,040 INFO L175 Difference]: Start difference. First operand has 352 places, 464 transitions, 5479 flow. Second operand 8 states and 155 transitions. [2024-06-27 20:01:24,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 488 transitions, 7152 flow [2024-06-27 20:01:28,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 488 transitions, 7084 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 20:01:28,477 INFO L231 Difference]: Finished difference. Result has 355 places, 475 transitions, 5939 flow [2024-06-27 20:01:28,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5411, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5939, PETRI_PLACES=355, PETRI_TRANSITIONS=475} [2024-06-27 20:01:28,478 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 311 predicate places. [2024-06-27 20:01:28,478 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 475 transitions, 5939 flow [2024-06-27 20:01:28,478 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 20:01:28,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:28,478 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 20:01:28,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 20:01:28,478 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 20:01:28,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:28,479 INFO L85 PathProgramCache]: Analyzing trace with hash -172443315, now seen corresponding path program 8 times [2024-06-27 20:01:28,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:28,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172133315] [2024-06-27 20:01:28,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:28,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:28,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:29,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:29,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:29,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172133315] [2024-06-27 20:01:29,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172133315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:29,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:29,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:01:29,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753558345] [2024-06-27 20:01:29,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:29,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:01:29,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:29,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:01:29,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:01:29,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:01:29,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 475 transitions, 5939 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 20:01:29,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:29,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:01:29,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:30,989 INFO L124 PetriNetUnfolderBase]: 3801/6191 cut-off events. [2024-06-27 20:01:30,989 INFO L125 PetriNetUnfolderBase]: For 1660867/1660873 co-relation queries the response was YES. [2024-06-27 20:01:31,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68471 conditions, 6191 events. 3801/6191 cut-off events. For 1660867/1660873 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 39549 event pairs, 828 based on Foata normal form. 4/6138 useless extension candidates. Maximal degree in co-relation 68296. Up to 5409 conditions per place. [2024-06-27 20:01:31,097 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 339 selfloop transitions, 108 changer transitions 0/488 dead transitions. [2024-06-27 20:01:31,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 488 transitions, 7355 flow [2024-06-27 20:01:31,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:01:31,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:01:31,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 20:01:31,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-27 20:01:31,263 INFO L175 Difference]: Start difference. First operand has 355 places, 475 transitions, 5939 flow. Second operand 8 states and 156 transitions. [2024-06-27 20:01:31,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 488 transitions, 7355 flow [2024-06-27 20:01:35,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 488 transitions, 7147 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-27 20:01:35,744 INFO L231 Difference]: Finished difference. Result has 359 places, 475 transitions, 5955 flow [2024-06-27 20:01:35,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5731, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5955, PETRI_PLACES=359, PETRI_TRANSITIONS=475} [2024-06-27 20:01:35,745 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 315 predicate places. [2024-06-27 20:01:35,745 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 475 transitions, 5955 flow [2024-06-27 20:01:35,745 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 20:01:35,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:35,745 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 20:01:35,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 20:01:35,746 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:01:35,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:35,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1180013299, now seen corresponding path program 10 times [2024-06-27 20:01:35,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:35,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92068920] [2024-06-27 20:01:35,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:35,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:35,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:36,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:36,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:36,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92068920] [2024-06-27 20:01:36,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92068920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:36,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:36,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:01:36,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465826845] [2024-06-27 20:01:36,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:36,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:01:36,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:36,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:01:36,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:01:36,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:01:36,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 475 transitions, 5955 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 20:01:36,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:36,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:01:36,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:38,222 INFO L124 PetriNetUnfolderBase]: 3969/6397 cut-off events. [2024-06-27 20:01:38,222 INFO L125 PetriNetUnfolderBase]: For 1694367/1694373 co-relation queries the response was YES. [2024-06-27 20:01:38,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69958 conditions, 6397 events. 3969/6397 cut-off events. For 1694367/1694373 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 40191 event pairs, 887 based on Foata normal form. 2/6390 useless extension candidates. Maximal degree in co-relation 69782. Up to 5773 conditions per place. [2024-06-27 20:01:38,323 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 396 selfloop transitions, 95 changer transitions 0/496 dead transitions. [2024-06-27 20:01:38,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 496 transitions, 7795 flow [2024-06-27 20:01:38,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:01:38,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:01:38,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:01:38,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-27 20:01:38,325 INFO L175 Difference]: Start difference. First operand has 359 places, 475 transitions, 5955 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:01:38,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 496 transitions, 7795 flow [2024-06-27 20:01:42,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 496 transitions, 7542 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-27 20:01:42,431 INFO L231 Difference]: Finished difference. Result has 362 places, 482 transitions, 6183 flow [2024-06-27 20:01:42,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5702, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6183, PETRI_PLACES=362, PETRI_TRANSITIONS=482} [2024-06-27 20:01:42,432 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 318 predicate places. [2024-06-27 20:01:42,432 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 482 transitions, 6183 flow [2024-06-27 20:01:42,432 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 20:01:42,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:42,432 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 20:01:42,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 20:01:42,433 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:01:42,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:42,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1764991143, now seen corresponding path program 9 times [2024-06-27 20:01:42,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:42,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714135674] [2024-06-27 20:01:42,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:42,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:42,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:43,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:43,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:43,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714135674] [2024-06-27 20:01:43,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714135674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:43,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:43,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:01:43,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300054250] [2024-06-27 20:01:43,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:43,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:01:43,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:43,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:01:43,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:01:43,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:01:43,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 482 transitions, 6183 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 20:01:43,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:43,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:01:43,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:45,273 INFO L124 PetriNetUnfolderBase]: 3813/6192 cut-off events. [2024-06-27 20:01:45,273 INFO L125 PetriNetUnfolderBase]: For 1716594/1716600 co-relation queries the response was YES. [2024-06-27 20:01:45,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69383 conditions, 6192 events. 3813/6192 cut-off events. For 1716594/1716600 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 39370 event pairs, 818 based on Foata normal form. 4/6139 useless extension candidates. Maximal degree in co-relation 69206. Up to 5556 conditions per place. [2024-06-27 20:01:45,361 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 398 selfloop transitions, 55 changer transitions 0/496 dead transitions. [2024-06-27 20:01:45,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 496 transitions, 7199 flow [2024-06-27 20:01:45,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:01:45,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:01:45,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 20:01:45,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 20:01:45,363 INFO L175 Difference]: Start difference. First operand has 362 places, 482 transitions, 6183 flow. Second operand 8 states and 152 transitions. [2024-06-27 20:01:45,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 496 transitions, 7199 flow [2024-06-27 20:01:50,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 496 transitions, 6875 flow, removed 94 selfloop flow, removed 5 redundant places. [2024-06-27 20:01:50,152 INFO L231 Difference]: Finished difference. Result has 365 places, 485 transitions, 6066 flow [2024-06-27 20:01:50,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5859, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6066, PETRI_PLACES=365, PETRI_TRANSITIONS=485} [2024-06-27 20:01:50,153 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 321 predicate places. [2024-06-27 20:01:50,153 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 485 transitions, 6066 flow [2024-06-27 20:01:50,153 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 20:01:50,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:50,153 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 20:01:50,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 20:01:50,153 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:01:50,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:50,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1179716381, now seen corresponding path program 10 times [2024-06-27 20:01:50,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:50,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604739861] [2024-06-27 20:01:50,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:50,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:50,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:51,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:51,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:51,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604739861] [2024-06-27 20:01:51,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604739861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:51,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:51,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:01:51,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009511139] [2024-06-27 20:01:51,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:51,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:01:51,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:51,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:01:51,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:01:51,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:01:51,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 485 transitions, 6066 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 20:01:51,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:51,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:01:51,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:53,077 INFO L124 PetriNetUnfolderBase]: 3807/6194 cut-off events. [2024-06-27 20:01:53,078 INFO L125 PetriNetUnfolderBase]: For 1719048/1719054 co-relation queries the response was YES. [2024-06-27 20:01:53,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68625 conditions, 6194 events. 3807/6194 cut-off events. For 1719048/1719054 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 39479 event pairs, 818 based on Foata normal form. 4/6141 useless extension candidates. Maximal degree in co-relation 68447. Up to 5511 conditions per place. [2024-06-27 20:01:53,171 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 385 selfloop transitions, 69 changer transitions 0/497 dead transitions. [2024-06-27 20:01:53,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 497 transitions, 7254 flow [2024-06-27 20:01:53,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:01:53,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:01:53,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 20:01:53,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-27 20:01:53,173 INFO L175 Difference]: Start difference. First operand has 365 places, 485 transitions, 6066 flow. Second operand 8 states and 154 transitions. [2024-06-27 20:01:53,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 497 transitions, 7254 flow [2024-06-27 20:01:58,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 497 transitions, 7025 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-27 20:01:58,160 INFO L231 Difference]: Finished difference. Result has 367 places, 485 transitions, 5984 flow [2024-06-27 20:01:58,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5837, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5984, PETRI_PLACES=367, PETRI_TRANSITIONS=485} [2024-06-27 20:01:58,161 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 323 predicate places. [2024-06-27 20:01:58,161 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 485 transitions, 5984 flow [2024-06-27 20:01:58,161 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 20:01:58,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:58,161 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 20:01:58,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 20:01:58,161 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:01:58,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:58,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1942597893, now seen corresponding path program 11 times [2024-06-27 20:01:58,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:58,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622902745] [2024-06-27 20:01:58,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:58,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:58,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:59,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:59,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:59,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622902745] [2024-06-27 20:01:59,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622902745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:59,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:59,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:01:59,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825474879] [2024-06-27 20:01:59,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:59,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:01:59,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:59,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:01:59,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:01:59,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:01:59,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 485 transitions, 5984 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 20:01:59,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:59,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:01:59,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:00,741 INFO L124 PetriNetUnfolderBase]: 3802/6188 cut-off events. [2024-06-27 20:02:00,742 INFO L125 PetriNetUnfolderBase]: For 1727953/1727959 co-relation queries the response was YES. [2024-06-27 20:02:00,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68537 conditions, 6188 events. 3802/6188 cut-off events. For 1727953/1727959 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 39482 event pairs, 820 based on Foata normal form. 3/6134 useless extension candidates. Maximal degree in co-relation 68358. Up to 5525 conditions per place. [2024-06-27 20:02:00,840 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 383 selfloop transitions, 71 changer transitions 0/497 dead transitions. [2024-06-27 20:02:00,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 497 transitions, 7174 flow [2024-06-27 20:02:00,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:02:00,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:02:00,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 20:02:00,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-27 20:02:00,842 INFO L175 Difference]: Start difference. First operand has 367 places, 485 transitions, 5984 flow. Second operand 8 states and 153 transitions. [2024-06-27 20:02:00,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 497 transitions, 7174 flow [2024-06-27 20:02:05,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 497 transitions, 7016 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-27 20:02:05,520 INFO L231 Difference]: Finished difference. Result has 370 places, 485 transitions, 5974 flow [2024-06-27 20:02:05,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5826, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5974, PETRI_PLACES=370, PETRI_TRANSITIONS=485} [2024-06-27 20:02:05,520 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 326 predicate places. [2024-06-27 20:02:05,521 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 485 transitions, 5974 flow [2024-06-27 20:02:05,521 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 20:02:05,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:05,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:05,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 20:02:05,521 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:02:05,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:05,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1942122663, now seen corresponding path program 12 times [2024-06-27 20:02:05,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:05,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694692700] [2024-06-27 20:02:05,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:05,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:05,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:06,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:06,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:06,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694692700] [2024-06-27 20:02:06,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694692700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:06,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:06,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:02:06,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106828] [2024-06-27 20:02:06,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:06,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:02:06,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:06,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:02:06,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:02:06,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:02:06,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 485 transitions, 5974 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 20:02:06,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:06,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:02:06,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:07,986 INFO L124 PetriNetUnfolderBase]: 3795/6178 cut-off events. [2024-06-27 20:02:07,987 INFO L125 PetriNetUnfolderBase]: For 1744949/1744955 co-relation queries the response was YES. [2024-06-27 20:02:08,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68506 conditions, 6178 events. 3795/6178 cut-off events. For 1744949/1744955 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 39437 event pairs, 820 based on Foata normal form. 3/6124 useless extension candidates. Maximal degree in co-relation 68326. Up to 5537 conditions per place. [2024-06-27 20:02:08,088 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 395 selfloop transitions, 58 changer transitions 0/496 dead transitions. [2024-06-27 20:02:08,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 496 transitions, 6906 flow [2024-06-27 20:02:08,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:02:08,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:02:08,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:02:08,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-27 20:02:08,090 INFO L175 Difference]: Start difference. First operand has 370 places, 485 transitions, 5974 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:02:08,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 496 transitions, 6906 flow [2024-06-27 20:02:13,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 496 transitions, 6552 flow, removed 41 selfloop flow, removed 10 redundant places. [2024-06-27 20:02:13,392 INFO L231 Difference]: Finished difference. Result has 368 places, 485 transitions, 5742 flow [2024-06-27 20:02:13,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5620, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5742, PETRI_PLACES=368, PETRI_TRANSITIONS=485} [2024-06-27 20:02:13,392 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 324 predicate places. [2024-06-27 20:02:13,393 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 485 transitions, 5742 flow [2024-06-27 20:02:13,393 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 20:02:13,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:13,393 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 20:02:13,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 20:02:13,393 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:02:13,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:13,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1942122415, now seen corresponding path program 11 times [2024-06-27 20:02:13,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:13,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695688837] [2024-06-27 20:02:13,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:13,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:13,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:14,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:14,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:14,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695688837] [2024-06-27 20:02:14,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695688837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:14,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:14,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:02:14,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191481735] [2024-06-27 20:02:14,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:14,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:02:14,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:14,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:02:14,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:02:14,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:02:14,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 485 transitions, 5742 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 20:02:14,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:14,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:02:14,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:15,710 INFO L124 PetriNetUnfolderBase]: 3960/6385 cut-off events. [2024-06-27 20:02:15,710 INFO L125 PetriNetUnfolderBase]: For 1773537/1773543 co-relation queries the response was YES. [2024-06-27 20:02:15,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69672 conditions, 6385 events. 3960/6385 cut-off events. For 1773537/1773543 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 40134 event pairs, 885 based on Foata normal form. 1/6377 useless extension candidates. Maximal degree in co-relation 69493. Up to 5758 conditions per place. [2024-06-27 20:02:15,813 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 395 selfloop transitions, 104 changer transitions 0/504 dead transitions. [2024-06-27 20:02:15,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 504 transitions, 7542 flow [2024-06-27 20:02:15,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:02:15,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:02:15,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 20:02:15,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-27 20:02:15,815 INFO L175 Difference]: Start difference. First operand has 368 places, 485 transitions, 5742 flow. Second operand 8 states and 149 transitions. [2024-06-27 20:02:15,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 504 transitions, 7542 flow [2024-06-27 20:02:20,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 504 transitions, 7376 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 20:02:20,833 INFO L231 Difference]: Finished difference. Result has 368 places, 491 transitions, 6048 flow [2024-06-27 20:02:20,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5576, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6048, PETRI_PLACES=368, PETRI_TRANSITIONS=491} [2024-06-27 20:02:20,834 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 324 predicate places. [2024-06-27 20:02:20,834 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 491 transitions, 6048 flow [2024-06-27 20:02:20,834 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 20:02:20,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:20,834 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 20:02:20,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 20:02:20,835 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:02:20,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:20,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1942359565, now seen corresponding path program 12 times [2024-06-27 20:02:20,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:20,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085293607] [2024-06-27 20:02:20,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:20,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:20,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:21,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:21,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:21,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085293607] [2024-06-27 20:02:21,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085293607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:21,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:21,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:02:21,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447650377] [2024-06-27 20:02:21,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:21,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:02:21,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:21,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:02:21,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:02:21,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:02:21,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 491 transitions, 6048 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 20:02:21,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:21,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:02:21,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:23,213 INFO L124 PetriNetUnfolderBase]: 3957/6373 cut-off events. [2024-06-27 20:02:23,214 INFO L125 PetriNetUnfolderBase]: For 1793590/1793596 co-relation queries the response was YES. [2024-06-27 20:02:23,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69878 conditions, 6373 events. 3957/6373 cut-off events. For 1793590/1793596 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 39973 event pairs, 882 based on Foata normal form. 1/6365 useless extension candidates. Maximal degree in co-relation 69698. Up to 5756 conditions per place. [2024-06-27 20:02:23,314 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 392 selfloop transitions, 106 changer transitions 0/503 dead transitions. [2024-06-27 20:02:23,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 503 transitions, 7332 flow [2024-06-27 20:02:23,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:02:23,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:02:23,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 20:02:23,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-27 20:02:23,315 INFO L175 Difference]: Start difference. First operand has 368 places, 491 transitions, 6048 flow. Second operand 8 states and 148 transitions. [2024-06-27 20:02:23,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 503 transitions, 7332 flow [2024-06-27 20:02:28,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 503 transitions, 7021 flow, removed 118 selfloop flow, removed 4 redundant places. [2024-06-27 20:02:28,827 INFO L231 Difference]: Finished difference. Result has 372 places, 491 transitions, 5955 flow [2024-06-27 20:02:28,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5737, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5955, PETRI_PLACES=372, PETRI_TRANSITIONS=491} [2024-06-27 20:02:28,840 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 328 predicate places. [2024-06-27 20:02:28,840 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 491 transitions, 5955 flow [2024-06-27 20:02:28,841 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 20:02:28,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:28,841 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 20:02:28,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 20:02:28,841 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 20:02:28,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:28,841 INFO L85 PathProgramCache]: Analyzing trace with hash -851766470, now seen corresponding path program 2 times [2024-06-27 20:02:28,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:28,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709203747] [2024-06-27 20:02:28,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:28,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:28,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:29,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:29,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:29,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709203747] [2024-06-27 20:02:29,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709203747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:29,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:29,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:02:29,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734988011] [2024-06-27 20:02:29,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:29,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:02:29,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:29,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:02:29,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:02:29,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:02:29,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 491 transitions, 5955 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:29,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:29,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:02:29,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:31,770 INFO L124 PetriNetUnfolderBase]: 4080/6616 cut-off events. [2024-06-27 20:02:31,771 INFO L125 PetriNetUnfolderBase]: For 1867083/1867089 co-relation queries the response was YES. [2024-06-27 20:02:31,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71072 conditions, 6616 events. 4080/6616 cut-off events. For 1867083/1867089 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 42201 event pairs, 870 based on Foata normal form. 14/6621 useless extension candidates. Maximal degree in co-relation 70891. Up to 5610 conditions per place. [2024-06-27 20:02:31,879 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 449 selfloop transitions, 84 changer transitions 0/538 dead transitions. [2024-06-27 20:02:31,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 538 transitions, 7303 flow [2024-06-27 20:02:31,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:02:31,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:02:31,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-27 20:02:31,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4604651162790698 [2024-06-27 20:02:31,881 INFO L175 Difference]: Start difference. First operand has 372 places, 491 transitions, 5955 flow. Second operand 10 states and 198 transitions. [2024-06-27 20:02:31,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 538 transitions, 7303 flow [2024-06-27 20:02:37,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 538 transitions, 7135 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 20:02:37,735 INFO L231 Difference]: Finished difference. Result has 377 places, 499 transitions, 6099 flow [2024-06-27 20:02:37,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5787, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6099, PETRI_PLACES=377, PETRI_TRANSITIONS=499} [2024-06-27 20:02:37,748 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 333 predicate places. [2024-06-27 20:02:37,748 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 499 transitions, 6099 flow [2024-06-27 20:02:37,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:37,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:37,752 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 20:02:37,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 20:02:37,752 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 20:02:37,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:37,753 INFO L85 PathProgramCache]: Analyzing trace with hash -213766242, now seen corresponding path program 3 times [2024-06-27 20:02:37,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:37,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436311929] [2024-06-27 20:02:37,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:37,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:37,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:38,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:38,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:38,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436311929] [2024-06-27 20:02:38,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436311929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:38,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:38,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:02:38,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473899346] [2024-06-27 20:02:38,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:38,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:02:38,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:38,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:02:38,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:02:38,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:02:38,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 499 transitions, 6099 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:38,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:38,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:02:38,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:40,686 INFO L124 PetriNetUnfolderBase]: 4190/6816 cut-off events. [2024-06-27 20:02:40,686 INFO L125 PetriNetUnfolderBase]: For 1902058/1902064 co-relation queries the response was YES. [2024-06-27 20:02:40,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72961 conditions, 6816 events. 4190/6816 cut-off events. For 1902058/1902064 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 44036 event pairs, 895 based on Foata normal form. 14/6821 useless extension candidates. Maximal degree in co-relation 72778. Up to 5883 conditions per place. [2024-06-27 20:02:40,814 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 443 selfloop transitions, 97 changer transitions 0/545 dead transitions. [2024-06-27 20:02:40,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 545 transitions, 7463 flow [2024-06-27 20:02:40,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:02:40,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:02:40,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-27 20:02:40,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-27 20:02:40,816 INFO L175 Difference]: Start difference. First operand has 377 places, 499 transitions, 6099 flow. Second operand 10 states and 196 transitions. [2024-06-27 20:02:40,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 545 transitions, 7463 flow [2024-06-27 20:02:47,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 545 transitions, 7281 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 20:02:47,007 INFO L231 Difference]: Finished difference. Result has 384 places, 507 transitions, 6282 flow [2024-06-27 20:02:47,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5927, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6282, PETRI_PLACES=384, PETRI_TRANSITIONS=507} [2024-06-27 20:02:47,008 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 340 predicate places. [2024-06-27 20:02:47,008 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 507 transitions, 6282 flow [2024-06-27 20:02:47,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:47,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:47,008 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 20:02:47,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 20:02:47,009 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 20:02:47,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:47,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1404990266, now seen corresponding path program 4 times [2024-06-27 20:02:47,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:47,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666171931] [2024-06-27 20:02:47,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:47,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:47,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:47,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:47,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:47,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666171931] [2024-06-27 20:02:47,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666171931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:47,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:47,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:02:47,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361349903] [2024-06-27 20:02:47,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:47,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:02:47,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:47,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:02:47,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:02:48,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:02:48,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 507 transitions, 6282 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:48,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:48,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:02:48,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:49,853 INFO L124 PetriNetUnfolderBase]: 4211/6865 cut-off events. [2024-06-27 20:02:49,853 INFO L125 PetriNetUnfolderBase]: For 1878413/1878419 co-relation queries the response was YES. [2024-06-27 20:02:49,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72500 conditions, 6865 events. 4211/6865 cut-off events. For 1878413/1878419 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 44504 event pairs, 837 based on Foata normal form. 14/6870 useless extension candidates. Maximal degree in co-relation 72314. Up to 4853 conditions per place. [2024-06-27 20:02:49,980 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 430 selfloop transitions, 113 changer transitions 0/548 dead transitions. [2024-06-27 20:02:49,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 548 transitions, 7819 flow [2024-06-27 20:02:49,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:02:49,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:02:49,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-27 20:02:49,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45813953488372094 [2024-06-27 20:02:49,982 INFO L175 Difference]: Start difference. First operand has 384 places, 507 transitions, 6282 flow. Second operand 10 states and 197 transitions. [2024-06-27 20:02:49,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 548 transitions, 7819 flow [2024-06-27 20:02:55,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 548 transitions, 7670 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-27 20:02:55,729 INFO L231 Difference]: Finished difference. Result has 391 places, 508 transitions, 6423 flow [2024-06-27 20:02:55,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6133, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6423, PETRI_PLACES=391, PETRI_TRANSITIONS=508} [2024-06-27 20:02:55,730 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 347 predicate places. [2024-06-27 20:02:55,730 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 508 transitions, 6423 flow [2024-06-27 20:02:55,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:55,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:55,730 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 20:02:55,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 20:02:55,730 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 20:02:55,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:55,731 INFO L85 PathProgramCache]: Analyzing trace with hash 832087768, now seen corresponding path program 5 times [2024-06-27 20:02:55,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:55,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941047647] [2024-06-27 20:02:55,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:55,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:55,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:56,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:56,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:56,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941047647] [2024-06-27 20:02:56,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941047647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:56,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:56,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:02:56,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972881155] [2024-06-27 20:02:56,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:56,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:02:56,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:56,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:02:56,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:02:56,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:02:56,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 508 transitions, 6423 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:56,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:56,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:02:56,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:58,678 INFO L124 PetriNetUnfolderBase]: 4191/6833 cut-off events. [2024-06-27 20:02:58,679 INFO L125 PetriNetUnfolderBase]: For 1831389/1831395 co-relation queries the response was YES. [2024-06-27 20:02:58,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70947 conditions, 6833 events. 4191/6833 cut-off events. For 1831389/1831395 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 44312 event pairs, 882 based on Foata normal form. 14/6838 useless extension candidates. Maximal degree in co-relation 70759. Up to 5890 conditions per place. [2024-06-27 20:02:58,804 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 448 selfloop transitions, 92 changer transitions 0/545 dead transitions. [2024-06-27 20:02:58,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 545 transitions, 7549 flow [2024-06-27 20:02:58,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:02:58,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:02:58,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-27 20:02:58,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-27 20:02:58,806 INFO L175 Difference]: Start difference. First operand has 391 places, 508 transitions, 6423 flow. Second operand 10 states and 196 transitions. [2024-06-27 20:02:58,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 545 transitions, 7549 flow [2024-06-27 20:03:04,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 545 transitions, 7245 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-27 20:03:04,706 INFO L231 Difference]: Finished difference. Result has 392 places, 507 transitions, 6189 flow [2024-06-27 20:03:04,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6001, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6189, PETRI_PLACES=392, PETRI_TRANSITIONS=507} [2024-06-27 20:03:04,706 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 348 predicate places. [2024-06-27 20:03:04,707 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 507 transitions, 6189 flow [2024-06-27 20:03:04,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:04,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:04,707 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 20:03:04,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 20:03:04,707 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:04,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:04,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1764867763, now seen corresponding path program 4 times [2024-06-27 20:03:04,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:04,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780545006] [2024-06-27 20:03:04,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:04,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:04,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:05,608 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 20:03:05,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:05,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780545006] [2024-06-27 20:03:05,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780545006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:05,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:05,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:03:05,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518028699] [2024-06-27 20:03:05,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:05,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:03:05,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:05,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:03:05,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:03:05,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:03:05,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 507 transitions, 6189 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 20:03:05,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:05,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:03:05,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:07,360 INFO L124 PetriNetUnfolderBase]: 4034/6638 cut-off events. [2024-06-27 20:03:07,361 INFO L125 PetriNetUnfolderBase]: For 1809057/1809063 co-relation queries the response was YES. [2024-06-27 20:03:07,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68981 conditions, 6638 events. 4034/6638 cut-off events. For 1809057/1809063 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 43664 event pairs, 861 based on Foata normal form. 6/6587 useless extension candidates. Maximal degree in co-relation 68793. Up to 5940 conditions per place. [2024-06-27 20:03:07,471 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 421 selfloop transitions, 56 changer transitions 0/522 dead transitions. [2024-06-27 20:03:07,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 522 transitions, 7323 flow [2024-06-27 20:03:07,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:03:07,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:03:07,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 20:03:07,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-27 20:03:07,473 INFO L175 Difference]: Start difference. First operand has 392 places, 507 transitions, 6189 flow. Second operand 8 states and 151 transitions. [2024-06-27 20:03:07,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 522 transitions, 7323 flow [2024-06-27 20:03:12,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 522 transitions, 6892 flow, removed 12 selfloop flow, removed 12 redundant places. [2024-06-27 20:03:12,013 INFO L231 Difference]: Finished difference. Result has 388 places, 510 transitions, 6034 flow [2024-06-27 20:03:12,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5758, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6034, PETRI_PLACES=388, PETRI_TRANSITIONS=510} [2024-06-27 20:03:12,027 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 344 predicate places. [2024-06-27 20:03:12,027 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 510 transitions, 6034 flow [2024-06-27 20:03:12,027 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 20:03:12,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:12,028 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 20:03:12,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 20:03:12,028 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:12,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:12,028 INFO L85 PathProgramCache]: Analyzing trace with hash -2057318347, now seen corresponding path program 5 times [2024-06-27 20:03:12,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:12,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018164142] [2024-06-27 20:03:12,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:12,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:12,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:13,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:13,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:13,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018164142] [2024-06-27 20:03:13,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018164142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:13,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:13,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:03:13,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963232987] [2024-06-27 20:03:13,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:13,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:03:13,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:13,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:03:13,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:03:13,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:03:13,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 510 transitions, 6034 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:13,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:13,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:03:13,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:14,932 INFO L124 PetriNetUnfolderBase]: 4090/6724 cut-off events. [2024-06-27 20:03:14,933 INFO L125 PetriNetUnfolderBase]: For 1862630/1862633 co-relation queries the response was YES. [2024-06-27 20:03:15,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69949 conditions, 6724 events. 4090/6724 cut-off events. For 1862630/1862633 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 44304 event pairs, 835 based on Foata normal form. 6/6678 useless extension candidates. Maximal degree in co-relation 69764. Up to 6061 conditions per place. [2024-06-27 20:03:15,043 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 439 selfloop transitions, 50 changer transitions 0/534 dead transitions. [2024-06-27 20:03:15,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 534 transitions, 7674 flow [2024-06-27 20:03:15,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:03:15,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:03:15,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-27 20:03:15,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-27 20:03:15,044 INFO L175 Difference]: Start difference. First operand has 388 places, 510 transitions, 6034 flow. Second operand 9 states and 167 transitions. [2024-06-27 20:03:15,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 534 transitions, 7674 flow [2024-06-27 20:03:20,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 534 transitions, 7420 flow, removed 73 selfloop flow, removed 6 redundant places. [2024-06-27 20:03:20,933 INFO L231 Difference]: Finished difference. Result has 392 places, 518 transitions, 6241 flow [2024-06-27 20:03:20,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5780, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6241, PETRI_PLACES=392, PETRI_TRANSITIONS=518} [2024-06-27 20:03:20,934 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 348 predicate places. [2024-06-27 20:03:20,934 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 518 transitions, 6241 flow [2024-06-27 20:03:20,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:20,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:20,934 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 20:03:20,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 20:03:20,934 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:20,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:20,935 INFO L85 PathProgramCache]: Analyzing trace with hash -2072973037, now seen corresponding path program 6 times [2024-06-27 20:03:20,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:20,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475915159] [2024-06-27 20:03:20,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:20,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:20,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:22,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:22,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:22,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475915159] [2024-06-27 20:03:22,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475915159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:22,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:22,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:03:22,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025798594] [2024-06-27 20:03:22,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:22,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:03:22,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:22,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:03:22,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:03:22,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:03:22,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 518 transitions, 6241 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:22,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:22,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:03:22,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:23,714 INFO L124 PetriNetUnfolderBase]: 4162/6832 cut-off events. [2024-06-27 20:03:23,714 INFO L125 PetriNetUnfolderBase]: For 1961766/1961772 co-relation queries the response was YES. [2024-06-27 20:03:23,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72892 conditions, 6832 events. 4162/6832 cut-off events. For 1961766/1961772 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 45054 event pairs, 865 based on Foata normal form. 6/6781 useless extension candidates. Maximal degree in co-relation 72705. Up to 5653 conditions per place. [2024-06-27 20:03:23,827 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 357 selfloop transitions, 149 changer transitions 0/551 dead transitions. [2024-06-27 20:03:23,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 551 transitions, 8799 flow [2024-06-27 20:03:23,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:03:23,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:03:23,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-27 20:03:23,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625322997416021 [2024-06-27 20:03:23,829 INFO L175 Difference]: Start difference. First operand has 392 places, 518 transitions, 6241 flow. Second operand 9 states and 179 transitions. [2024-06-27 20:03:23,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 551 transitions, 8799 flow [2024-06-27 20:03:29,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 551 transitions, 8336 flow, removed 115 selfloop flow, removed 7 redundant places. [2024-06-27 20:03:29,805 INFO L231 Difference]: Finished difference. Result has 395 places, 529 transitions, 6563 flow [2024-06-27 20:03:29,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5778, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6563, PETRI_PLACES=395, PETRI_TRANSITIONS=529} [2024-06-27 20:03:29,806 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 351 predicate places. [2024-06-27 20:03:29,806 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 529 transitions, 6563 flow [2024-06-27 20:03:29,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:29,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:29,806 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 20:03:29,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-27 20:03:29,807 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:29,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:29,807 INFO L85 PathProgramCache]: Analyzing trace with hash -2072986987, now seen corresponding path program 7 times [2024-06-27 20:03:29,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:29,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466551314] [2024-06-27 20:03:29,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:29,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:29,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:30,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:30,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:30,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466551314] [2024-06-27 20:03:30,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466551314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:30,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:30,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:03:30,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545880534] [2024-06-27 20:03:30,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:30,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:03:30,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:30,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:03:30,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:03:30,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:03:30,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 529 transitions, 6563 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:30,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:30,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:03:30,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:32,601 INFO L124 PetriNetUnfolderBase]: 4170/6842 cut-off events. [2024-06-27 20:03:32,601 INFO L125 PetriNetUnfolderBase]: For 1979482/1979488 co-relation queries the response was YES. [2024-06-27 20:03:32,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72934 conditions, 6842 events. 4170/6842 cut-off events. For 1979482/1979488 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 45099 event pairs, 866 based on Foata normal form. 6/6791 useless extension candidates. Maximal degree in co-relation 72747. Up to 5660 conditions per place. [2024-06-27 20:03:32,715 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 351 selfloop transitions, 157 changer transitions 0/553 dead transitions. [2024-06-27 20:03:32,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 553 transitions, 8522 flow [2024-06-27 20:03:32,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:03:32,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:03:32,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-27 20:03:32,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599483204134367 [2024-06-27 20:03:32,716 INFO L175 Difference]: Start difference. First operand has 395 places, 529 transitions, 6563 flow. Second operand 9 states and 178 transitions. [2024-06-27 20:03:32,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 553 transitions, 8522 flow [2024-06-27 20:03:38,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 553 transitions, 8180 flow, removed 130 selfloop flow, removed 4 redundant places. [2024-06-27 20:03:38,382 INFO L231 Difference]: Finished difference. Result has 400 places, 533 transitions, 6733 flow [2024-06-27 20:03:38,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6249, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6733, PETRI_PLACES=400, PETRI_TRANSITIONS=533} [2024-06-27 20:03:38,383 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 356 predicate places. [2024-06-27 20:03:38,383 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 533 transitions, 6733 flow [2024-06-27 20:03:38,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:38,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:38,383 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 20:03:38,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-27 20:03:38,384 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:38,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:38,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1764880659, now seen corresponding path program 8 times [2024-06-27 20:03:38,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:38,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710370393] [2024-06-27 20:03:38,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:38,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:38,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:39,528 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 20:03:39,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:39,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710370393] [2024-06-27 20:03:39,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710370393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:39,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:39,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:03:39,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287722838] [2024-06-27 20:03:39,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:39,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:03:39,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:39,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:03:39,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:03:39,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:03:39,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 533 transitions, 6733 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:39,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:39,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:03:39,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:41,343 INFO L124 PetriNetUnfolderBase]: 4188/6872 cut-off events. [2024-06-27 20:03:41,343 INFO L125 PetriNetUnfolderBase]: For 1998636/1998642 co-relation queries the response was YES. [2024-06-27 20:03:41,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73005 conditions, 6872 events. 4188/6872 cut-off events. For 1998636/1998642 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 45316 event pairs, 881 based on Foata normal form. 6/6821 useless extension candidates. Maximal degree in co-relation 72816. Up to 6146 conditions per place. [2024-06-27 20:03:41,460 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 444 selfloop transitions, 61 changer transitions 0/550 dead transitions. [2024-06-27 20:03:41,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 550 transitions, 7959 flow [2024-06-27 20:03:41,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:03:41,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:03:41,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 20:03:41,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-27 20:03:41,462 INFO L175 Difference]: Start difference. First operand has 400 places, 533 transitions, 6733 flow. Second operand 9 states and 168 transitions. [2024-06-27 20:03:41,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 550 transitions, 7959 flow [2024-06-27 20:03:47,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 550 transitions, 7534 flow, removed 73 selfloop flow, removed 6 redundant places. [2024-06-27 20:03:47,821 INFO L231 Difference]: Finished difference. Result has 403 places, 537 transitions, 6623 flow [2024-06-27 20:03:47,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6314, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6623, PETRI_PLACES=403, PETRI_TRANSITIONS=537} [2024-06-27 20:03:47,822 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 359 predicate places. [2024-06-27 20:03:47,822 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 537 transitions, 6623 flow [2024-06-27 20:03:47,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:47,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:47,822 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 20:03:47,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-27 20:03:47,822 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:47,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:47,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1765298229, now seen corresponding path program 9 times [2024-06-27 20:03:47,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:47,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668216871] [2024-06-27 20:03:47,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:47,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:47,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:48,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:48,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:48,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668216871] [2024-06-27 20:03:48,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668216871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:48,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:48,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:03:48,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61819938] [2024-06-27 20:03:48,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:48,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:03:48,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:48,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:03:48,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:03:49,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:03:49,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 537 transitions, 6623 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:49,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:49,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:03:49,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:50,710 INFO L124 PetriNetUnfolderBase]: 4214/6914 cut-off events. [2024-06-27 20:03:50,710 INFO L125 PetriNetUnfolderBase]: For 2031536/2031542 co-relation queries the response was YES. [2024-06-27 20:03:50,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73202 conditions, 6914 events. 4214/6914 cut-off events. For 2031536/2031542 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 45668 event pairs, 879 based on Foata normal form. 6/6863 useless extension candidates. Maximal degree in co-relation 73012. Up to 6065 conditions per place. [2024-06-27 20:03:50,827 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 435 selfloop transitions, 78 changer transitions 0/558 dead transitions. [2024-06-27 20:03:50,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 558 transitions, 8293 flow [2024-06-27 20:03:50,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:03:50,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:03:50,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-27 20:03:50,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 20:03:50,828 INFO L175 Difference]: Start difference. First operand has 403 places, 537 transitions, 6623 flow. Second operand 9 states and 172 transitions. [2024-06-27 20:03:50,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 558 transitions, 8293 flow [2024-06-27 20:03:57,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 558 transitions, 8020 flow, removed 78 selfloop flow, removed 7 redundant places. [2024-06-27 20:03:57,591 INFO L231 Difference]: Finished difference. Result has 406 places, 542 transitions, 6775 flow [2024-06-27 20:03:57,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6350, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6775, PETRI_PLACES=406, PETRI_TRANSITIONS=542} [2024-06-27 20:03:57,592 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 362 predicate places. [2024-06-27 20:03:57,592 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 542 transitions, 6775 flow [2024-06-27 20:03:57,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:57,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:57,592 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 20:03:57,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-27 20:03:57,593 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:57,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:57,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1765284279, now seen corresponding path program 10 times [2024-06-27 20:03:57,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:57,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870519369] [2024-06-27 20:03:57,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:57,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:57,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:58,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:58,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:58,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870519369] [2024-06-27 20:03:58,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870519369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:58,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:58,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:03:58,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669730196] [2024-06-27 20:03:58,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:58,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:03:58,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:58,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:03:58,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:03:58,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:03:58,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 542 transitions, 6775 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:58,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:58,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:03:58,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:00,629 INFO L124 PetriNetUnfolderBase]: 4216/6915 cut-off events. [2024-06-27 20:04:00,629 INFO L125 PetriNetUnfolderBase]: For 2035121/2035127 co-relation queries the response was YES. [2024-06-27 20:04:00,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73271 conditions, 6915 events. 4216/6915 cut-off events. For 2035121/2035127 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 45605 event pairs, 876 based on Foata normal form. 4/6862 useless extension candidates. Maximal degree in co-relation 73079. Up to 6114 conditions per place. [2024-06-27 20:04:00,748 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 447 selfloop transitions, 80 changer transitions 0/572 dead transitions. [2024-06-27 20:04:00,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 572 transitions, 8661 flow [2024-06-27 20:04:00,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:04:00,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:04:00,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 20:04:00,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 20:04:00,751 INFO L175 Difference]: Start difference. First operand has 406 places, 542 transitions, 6775 flow. Second operand 9 states and 171 transitions. [2024-06-27 20:04:00,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 572 transitions, 8661 flow [2024-06-27 20:04:07,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 572 transitions, 8029 flow, removed 179 selfloop flow, removed 8 redundant places. [2024-06-27 20:04:07,021 INFO L231 Difference]: Finished difference. Result has 409 places, 557 transitions, 6887 flow [2024-06-27 20:04:07,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6325, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6887, PETRI_PLACES=409, PETRI_TRANSITIONS=557} [2024-06-27 20:04:07,022 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 365 predicate places. [2024-06-27 20:04:07,022 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 557 transitions, 6887 flow [2024-06-27 20:04:07,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:07,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:07,022 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 20:04:07,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-27 20:04:07,023 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 20:04:07,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:07,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1793757451, now seen corresponding path program 1 times [2024-06-27 20:04:07,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:07,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046662658] [2024-06-27 20:04:07,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:07,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:07,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:07,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:07,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:07,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046662658] [2024-06-27 20:04:07,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046662658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:07,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:07,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:04:07,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130452392] [2024-06-27 20:04:07,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:07,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:04:07,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:07,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:04:07,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:04:07,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:04:07,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 557 transitions, 6887 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:07,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:07,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:04:07,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:09,873 INFO L124 PetriNetUnfolderBase]: 4243/6982 cut-off events. [2024-06-27 20:04:09,873 INFO L125 PetriNetUnfolderBase]: For 2040988/2040988 co-relation queries the response was YES. [2024-06-27 20:04:09,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73065 conditions, 6982 events. 4243/6982 cut-off events. For 2040988/2040988 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 46088 event pairs, 845 based on Foata normal form. 1/6980 useless extension candidates. Maximal degree in co-relation 72871. Up to 6400 conditions per place. [2024-06-27 20:04:09,983 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 533 selfloop transitions, 20 changer transitions 0/584 dead transitions. [2024-06-27 20:04:09,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 584 transitions, 8163 flow [2024-06-27 20:04:09,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:04:09,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:04:09,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 20:04:09,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-27 20:04:09,984 INFO L175 Difference]: Start difference. First operand has 409 places, 557 transitions, 6887 flow. Second operand 9 states and 168 transitions. [2024-06-27 20:04:09,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 584 transitions, 8163 flow [2024-06-27 20:04:18,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 584 transitions, 7937 flow, removed 84 selfloop flow, removed 4 redundant places. [2024-06-27 20:04:18,025 INFO L231 Difference]: Finished difference. Result has 414 places, 560 transitions, 6823 flow [2024-06-27 20:04:18,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6661, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6823, PETRI_PLACES=414, PETRI_TRANSITIONS=560} [2024-06-27 20:04:18,025 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 370 predicate places. [2024-06-27 20:04:18,026 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 560 transitions, 6823 flow [2024-06-27 20:04:18,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:18,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:18,026 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 20:04:18,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-27 20:04:18,026 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 20:04:18,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:18,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1860984409, now seen corresponding path program 1 times [2024-06-27 20:04:18,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:18,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067985633] [2024-06-27 20:04:18,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:18,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:18,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:18,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:18,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:18,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067985633] [2024-06-27 20:04:18,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067985633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:18,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:18,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:04:18,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856169606] [2024-06-27 20:04:18,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:18,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:04:18,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:18,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:04:18,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:04:18,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:04:18,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 560 transitions, 6823 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:18,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:18,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:04:18,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:20,907 INFO L124 PetriNetUnfolderBase]: 4263/7014 cut-off events. [2024-06-27 20:04:20,907 INFO L125 PetriNetUnfolderBase]: For 2119672/2119672 co-relation queries the response was YES. [2024-06-27 20:04:20,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73876 conditions, 7014 events. 4263/7014 cut-off events. For 2119672/2119672 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 46361 event pairs, 844 based on Foata normal form. 6/7017 useless extension candidates. Maximal degree in co-relation 73680. Up to 6422 conditions per place. [2024-06-27 20:04:21,024 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 535 selfloop transitions, 21 changer transitions 0/587 dead transitions. [2024-06-27 20:04:21,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 587 transitions, 8103 flow [2024-06-27 20:04:21,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:04:21,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:04:21,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 20:04:21,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-27 20:04:21,025 INFO L175 Difference]: Start difference. First operand has 414 places, 560 transitions, 6823 flow. Second operand 9 states and 168 transitions. [2024-06-27 20:04:21,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 587 transitions, 8103 flow [2024-06-27 20:04:29,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 587 transitions, 7951 flow, removed 58 selfloop flow, removed 7 redundant places. [2024-06-27 20:04:29,280 INFO L231 Difference]: Finished difference. Result has 416 places, 564 transitions, 6828 flow [2024-06-27 20:04:29,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6671, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6828, PETRI_PLACES=416, PETRI_TRANSITIONS=564} [2024-06-27 20:04:29,281 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 372 predicate places. [2024-06-27 20:04:29,281 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 564 transitions, 6828 flow [2024-06-27 20:04:29,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:29,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:29,281 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 20:04:29,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-27 20:04:29,282 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 20:04:29,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:29,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1856342779, now seen corresponding path program 2 times [2024-06-27 20:04:29,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:29,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855782663] [2024-06-27 20:04:29,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:29,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:29,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:30,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:30,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:30,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855782663] [2024-06-27 20:04:30,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855782663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:30,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:30,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:04:30,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298796469] [2024-06-27 20:04:30,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:30,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:04:30,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:30,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:04:30,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:04:30,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:04:30,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 564 transitions, 6828 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:30,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:30,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:04:30,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:32,233 INFO L124 PetriNetUnfolderBase]: 4287/7050 cut-off events. [2024-06-27 20:04:32,233 INFO L125 PetriNetUnfolderBase]: For 2164436/2164437 co-relation queries the response was YES. [2024-06-27 20:04:32,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75235 conditions, 7050 events. 4287/7050 cut-off events. For 2164436/2164437 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 46611 event pairs, 846 based on Foata normal form. 6/7051 useless extension candidates. Maximal degree in co-relation 75038. Up to 6447 conditions per place. [2024-06-27 20:04:32,371 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 532 selfloop transitions, 26 changer transitions 0/589 dead transitions. [2024-06-27 20:04:32,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 589 transitions, 8120 flow [2024-06-27 20:04:32,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:04:32,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:04:32,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 20:04:32,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-27 20:04:32,372 INFO L175 Difference]: Start difference. First operand has 416 places, 564 transitions, 6828 flow. Second operand 9 states and 168 transitions. [2024-06-27 20:04:32,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 589 transitions, 8120 flow [2024-06-27 20:04:39,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 589 transitions, 7995 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-27 20:04:39,736 INFO L231 Difference]: Finished difference. Result has 418 places, 568 transitions, 6878 flow [2024-06-27 20:04:39,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6703, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6878, PETRI_PLACES=418, PETRI_TRANSITIONS=568} [2024-06-27 20:04:39,737 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 374 predicate places. [2024-06-27 20:04:39,737 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 568 transitions, 6878 flow [2024-06-27 20:04:39,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:39,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:39,738 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 20:04:39,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-27 20:04:39,738 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 20:04:39,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:39,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1856336269, now seen corresponding path program 3 times [2024-06-27 20:04:39,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:39,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028549059] [2024-06-27 20:04:39,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:39,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:39,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:40,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:40,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:40,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028549059] [2024-06-27 20:04:40,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028549059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:40,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:40,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:04:40,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389286550] [2024-06-27 20:04:40,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:40,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:04:40,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:40,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:04:40,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:04:40,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:04:40,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 568 transitions, 6878 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:40,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:40,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:04:40,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:42,739 INFO L124 PetriNetUnfolderBase]: 4297/7064 cut-off events. [2024-06-27 20:04:42,740 INFO L125 PetriNetUnfolderBase]: For 2162979/2162984 co-relation queries the response was YES. [2024-06-27 20:04:42,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76069 conditions, 7064 events. 4297/7064 cut-off events. For 2162979/2162984 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 46691 event pairs, 844 based on Foata normal form. 4/7064 useless extension candidates. Maximal degree in co-relation 75871. Up to 6435 conditions per place. [2024-06-27 20:04:42,870 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 526 selfloop transitions, 35 changer transitions 0/592 dead transitions. [2024-06-27 20:04:42,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 592 transitions, 8172 flow [2024-06-27 20:04:42,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:04:42,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:04:42,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 20:04:42,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-27 20:04:42,871 INFO L175 Difference]: Start difference. First operand has 418 places, 568 transitions, 6878 flow. Second operand 9 states and 169 transitions. [2024-06-27 20:04:42,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 592 transitions, 8172 flow [2024-06-27 20:04:51,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 592 transitions, 8029 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-27 20:04:51,171 INFO L231 Difference]: Finished difference. Result has 420 places, 571 transitions, 6913 flow [2024-06-27 20:04:51,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6735, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6913, PETRI_PLACES=420, PETRI_TRANSITIONS=571} [2024-06-27 20:04:51,171 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 376 predicate places. [2024-06-27 20:04:51,171 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 571 transitions, 6913 flow [2024-06-27 20:04:51,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:51,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:51,172 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 20:04:51,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-27 20:04:51,172 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 20:04:51,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:51,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1683846379, now seen corresponding path program 4 times [2024-06-27 20:04:51,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:51,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144791130] [2024-06-27 20:04:51,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:51,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:51,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:52,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:52,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:52,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144791130] [2024-06-27 20:04:52,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144791130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:52,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:52,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:04:52,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719445240] [2024-06-27 20:04:52,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:52,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:04:52,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:52,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:04:52,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:04:52,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:04:52,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 571 transitions, 6913 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:52,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:52,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:04:52,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:54,140 INFO L124 PetriNetUnfolderBase]: 4346/7136 cut-off events. [2024-06-27 20:04:54,140 INFO L125 PetriNetUnfolderBase]: For 2253738/2253744 co-relation queries the response was YES. [2024-06-27 20:04:54,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78153 conditions, 7136 events. 4346/7136 cut-off events. For 2253738/2253744 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 47176 event pairs, 851 based on Foata normal form. 3/7134 useless extension candidates. Maximal degree in co-relation 77954. Up to 6491 conditions per place. [2024-06-27 20:04:54,266 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 527 selfloop transitions, 40 changer transitions 0/598 dead transitions. [2024-06-27 20:04:54,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 598 transitions, 8645 flow [2024-06-27 20:04:54,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:04:54,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:04:54,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 20:04:54,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 20:04:54,267 INFO L175 Difference]: Start difference. First operand has 420 places, 571 transitions, 6913 flow. Second operand 9 states and 171 transitions. [2024-06-27 20:04:54,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 598 transitions, 8645 flow [2024-06-27 20:05:02,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 598 transitions, 8493 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-27 20:05:02,847 INFO L231 Difference]: Finished difference. Result has 423 places, 578 transitions, 7093 flow [2024-06-27 20:05:02,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6761, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7093, PETRI_PLACES=423, PETRI_TRANSITIONS=578} [2024-06-27 20:05:02,848 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 379 predicate places. [2024-06-27 20:05:02,848 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 578 transitions, 7093 flow [2024-06-27 20:05:02,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:02,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:02,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:05:02,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-27 20:05:02,848 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 20:05:02,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:02,849 INFO L85 PathProgramCache]: Analyzing trace with hash -2119308163, now seen corresponding path program 5 times [2024-06-27 20:05:02,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:02,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838705985] [2024-06-27 20:05:02,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:02,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:02,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:03,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:05:03,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:03,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838705985] [2024-06-27 20:05:03,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838705985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:03,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:03,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:05:03,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913437780] [2024-06-27 20:05:03,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:03,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:05:03,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:03,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:05:03,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:05:03,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:05:03,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 578 transitions, 7093 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:03,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:03,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:05:03,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:06,023 INFO L124 PetriNetUnfolderBase]: 4334/7120 cut-off events. [2024-06-27 20:05:06,024 INFO L125 PetriNetUnfolderBase]: For 2256645/2256647 co-relation queries the response was YES. [2024-06-27 20:05:06,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78416 conditions, 7120 events. 4334/7120 cut-off events. For 2256645/2256647 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 47080 event pairs, 847 based on Foata normal form. 5/7120 useless extension candidates. Maximal degree in co-relation 78215. Up to 6507 conditions per place. [2024-06-27 20:05:06,139 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 535 selfloop transitions, 33 changer transitions 0/599 dead transitions. [2024-06-27 20:05:06,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 599 transitions, 8400 flow [2024-06-27 20:05:06,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:05:06,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:05:06,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 20:05:06,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-27 20:05:06,140 INFO L175 Difference]: Start difference. First operand has 423 places, 578 transitions, 7093 flow. Second operand 9 states and 166 transitions. [2024-06-27 20:05:06,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 599 transitions, 8400 flow [2024-06-27 20:05:13,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 599 transitions, 8262 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-27 20:05:13,979 INFO L231 Difference]: Finished difference. Result has 427 places, 582 transitions, 7143 flow [2024-06-27 20:05:13,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6959, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7143, PETRI_PLACES=427, PETRI_TRANSITIONS=582} [2024-06-27 20:05:13,979 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 383 predicate places. [2024-06-27 20:05:13,979 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 582 transitions, 7143 flow [2024-06-27 20:05:13,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:13,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:13,980 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 20:05:13,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-27 20:05:13,980 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 20:05:13,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:13,980 INFO L85 PathProgramCache]: Analyzing trace with hash -2119071013, now seen corresponding path program 6 times [2024-06-27 20:05:13,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:13,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446582199] [2024-06-27 20:05:13,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:13,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:14,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:15,153 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 20:05:15,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:15,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446582199] [2024-06-27 20:05:15,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446582199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:15,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:15,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:05:15,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379630830] [2024-06-27 20:05:15,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:15,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:05:15,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:15,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:05:15,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:05:15,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:05:15,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 582 transitions, 7143 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:15,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:15,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:05:15,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:17,230 INFO L124 PetriNetUnfolderBase]: 4347/7139 cut-off events. [2024-06-27 20:05:17,231 INFO L125 PetriNetUnfolderBase]: For 2271214/2271216 co-relation queries the response was YES. [2024-06-27 20:05:17,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78935 conditions, 7139 events. 4347/7139 cut-off events. For 2271214/2271216 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 47208 event pairs, 840 based on Foata normal form. 4/7138 useless extension candidates. Maximal degree in co-relation 78732. Up to 6436 conditions per place. [2024-06-27 20:05:17,362 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 510 selfloop transitions, 64 changer transitions 0/605 dead transitions. [2024-06-27 20:05:17,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 605 transitions, 8791 flow [2024-06-27 20:05:17,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:05:17,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:05:17,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 20:05:17,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 20:05:17,364 INFO L175 Difference]: Start difference. First operand has 427 places, 582 transitions, 7143 flow. Second operand 9 states and 171 transitions. [2024-06-27 20:05:17,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 605 transitions, 8791 flow [2024-06-27 20:05:27,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 605 transitions, 8644 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-27 20:05:27,082 INFO L231 Difference]: Finished difference. Result has 429 places, 585 transitions, 7246 flow [2024-06-27 20:05:27,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6996, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7246, PETRI_PLACES=429, PETRI_TRANSITIONS=585} [2024-06-27 20:05:27,082 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 385 predicate places. [2024-06-27 20:05:27,083 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 585 transitions, 7246 flow [2024-06-27 20:05:27,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:27,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:27,083 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 20:05:27,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-27 20:05:27,083 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 20:05:27,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:27,083 INFO L85 PathProgramCache]: Analyzing trace with hash 2124282239, now seen corresponding path program 7 times [2024-06-27 20:05:27,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:27,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360640931] [2024-06-27 20:05:27,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:27,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:27,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:28,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:05:28,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:28,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360640931] [2024-06-27 20:05:28,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360640931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:28,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:28,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:05:28,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281467606] [2024-06-27 20:05:28,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:28,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:05:28,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:28,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:05:28,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:05:28,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:05:28,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 585 transitions, 7246 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:28,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:28,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:05:28,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:30,200 INFO L124 PetriNetUnfolderBase]: 4376/7184 cut-off events. [2024-06-27 20:05:30,200 INFO L125 PetriNetUnfolderBase]: For 2336886/2336891 co-relation queries the response was YES. [2024-06-27 20:05:30,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80613 conditions, 7184 events. 4376/7184 cut-off events. For 2336886/2336891 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 47531 event pairs, 860 based on Foata normal form. 4/7182 useless extension candidates. Maximal degree in co-relation 80409. Up to 6369 conditions per place. [2024-06-27 20:05:30,329 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 480 selfloop transitions, 99 changer transitions 0/610 dead transitions. [2024-06-27 20:05:30,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 610 transitions, 9058 flow [2024-06-27 20:05:30,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:05:30,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:05:30,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-27 20:05:30,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 20:05:30,331 INFO L175 Difference]: Start difference. First operand has 429 places, 585 transitions, 7246 flow. Second operand 9 states and 172 transitions. [2024-06-27 20:05:30,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 610 transitions, 9058 flow [2024-06-27 20:05:40,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 610 transitions, 8832 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-27 20:05:40,691 INFO L231 Difference]: Finished difference. Result has 432 places, 592 transitions, 7551 flow [2024-06-27 20:05:40,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7020, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7551, PETRI_PLACES=432, PETRI_TRANSITIONS=592} [2024-06-27 20:05:40,691 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 388 predicate places. [2024-06-27 20:05:40,691 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 592 transitions, 7551 flow [2024-06-27 20:05:40,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:40,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:40,692 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 20:05:40,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-27 20:05:40,692 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 20:05:40,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:40,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1942368679, now seen corresponding path program 8 times [2024-06-27 20:05:40,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:40,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871827366] [2024-06-27 20:05:40,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:40,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:40,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:41,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:05:41,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:41,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871827366] [2024-06-27 20:05:41,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871827366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:41,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:41,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:05:41,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740916185] [2024-06-27 20:05:41,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:41,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:05:41,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:41,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:05:41,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:05:41,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:05:41,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 592 transitions, 7551 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:41,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:41,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:05:41,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:44,154 INFO L124 PetriNetUnfolderBase]: 4378/7188 cut-off events. [2024-06-27 20:05:44,154 INFO L125 PetriNetUnfolderBase]: For 2363654/2363659 co-relation queries the response was YES. [2024-06-27 20:05:44,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81580 conditions, 7188 events. 4378/7188 cut-off events. For 2363654/2363659 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 47562 event pairs, 859 based on Foata normal form. 5/7187 useless extension candidates. Maximal degree in co-relation 81374. Up to 6555 conditions per place. [2024-06-27 20:05:44,273 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 537 selfloop transitions, 42 changer transitions 0/610 dead transitions. [2024-06-27 20:05:44,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 610 transitions, 8898 flow [2024-06-27 20:05:44,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:05:44,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:05:44,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 20:05:44,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-27 20:05:44,274 INFO L175 Difference]: Start difference. First operand has 432 places, 592 transitions, 7551 flow. Second operand 9 states and 165 transitions. [2024-06-27 20:05:44,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 610 transitions, 8898 flow [2024-06-27 20:05:55,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 610 transitions, 8725 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-27 20:05:55,172 INFO L231 Difference]: Finished difference. Result has 436 places, 596 transitions, 7598 flow [2024-06-27 20:05:55,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7382, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7598, PETRI_PLACES=436, PETRI_TRANSITIONS=596} [2024-06-27 20:05:55,173 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 392 predicate places. [2024-06-27 20:05:55,173 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 596 transitions, 7598 flow [2024-06-27 20:05:55,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:55,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:55,173 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 20:05:55,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-27 20:05:55,173 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:05:55,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:55,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1942605829, now seen corresponding path program 9 times [2024-06-27 20:05:55,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:55,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144539354] [2024-06-27 20:05:55,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:55,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:55,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:56,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:05:56,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:56,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144539354] [2024-06-27 20:05:56,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144539354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:56,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:56,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:05:56,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269105719] [2024-06-27 20:05:56,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:56,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:05:56,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:56,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:05:56,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:05:56,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:05:56,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 596 transitions, 7598 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:56,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:56,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:05:56,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:58,447 INFO L124 PetriNetUnfolderBase]: 4396/7214 cut-off events. [2024-06-27 20:05:58,447 INFO L125 PetriNetUnfolderBase]: For 2387413/2387422 co-relation queries the response was YES. [2024-06-27 20:05:58,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82227 conditions, 7214 events. 4396/7214 cut-off events. For 2387413/2387422 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 47739 event pairs, 859 based on Foata normal form. 4/7211 useless extension candidates. Maximal degree in co-relation 82019. Up to 6525 conditions per place. [2024-06-27 20:05:58,586 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 528 selfloop transitions, 61 changer transitions 0/620 dead transitions. [2024-06-27 20:05:58,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 620 transitions, 9705 flow [2024-06-27 20:05:58,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:05:58,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:05:58,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-27 20:05:58,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-27 20:05:58,587 INFO L175 Difference]: Start difference. First operand has 436 places, 596 transitions, 7598 flow. Second operand 9 states and 174 transitions. [2024-06-27 20:05:58,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 620 transitions, 9705 flow [2024-06-27 20:06:09,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 620 transitions, 9518 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-27 20:06:09,114 INFO L231 Difference]: Finished difference. Result has 439 places, 602 transitions, 7775 flow [2024-06-27 20:06:09,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7415, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7775, PETRI_PLACES=439, PETRI_TRANSITIONS=602} [2024-06-27 20:06:09,115 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 395 predicate places. [2024-06-27 20:06:09,115 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 602 transitions, 7775 flow [2024-06-27 20:06:09,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:09,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:09,115 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 20:06:09,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-27 20:06:09,116 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 20:06:09,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:09,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1838951729, now seen corresponding path program 10 times [2024-06-27 20:06:09,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:09,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71498166] [2024-06-27 20:06:09,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:09,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:09,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:10,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:10,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:10,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71498166] [2024-06-27 20:06:10,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71498166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:10,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:10,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:06:10,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721834782] [2024-06-27 20:06:10,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:10,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:06:10,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:10,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:06:10,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:06:10,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:06:10,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 602 transitions, 7775 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:10,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:10,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:06:10,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:12,608 INFO L124 PetriNetUnfolderBase]: 4399/7218 cut-off events. [2024-06-27 20:06:12,608 INFO L125 PetriNetUnfolderBase]: For 2391361/2391370 co-relation queries the response was YES. [2024-06-27 20:06:12,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81700 conditions, 7218 events. 4399/7218 cut-off events. For 2391361/2391370 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 47752 event pairs, 858 based on Foata normal form. 3/7215 useless extension candidates. Maximal degree in co-relation 81490. Up to 6562 conditions per place. [2024-06-27 20:06:12,955 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 538 selfloop transitions, 52 changer transitions 0/621 dead transitions. [2024-06-27 20:06:12,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 621 transitions, 9472 flow [2024-06-27 20:06:12,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:06:12,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:06:12,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 20:06:12,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-27 20:06:12,956 INFO L175 Difference]: Start difference. First operand has 439 places, 602 transitions, 7775 flow. Second operand 9 states and 170 transitions. [2024-06-27 20:06:12,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 621 transitions, 9472 flow [2024-06-27 20:06:24,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 621 transitions, 9137 flow, removed 61 selfloop flow, removed 8 redundant places. [2024-06-27 20:06:24,068 INFO L231 Difference]: Finished difference. Result has 440 places, 605 transitions, 7682 flow [2024-06-27 20:06:24,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7452, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7682, PETRI_PLACES=440, PETRI_TRANSITIONS=605} [2024-06-27 20:06:24,084 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 396 predicate places. [2024-06-27 20:06:24,085 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 605 transitions, 7682 flow [2024-06-27 20:06:24,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:24,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:24,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:24,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-27 20:06:24,085 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 20:06:24,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:24,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1615795557, now seen corresponding path program 1 times [2024-06-27 20:06:24,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:24,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253509200] [2024-06-27 20:06:24,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:24,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:24,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:25,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:25,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:25,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253509200] [2024-06-27 20:06:25,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253509200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:25,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:25,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:06:25,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773795479] [2024-06-27 20:06:25,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:25,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:06:25,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:25,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:06:25,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:06:25,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:06:25,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 605 transitions, 7682 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:25,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:25,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:06:25,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:27,617 INFO L124 PetriNetUnfolderBase]: 4420/7205 cut-off events. [2024-06-27 20:06:27,618 INFO L125 PetriNetUnfolderBase]: For 2438463/2438474 co-relation queries the response was YES. [2024-06-27 20:06:27,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81902 conditions, 7205 events. 4420/7205 cut-off events. For 2438463/2438474 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 47333 event pairs, 674 based on Foata normal form. 10/7175 useless extension candidates. Maximal degree in co-relation 81693. Up to 6476 conditions per place. [2024-06-27 20:06:27,809 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 563 selfloop transitions, 29 changer transitions 0/638 dead transitions. [2024-06-27 20:06:27,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 638 transitions, 9076 flow [2024-06-27 20:06:27,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:06:27,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:06:27,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-27 20:06:27,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599483204134367 [2024-06-27 20:06:27,810 INFO L175 Difference]: Start difference. First operand has 440 places, 605 transitions, 7682 flow. Second operand 9 states and 178 transitions. [2024-06-27 20:06:27,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 638 transitions, 9076 flow [2024-06-27 20:06:38,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 638 transitions, 8829 flow, removed 53 selfloop flow, removed 9 redundant places. [2024-06-27 20:06:38,275 INFO L231 Difference]: Finished difference. Result has 440 places, 608 transitions, 7641 flow [2024-06-27 20:06:38,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7435, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7641, PETRI_PLACES=440, PETRI_TRANSITIONS=608} [2024-06-27 20:06:38,275 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 396 predicate places. [2024-06-27 20:06:38,276 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 608 transitions, 7641 flow [2024-06-27 20:06:38,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:38,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:38,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:38,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-27 20:06:38,276 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 20:06:38,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:38,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1418369661, now seen corresponding path program 2 times [2024-06-27 20:06:38,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:38,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287051583] [2024-06-27 20:06:38,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:38,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:38,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:39,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:39,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:39,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287051583] [2024-06-27 20:06:39,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287051583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:39,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:39,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:06:39,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810480171] [2024-06-27 20:06:39,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:39,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:06:39,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:39,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:06:39,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:06:39,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:06:39,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 608 transitions, 7641 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:39,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:39,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:06:39,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:41,820 INFO L124 PetriNetUnfolderBase]: 4436/7229 cut-off events. [2024-06-27 20:06:41,821 INFO L125 PetriNetUnfolderBase]: For 2467063/2467074 co-relation queries the response was YES. [2024-06-27 20:06:41,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82271 conditions, 7229 events. 4436/7229 cut-off events. For 2467063/2467074 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 47523 event pairs, 845 based on Foata normal form. 10/7179 useless extension candidates. Maximal degree in co-relation 82063. Up to 6546 conditions per place. [2024-06-27 20:06:41,941 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 561 selfloop transitions, 30 changer transitions 0/637 dead transitions. [2024-06-27 20:06:41,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 637 transitions, 9029 flow [2024-06-27 20:06:41,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:06:41,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:06:41,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-27 20:06:41,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-27 20:06:41,942 INFO L175 Difference]: Start difference. First operand has 440 places, 608 transitions, 7641 flow. Second operand 9 states and 175 transitions. [2024-06-27 20:06:41,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 637 transitions, 9029 flow [2024-06-27 20:06:51,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 637 transitions, 8845 flow, removed 65 selfloop flow, removed 7 redundant places. [2024-06-27 20:06:51,800 INFO L231 Difference]: Finished difference. Result has 442 places, 611 transitions, 7671 flow [2024-06-27 20:06:51,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7457, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7671, PETRI_PLACES=442, PETRI_TRANSITIONS=611} [2024-06-27 20:06:51,801 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 398 predicate places. [2024-06-27 20:06:51,801 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 611 transitions, 7671 flow [2024-06-27 20:06:51,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:51,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:51,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:51,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-27 20:06:51,802 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 20:06:51,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:51,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1674263165, now seen corresponding path program 3 times [2024-06-27 20:06:51,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:51,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394978035] [2024-06-27 20:06:51,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:51,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:51,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:52,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:52,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:52,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394978035] [2024-06-27 20:06:52,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394978035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:52,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:52,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:06:52,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826206929] [2024-06-27 20:06:52,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:52,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:06:52,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:52,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:06:52,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:06:53,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:06:53,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 611 transitions, 7671 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:53,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:53,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:06:53,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:55,524 INFO L124 PetriNetUnfolderBase]: 4452/7253 cut-off events. [2024-06-27 20:06:55,524 INFO L125 PetriNetUnfolderBase]: For 2498605/2498616 co-relation queries the response was YES. [2024-06-27 20:06:55,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82767 conditions, 7253 events. 4452/7253 cut-off events. For 2498605/2498616 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 47744 event pairs, 849 based on Foata normal form. 10/7203 useless extension candidates. Maximal degree in co-relation 82558. Up to 6580 conditions per place. [2024-06-27 20:06:55,646 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 562 selfloop transitions, 31 changer transitions 0/639 dead transitions. [2024-06-27 20:06:55,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 639 transitions, 9067 flow [2024-06-27 20:06:55,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:06:55,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:06:55,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-27 20:06:55,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-27 20:06:55,651 INFO L175 Difference]: Start difference. First operand has 442 places, 611 transitions, 7671 flow. Second operand 9 states and 175 transitions. [2024-06-27 20:06:55,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 639 transitions, 9067 flow [2024-06-27 20:07:06,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 639 transitions, 8875 flow, removed 68 selfloop flow, removed 7 redundant places. [2024-06-27 20:07:06,395 INFO L231 Difference]: Finished difference. Result has 444 places, 614 transitions, 7701 flow [2024-06-27 20:07:06,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7479, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7701, PETRI_PLACES=444, PETRI_TRANSITIONS=614} [2024-06-27 20:07:06,397 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 400 predicate places. [2024-06-27 20:07:06,397 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 614 transitions, 7701 flow [2024-06-27 20:07:06,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:06,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:06,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:06,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-27 20:07:06,398 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 20:07:06,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:06,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1663114313, now seen corresponding path program 1 times [2024-06-27 20:07:06,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:06,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672441414] [2024-06-27 20:07:06,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:06,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:06,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:07,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:07,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:07,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672441414] [2024-06-27 20:07:07,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672441414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:07,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:07,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:07:07,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021010133] [2024-06-27 20:07:07,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:07,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:07:07,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:07,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:07:07,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:07:07,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:07:07,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 614 transitions, 7701 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:07,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:07,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:07:07,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:09,664 INFO L124 PetriNetUnfolderBase]: 4634/7485 cut-off events. [2024-06-27 20:07:09,665 INFO L125 PetriNetUnfolderBase]: For 2473053/2473056 co-relation queries the response was YES. [2024-06-27 20:07:09,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84222 conditions, 7485 events. 4634/7485 cut-off events. For 2473053/2473056 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 48607 event pairs, 896 based on Foata normal form. 1/7482 useless extension candidates. Maximal degree in co-relation 84012. Up to 6951 conditions per place. [2024-06-27 20:07:09,788 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 596 selfloop transitions, 42 changer transitions 0/643 dead transitions. [2024-06-27 20:07:09,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 643 transitions, 9144 flow [2024-06-27 20:07:09,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:07:09,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:07:09,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 20:07:09,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-27 20:07:09,790 INFO L175 Difference]: Start difference. First operand has 444 places, 614 transitions, 7701 flow. Second operand 8 states and 156 transitions. [2024-06-27 20:07:09,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 643 transitions, 9144 flow [2024-06-27 20:07:21,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 643 transitions, 8944 flow, removed 71 selfloop flow, removed 7 redundant places. [2024-06-27 20:07:21,092 INFO L231 Difference]: Finished difference. Result has 445 places, 617 transitions, 7698 flow [2024-06-27 20:07:21,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7501, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7698, PETRI_PLACES=445, PETRI_TRANSITIONS=617} [2024-06-27 20:07:21,093 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 401 predicate places. [2024-06-27 20:07:21,093 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 617 transitions, 7698 flow [2024-06-27 20:07:21,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:21,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:21,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:21,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-27 20:07:21,094 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 20:07:21,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:21,094 INFO L85 PathProgramCache]: Analyzing trace with hash 988903726, now seen corresponding path program 1 times [2024-06-27 20:07:21,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:21,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119736581] [2024-06-27 20:07:21,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:21,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:21,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:21,881 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 20:07:21,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:21,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119736581] [2024-06-27 20:07:21,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119736581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:21,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:21,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:07:21,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978082136] [2024-06-27 20:07:21,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:21,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:07:21,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:21,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:07:21,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:07:21,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:07:21,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 617 transitions, 7698 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:21,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:21,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:07:21,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:24,516 INFO L124 PetriNetUnfolderBase]: 4654/7517 cut-off events. [2024-06-27 20:07:24,516 INFO L125 PetriNetUnfolderBase]: For 2538866/2538869 co-relation queries the response was YES. [2024-06-27 20:07:24,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84679 conditions, 7517 events. 4654/7517 cut-off events. For 2538866/2538869 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 48880 event pairs, 898 based on Foata normal form. 4/7517 useless extension candidates. Maximal degree in co-relation 84468. Up to 6857 conditions per place. [2024-06-27 20:07:24,658 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 582 selfloop transitions, 62 changer transitions 0/649 dead transitions. [2024-06-27 20:07:24,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 649 transitions, 9240 flow [2024-06-27 20:07:24,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:07:24,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:07:24,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-27 20:07:24,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-27 20:07:24,768 INFO L175 Difference]: Start difference. First operand has 445 places, 617 transitions, 7698 flow. Second operand 9 states and 175 transitions. [2024-06-27 20:07:24,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 649 transitions, 9240 flow [2024-06-27 20:07:35,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 649 transitions, 9080 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-27 20:07:35,331 INFO L231 Difference]: Finished difference. Result has 448 places, 621 transitions, 7845 flow [2024-06-27 20:07:35,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7538, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7845, PETRI_PLACES=448, PETRI_TRANSITIONS=621} [2024-06-27 20:07:35,331 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 404 predicate places. [2024-06-27 20:07:35,331 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 621 transitions, 7845 flow [2024-06-27 20:07:35,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:35,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:35,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:35,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-27 20:07:35,332 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:35,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:35,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1668476693, now seen corresponding path program 2 times [2024-06-27 20:07:35,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:35,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108487779] [2024-06-27 20:07:35,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:35,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:35,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:36,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:36,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:36,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108487779] [2024-06-27 20:07:36,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108487779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:36,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:36,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:07:36,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676476159] [2024-06-27 20:07:36,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:36,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:07:36,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:36,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:07:36,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:07:36,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:07:36,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 621 transitions, 7845 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:36,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:36,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:07:36,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:38,541 INFO L124 PetriNetUnfolderBase]: 4659/7526 cut-off events. [2024-06-27 20:07:38,541 INFO L125 PetriNetUnfolderBase]: For 2540973/2540976 co-relation queries the response was YES. [2024-06-27 20:07:38,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85736 conditions, 7526 events. 4659/7526 cut-off events. For 2540973/2540976 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 48872 event pairs, 894 based on Foata normal form. 1/7523 useless extension candidates. Maximal degree in co-relation 85524. Up to 6986 conditions per place. [2024-06-27 20:07:38,668 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 603 selfloop transitions, 39 changer transitions 0/647 dead transitions. [2024-06-27 20:07:38,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 647 transitions, 9294 flow [2024-06-27 20:07:38,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:07:38,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:07:38,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 20:07:38,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 20:07:38,669 INFO L175 Difference]: Start difference. First operand has 448 places, 621 transitions, 7845 flow. Second operand 8 states and 152 transitions. [2024-06-27 20:07:38,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 647 transitions, 9294 flow [2024-06-27 20:07:50,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 647 transitions, 9062 flow, removed 78 selfloop flow, removed 6 redundant places. [2024-06-27 20:07:50,841 INFO L231 Difference]: Finished difference. Result has 450 places, 624 transitions, 7810 flow [2024-06-27 20:07:50,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7613, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7810, PETRI_PLACES=450, PETRI_TRANSITIONS=624} [2024-06-27 20:07:50,841 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 406 predicate places. [2024-06-27 20:07:50,842 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 624 transitions, 7810 flow [2024-06-27 20:07:50,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:50,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:50,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:50,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-27 20:07:50,842 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:50,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:50,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1311081916, now seen corresponding path program 2 times [2024-06-27 20:07:50,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:50,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583497826] [2024-06-27 20:07:50,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:50,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:50,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:51,632 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 20:07:51,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:51,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583497826] [2024-06-27 20:07:51,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583497826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:51,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:51,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:07:51,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208910646] [2024-06-27 20:07:51,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:51,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:07:51,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:51,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:07:51,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:07:51,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:07:51,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 624 transitions, 7810 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:51,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:51,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:07:51,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:54,214 INFO L124 PetriNetUnfolderBase]: 4679/7556 cut-off events. [2024-06-27 20:07:54,214 INFO L125 PetriNetUnfolderBase]: For 2614576/2614579 co-relation queries the response was YES. [2024-06-27 20:07:54,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85989 conditions, 7556 events. 4679/7556 cut-off events. For 2614576/2614579 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 49167 event pairs, 898 based on Foata normal form. 4/7556 useless extension candidates. Maximal degree in co-relation 85777. Up to 6874 conditions per place. [2024-06-27 20:07:54,338 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 580 selfloop transitions, 69 changer transitions 0/654 dead transitions. [2024-06-27 20:07:54,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 654 transitions, 9380 flow [2024-06-27 20:07:54,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:07:54,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:07:54,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-27 20:07:54,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-27 20:07:54,339 INFO L175 Difference]: Start difference. First operand has 450 places, 624 transitions, 7810 flow. Second operand 9 states and 175 transitions. [2024-06-27 20:07:54,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 654 transitions, 9380 flow [2024-06-27 20:08:05,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 654 transitions, 9220 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-27 20:08:05,827 INFO L231 Difference]: Finished difference. Result has 453 places, 628 transitions, 7979 flow [2024-06-27 20:08:05,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7650, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7979, PETRI_PLACES=453, PETRI_TRANSITIONS=628} [2024-06-27 20:08:05,844 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 409 predicate places. [2024-06-27 20:08:05,844 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 628 transitions, 7979 flow [2024-06-27 20:08:05,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:05,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:08:05,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:08:05,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-27 20:08:05,845 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:08:05,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:08:05,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1663293803, now seen corresponding path program 3 times [2024-06-27 20:08:05,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:08:05,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872488523] [2024-06-27 20:08:05,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:08:05,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:08:05,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:06,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:08:06,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:06,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872488523] [2024-06-27 20:08:06,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872488523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:06,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:06,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:08:06,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354700297] [2024-06-27 20:08:06,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:06,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:08:06,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:06,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:08:06,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:08:06,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:08:06,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 628 transitions, 7979 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:06,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:08:06,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:08:06,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:09,211 INFO L124 PetriNetUnfolderBase]: 4692/7576 cut-off events. [2024-06-27 20:08:09,211 INFO L125 PetriNetUnfolderBase]: For 2630887/2630890 co-relation queries the response was YES. [2024-06-27 20:08:09,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87419 conditions, 7576 events. 4692/7576 cut-off events. For 2630887/2630890 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 49344 event pairs, 894 based on Foata normal form. 1/7573 useless extension candidates. Maximal degree in co-relation 87206. Up to 7016 conditions per place. [2024-06-27 20:08:09,336 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 599 selfloop transitions, 54 changer transitions 0/658 dead transitions. [2024-06-27 20:08:09,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 658 transitions, 9891 flow [2024-06-27 20:08:09,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:08:09,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:08:09,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 20:08:09,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-27 20:08:09,337 INFO L175 Difference]: Start difference. First operand has 453 places, 628 transitions, 7979 flow. Second operand 8 states and 156 transitions. [2024-06-27 20:08:09,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 658 transitions, 9891 flow [2024-06-27 20:08:19,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 658 transitions, 9596 flow, removed 81 selfloop flow, removed 7 redundant places. [2024-06-27 20:08:19,920 INFO L231 Difference]: Finished difference. Result has 454 places, 634 transitions, 8030 flow [2024-06-27 20:08:19,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7684, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8030, PETRI_PLACES=454, PETRI_TRANSITIONS=634} [2024-06-27 20:08:19,920 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 410 predicate places. [2024-06-27 20:08:19,920 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 634 transitions, 8030 flow [2024-06-27 20:08:19,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:19,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:08:19,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:08:19,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-27 20:08:19,921 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:08:19,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:08:19,921 INFO L85 PathProgramCache]: Analyzing trace with hash 529655299, now seen corresponding path program 4 times [2024-06-27 20:08:19,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:08:19,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663553719] [2024-06-27 20:08:19,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:08:19,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:08:19,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:20,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:08:20,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:20,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663553719] [2024-06-27 20:08:20,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663553719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:20,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:20,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:08:20,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567538576] [2024-06-27 20:08:20,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:20,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:08:20,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:20,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:08:20,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:08:20,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:08:20,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 634 transitions, 8030 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:20,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:08:20,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:08:20,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:23,189 INFO L124 PetriNetUnfolderBase]: 4697/7585 cut-off events. [2024-06-27 20:08:23,189 INFO L125 PetriNetUnfolderBase]: For 2658021/2658024 co-relation queries the response was YES. [2024-06-27 20:08:23,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87247 conditions, 7585 events. 4697/7585 cut-off events. For 2658021/2658024 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 49392 event pairs, 894 based on Foata normal form. 1/7582 useless extension candidates. Maximal degree in co-relation 87033. Up to 7022 conditions per place. [2024-06-27 20:08:23,442 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 602 selfloop transitions, 50 changer transitions 0/657 dead transitions. [2024-06-27 20:08:23,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 657 transitions, 9503 flow [2024-06-27 20:08:23,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:08:23,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:08:23,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:08:23,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-27 20:08:23,443 INFO L175 Difference]: Start difference. First operand has 454 places, 634 transitions, 8030 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:08:23,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 657 transitions, 9503 flow [2024-06-27 20:08:34,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 657 transitions, 9358 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-27 20:08:34,838 INFO L231 Difference]: Finished difference. Result has 458 places, 637 transitions, 8117 flow [2024-06-27 20:08:34,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7885, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8117, PETRI_PLACES=458, PETRI_TRANSITIONS=637} [2024-06-27 20:08:34,838 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 414 predicate places. [2024-06-27 20:08:34,839 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 637 transitions, 8117 flow [2024-06-27 20:08:34,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:34,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:08:34,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:08:34,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-27 20:08:34,839 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:08:34,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:08:34,839 INFO L85 PathProgramCache]: Analyzing trace with hash -530582889, now seen corresponding path program 1 times [2024-06-27 20:08:34,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:08:34,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217845660] [2024-06-27 20:08:34,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:08:34,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:08:34,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:35,704 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 20:08:35,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:35,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217845660] [2024-06-27 20:08:35,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217845660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:35,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:35,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:08:35,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304434249] [2024-06-27 20:08:35,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:35,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:08:35,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:35,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:08:35,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:08:35,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:08:35,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 637 transitions, 8117 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:35,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:08:35,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:08:35,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:38,281 INFO L124 PetriNetUnfolderBase]: 4707/7599 cut-off events. [2024-06-27 20:08:38,282 INFO L125 PetriNetUnfolderBase]: For 2703075/2703078 co-relation queries the response was YES. [2024-06-27 20:08:38,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87714 conditions, 7599 events. 4707/7599 cut-off events. For 2703075/2703078 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 49436 event pairs, 892 based on Foata normal form. 2/7597 useless extension candidates. Maximal degree in co-relation 87498. Up to 7044 conditions per place. [2024-06-27 20:08:38,410 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 616 selfloop transitions, 44 changer transitions 0/665 dead transitions. [2024-06-27 20:08:38,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 665 transitions, 9651 flow [2024-06-27 20:08:38,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:08:38,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:08:38,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 20:08:38,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-27 20:08:38,411 INFO L175 Difference]: Start difference. First operand has 458 places, 637 transitions, 8117 flow. Second operand 9 states and 169 transitions. [2024-06-27 20:08:38,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 665 transitions, 9651 flow [2024-06-27 20:08:49,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 665 transitions, 9458 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-27 20:08:49,637 INFO L231 Difference]: Finished difference. Result has 461 places, 641 transitions, 8181 flow [2024-06-27 20:08:49,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7924, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=593, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8181, PETRI_PLACES=461, PETRI_TRANSITIONS=641} [2024-06-27 20:08:49,637 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 417 predicate places. [2024-06-27 20:08:49,637 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 641 transitions, 8181 flow [2024-06-27 20:08:49,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:49,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:08:49,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:08:49,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-27 20:08:49,638 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:08:49,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:08:49,638 INFO L85 PathProgramCache]: Analyzing trace with hash 994617429, now seen corresponding path program 5 times [2024-06-27 20:08:49,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:08:49,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526234473] [2024-06-27 20:08:49,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:08:49,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:08:49,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:50,411 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 20:08:50,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:50,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526234473] [2024-06-27 20:08:50,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526234473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:50,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:50,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:08:50,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498519524] [2024-06-27 20:08:50,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:50,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:08:50,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:50,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:08:50,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:08:50,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:08:50,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 641 transitions, 8181 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:50,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:08:50,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:08:50,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:53,009 INFO L124 PetriNetUnfolderBase]: 4720/7619 cut-off events. [2024-06-27 20:08:53,009 INFO L125 PetriNetUnfolderBase]: For 2739407/2739410 co-relation queries the response was YES. [2024-06-27 20:08:53,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88843 conditions, 7619 events. 4720/7619 cut-off events. For 2739407/2739410 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 49604 event pairs, 892 based on Foata normal form. 1/7616 useless extension candidates. Maximal degree in co-relation 88626. Up to 6978 conditions per place. [2024-06-27 20:08:53,144 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 573 selfloop transitions, 88 changer transitions 0/666 dead transitions. [2024-06-27 20:08:53,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 666 transitions, 10451 flow [2024-06-27 20:08:53,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:08:53,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:08:53,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 20:08:53,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-27 20:08:53,145 INFO L175 Difference]: Start difference. First operand has 461 places, 641 transitions, 8181 flow. Second operand 8 states and 151 transitions. [2024-06-27 20:08:53,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 666 transitions, 10451 flow [2024-06-27 20:09:03,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 666 transitions, 10222 flow, removed 73 selfloop flow, removed 7 redundant places. [2024-06-27 20:09:03,913 INFO L231 Difference]: Finished difference. Result has 462 places, 647 transitions, 8386 flow [2024-06-27 20:09:03,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7952, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8386, PETRI_PLACES=462, PETRI_TRANSITIONS=647} [2024-06-27 20:09:03,914 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 418 predicate places. [2024-06-27 20:09:03,914 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 647 transitions, 8386 flow [2024-06-27 20:09:03,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:09:03,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:09:03,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:09:03,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-27 20:09:03,915 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:09:03,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:09:03,916 INFO L85 PathProgramCache]: Analyzing trace with hash 994617863, now seen corresponding path program 2 times [2024-06-27 20:09:03,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:09:03,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454675493] [2024-06-27 20:09:03,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:09:03,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:09:03,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:09:05,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:09:05,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:09:05,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454675493] [2024-06-27 20:09:05,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454675493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:09:05,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:09:05,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:09:05,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057361291] [2024-06-27 20:09:05,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:09:05,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:09:05,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:09:05,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:09:05,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:09:05,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:09:05,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 647 transitions, 8386 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:09:05,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:09:05,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:09:05,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:09:07,690 INFO L124 PetriNetUnfolderBase]: 4730/7633 cut-off events. [2024-06-27 20:09:07,690 INFO L125 PetriNetUnfolderBase]: For 2787570/2787573 co-relation queries the response was YES. [2024-06-27 20:09:07,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89192 conditions, 7633 events. 4730/7633 cut-off events. For 2787570/2787573 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 49711 event pairs, 892 based on Foata normal form. 2/7631 useless extension candidates. Maximal degree in co-relation 88974. Up to 7064 conditions per place. [2024-06-27 20:09:07,833 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 616 selfloop transitions, 51 changer transitions 0/672 dead transitions. [2024-06-27 20:09:07,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 672 transitions, 9934 flow [2024-06-27 20:09:07,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:09:07,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:09:07,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 20:09:07,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-27 20:09:07,835 INFO L175 Difference]: Start difference. First operand has 462 places, 647 transitions, 8386 flow. Second operand 9 states and 168 transitions. [2024-06-27 20:09:07,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 672 transitions, 9934 flow [2024-06-27 20:09:17,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 672 transitions, 9719 flow, removed 57 selfloop flow, removed 4 redundant places. [2024-06-27 20:09:17,435 INFO L231 Difference]: Finished difference. Result has 467 places, 651 transitions, 8450 flow [2024-06-27 20:09:17,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8171, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8450, PETRI_PLACES=467, PETRI_TRANSITIONS=651} [2024-06-27 20:09:17,435 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 423 predicate places. [2024-06-27 20:09:17,436 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 651 transitions, 8450 flow [2024-06-27 20:09:17,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:09:17,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:09:17,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:09:17,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-27 20:09:17,436 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:09:17,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:09:17,437 INFO L85 PathProgramCache]: Analyzing trace with hash -301354432, now seen corresponding path program 3 times [2024-06-27 20:09:17,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:09:17,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873837122] [2024-06-27 20:09:17,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:09:17,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:09:17,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:09:18,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:09:18,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:09:18,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873837122] [2024-06-27 20:09:18,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873837122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:09:18,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:09:18,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:09:18,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218556379] [2024-06-27 20:09:18,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:09:18,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:09:18,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:09:18,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:09:18,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:09:18,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:09:18,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 651 transitions, 8450 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:09:18,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:09:18,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:09:18,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:09:20,950 INFO L124 PetriNetUnfolderBase]: 4750/7665 cut-off events. [2024-06-27 20:09:20,951 INFO L125 PetriNetUnfolderBase]: For 2854096/2854099 co-relation queries the response was YES. [2024-06-27 20:09:21,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90335 conditions, 7665 events. 4750/7665 cut-off events. For 2854096/2854099 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 49967 event pairs, 896 based on Foata normal form. 4/7665 useless extension candidates. Maximal degree in co-relation 90116. Up to 6949 conditions per place. [2024-06-27 20:09:21,245 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 594 selfloop transitions, 79 changer transitions 0/678 dead transitions. [2024-06-27 20:09:21,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 678 transitions, 10076 flow [2024-06-27 20:09:21,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:09:21,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:09:21,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-27 20:09:21,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-27 20:09:21,246 INFO L175 Difference]: Start difference. First operand has 467 places, 651 transitions, 8450 flow. Second operand 9 states and 174 transitions. [2024-06-27 20:09:21,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 678 transitions, 10076 flow Killed by 15